Plasmodium

Last updated

Plasmodium
Malaria.jpg
False-colored electron micrograph of a sporozoite
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Clade: Diaphoretickes
Clade: SAR
Clade: Alveolata
Phylum: Apicomplexa
Class: Aconoidasida
Order: Haemospororida
Family: Plasmodiidae
Genus: Plasmodium
Marchiafava & Celli, 1885

Plasmodium is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. The life cycles of Plasmodium species involve development in a blood-feeding insect host which then injects parasites into a vertebrate host during a blood meal. Parasites grow within a vertebrate body tissue (often the liver) before entering the bloodstream to infect red blood cells. The ensuing destruction of host red blood cells can result in malaria. During this infection, some parasites are picked up by a blood-feeding insect (mosquitoes in majority cases), continuing the life cycle. [1]

Contents

Plasmodium is a member of the phylum Apicomplexa, a large group of parasitic eukaryotes. Within Apicomplexa, Plasmodium is in the order Haemosporida and family Plasmodiidae. Over 200 species of Plasmodium have been described, many of which have been subdivided into 14 subgenera based on parasite morphology and host range. Evolutionary relationships among different Plasmodium species do not always follow taxonomic boundaries; some species that are morphologically similar or infect the same host turn out to be distantly related.

Species of Plasmodium are distributed globally wherever suitable hosts are found. Insect hosts are most frequently mosquitoes of the genera Culex and Anopheles . Vertebrate hosts include reptiles, birds, and mammals. Plasmodium parasites were first identified in the late 19th century by Charles Laveran. Over the course of the 20th century, many other species were discovered in various hosts and classified, including five species that regularly infect humans: P. vivax , P. falciparum , P. malariae , P. ovale , and P. knowlesi . P. falciparum is by far the most lethal in humans, resulting in hundreds of thousands of deaths per year. A number of drugs have been developed to treat Plasmodium infection; however, the parasites have evolved resistance to each drug developed.

Although the parasite can also infect people via blood transfusion, this is very rare, and Plasmodium cannot be spread from person to person. Some of subspecies of Plasmodium are obligate intracellular parasites.

Description

Plasmodium is a eukaryote but with unusual features. Plasmodium.png
Plasmodium is a eukaryote but with unusual features.

The genus Plasmodium consists of all eukaryotes in the phylum Apicomplexa that both undergo the asexual replication process of merogony inside host red blood cells and produce the crystalline pigment hemozoin as a byproduct of digesting host hemoglobin. [2] Plasmodium species contain many features that are common to other eukaryotes, and some that are unique to their phylum or genus. The Plasmodium genome is separated into 14 chromosomes contained in the nucleus. Plasmodium parasites maintain a single copy of their genome through much of the life cycle, doubling the genome only for a brief sexual exchange within the midgut of the insect host. [3] Attached to the nucleus is the endoplasmic reticulum (ER), which functions similarly to the ER in other eukaryotes. Proteins are trafficked from the ER to the Golgi apparatus which generally consists of a single membrane-bound compartment in Apicomplexans. [4] From here, proteins are trafficked to various cellular compartments or to the cell surface. [4]

Like other apicomplexans, Plasmodium species have several cellular structures at the apical end of the parasite that serve as specialized organelles for secreting effectors into the host. The most prominent are the bulbous rhoptries which contain parasite proteins involved in invading the host cell and modifying the host once inside. [5] Adjacent to the rhoptries are smaller structures termed micronemes that contain parasite proteins required for motility as well as recognizing and attaching to host cells. [6] Spread throughout the parasite are secretory vesicles called dense granules that contain parasite proteins involved in modifying the membrane that separates the parasite from the host, termed the parasitophorous vacuole. [6]

Species of Plasmodium also contain two large membrane-bound organelles of endosymbiotic origin, the mitochondrion and the apicoplast, both of which play key roles in the parasite's metabolism. Unlike mammalian cells which contain many mitochondria, Plasmodium cells contain a single large mitochondrion that coordinates its division with that of the Plasmodium cell. [7] Like in other eukaryotes, the Plasmodium mitochondrion is capable of generating energy in the form of ATP via the citric acid cycle; however, this function is only required for parasite survival in the insect host, and is not needed for growth in red blood cells. [7] A second organelle, the apicoplast, is derived from a secondary endosymbiosis event, in this case the acquisition of a red alga by the Plasmodium ancestor. [8] The apicoplast is involved in the synthesis of various metabolic precursors, including fatty acids, isoprenoids, iron-sulphur clusters, and components of the heme biosynthesis pathway. [9]

Life cycle

Life cycle of a species that infects humans Life Cycle of the Malaria Parasite.jpg
Life cycle of a species that infects humans
Ring forms of Plasmodium inside human red blood cells (Giemsa stain) Malarial parasites, Plasmodium species, ring forms in red blood cells.jpg
Ring forms of Plasmodium inside human red blood cells (Giemsa stain)

The life cycle of Plasmodium involves several distinct stages in the insect and vertebrate hosts. Parasites are generally introduced into a vertebrate host by the bite of an insect host (generally a mosquito, with the exception of some Plasmodium species of reptiles). [10] Parasites first infect the liver or other tissue, where they undergo a single large round of replication before exiting the host cell to infect erythrocytes. [11] At this point, some species of Plasmodium of primates can form a long-lived dormant stage called a hypnozoite. [12] It can remain in the liver for more than a year. [13] However, for most Plasmodium species, the parasites in infected liver cells are only what are called merozoites. After emerging from the liver, they enter red blood cells, as explained above. They then go through continuous cycles of erythrocyte infection, while a small percentage of parasites differentiate into a sexual stage called a gametocyte which is picked up by an insect host taking a blood meal. In some hosts, invasion of erythrocytes by Plasmodium species can result in disease, called malaria. This can sometimes be severe, rapidly followed by death of the host (e.g. P. falciparum in humans). In other hosts, Plasmodium infection can apparently be asymptomatic. [10]

Even when humans have such subclinical plasmodial infections, there can nevertheless be very large numbers of multiplying parasites concealed in, particularly, the spleen and bone marrow. Certainly, this applies in the case of P. vivax. These hidden parasites (in addition to hypnozoites) are thought to be the origin of instances of recurrent P. vivax malaria. [14]

Sporozoites, one of several different forms of the parasite, from a mosquito Malaria Sporozoites (16657642929).jpg
Sporozoites, one of several different forms of the parasite, from a mosquito

Within the red blood cells, the merozoites grow first to a ring-shaped form and then to a larger form called a trophozoite. Trophozoites then mature to schizonts which divide several times to produce new merozoites. The infected red blood cell eventually bursts, allowing the new merozoites to travel within the bloodstream to infect new red blood cells. Most merozoites continue this replicative cycle, however some merozoites upon infecting red blood cells differentiate into male or female sexual forms called gametocytes. These gametocytes circulate in the blood until they are taken up when a mosquito feeds on the infected vertebrate host, taking up blood which includes the gametocytes. [11]

In the mosquito, the gametocytes move along with the blood meal to the mosquito's midgut. Here the gametocytes develop into male and female gametes which fertilize each other, forming a zygote. Zygotes then develop into a motile form called an ookinete, which penetrates the wall of the midgut. Upon traversing the midgut wall, the ookinete embeds into the gut's exterior membrane and develops into an oocyst. Oocysts divide many times to produce large numbers of small elongated sporozoites. These sporozoites migrate to the salivary glands of the mosquito where they can be injected into the blood of the next host the mosquito bites, repeating the cycle. [11]

Evolution and taxonomy

Oldest mosquito fossil with Plasmodium dominicana, 15-20 million years old Culex malariager in Dominican amber.jpg
Oldest mosquito fossil with Plasmodium dominicana , 15–20 million years old

Taxonomy

Plasmodium belongs to the phylum Apicomplexa, a taxonomic group of single-celled parasites with characteristic secretory organelles at one end of the cell. [15] Within Apicomplexa, Plasmodium is within the order Haemosporida, a group that includes all apicomplexans that live within blood cells. [16] Based on the presence of the pigment hemozoin and the method of asexual reproduction, the order is further split into four families, of which Plasmodium is in the family Plasmodiidae. [17]

The genus Plasmodium consists of over 200 species, generally described on the basis of their appearance in blood smears of infected vertebrates. [18] These species have been categorized on the basis of their morphology and host range into 14 subgenera: [17]

Species infecting monkeys and apes with the exceptions of P. falciparum and P. reichenowi (which together make up the subgenus Laverania) are classified in the subgenus Plasmodium. Parasites infecting other mammals including some primates (lemurs and others) are classified in the subgenus Vinckeia. The five subgenera Bennettinia, Giovannolaia, Haemamoeba, Huffia, and Novyella contain the known avian malarial species. [19] The remaining subgenera: Asiamoeba, Carinamoeba, Lacertamoeba, Ophidiella, Paraplasmodium, and Sauramoeba contain the diverse groups of parasites found to infect reptiles. [20]

Phylogeny

More recent studies of Plasmodium species using molecular methods have implied that the group's evolution has not perfectly followed taxonomy. [2] Many Plasmodium species that are morphologically similar or infect the same hosts turn out to be only distantly related. [21] In the 1990s, several studies sought to evaluate evolutionary relationships of Plasmodium species by comparing ribosomal RNA and a surface protein gene from various species, finding the human parasite P. falciparum to be more closely related to avian parasites than to other parasites of primates. [17] However, later studies sampling more Plasmodium species found the parasites of mammals to form a clade along with the genus Hepatocystis , while the parasites of birds or lizards appear to form a separate clade with evolutionary relationships not following the subgenera: [17] [22]

Leucocytozoon

Haemoproteus

Plasmodium

Plasmodium of lizards and birds

Subgenus Laverania

Subgenus Plasmodium

Subgenus Vinckeia

Hepatocystis (parasites of bats)

Estimates for when different Plasmodium lineages diverged have differed broadly. Estimates for the diversification of the order Haemosporida range from around 16.2 million to 100 million years ago. [17] There has been particular interest in dating the divergence of the human parasite P. falciparum from other Plasmodium lineages due to its medical importance. For this, estimated dates range from 110,000 to 2.5 million years ago. [17]

Distribution

Plasmodium species are distributed globally. All Plasmodium species are parasitic and must pass between a vertebrate host and an insect host to complete their life cycles. Different species of Plasmodium display different host ranges, with some species restricted to a single vertebrate and insect host, while other species can infect several species of vertebrates and/or insects.

Vertebrates

Many birds, from raptors to passerines like the red-whiskered bulbul (Pycnonotus jocosus), can carry malaria. Red-Whiskered Bulbul-1.jpg
Many birds, from raptors to passerines like the red-whiskered bulbul (Pycnonotus jocosus), can carry malaria.

Plasmodium parasites have been described in a broad array of vertebrate hosts including reptiles, birds, and mammals. [23] While many species can infect more than one vertebrate host, they are generally specific to one of these classes (such as birds). [23]

Relative incidence of Plasmodium species by country of origin for imported cases to non-endemic countries Relative incidence of Plasmodium (malaria) species by country of origin for imported cases to non-endemic countries.png
Relative incidence of Plasmodium species by country of origin for imported cases to non-endemic countries
A clinic for treating human malaria in Tanzania Saving Lives with SMS for Life.jpg
A clinic for treating human malaria in Tanzania

Humans are primarily infected by five species of Plasmodium, with the overwhelming majority of severe disease and death caused by Plasmodium falciparum . [25] Some species that infect humans can also infect other primates, and zoonoses of certain species (e.g. P. knowlesi ) from other primates to humans are common. [25] Non-human primates also contain a variety of Plasmodium species that do not generally infect humans. Some of these can cause severe disease in primates, while others can remain in the host for prolonged periods without causing disease. [26] Many other mammals also carry Plasmodium species, such as a variety of rodents, ungulates, and bats. Again, some species of Plasmodium can cause severe disease in some of these hosts, while many appear not to. [27]

Over 150 species of Plasmodium infect a broad variety of birds. In general each species of Plasmodium infects one to a few species of birds. [28] Plasmodium parasites that infect birds tend to persist in a given host for years or for the life time of the host, although in some cases Plasmodium infections can result in severe illness and rapid death. [29] [30] Unlike with Plasmodium species infecting mammals, those infecting birds are distributed across the globe. [28]

Over 3000 species of lizard, including the Carolina anole (Anolis carolinensis), carry some 90 kinds of malaria. Anolis carolinensis.jpg
Over 3000 species of lizard, including the Carolina anole (Anolis carolinensis), carry some 90 kinds of malaria.

Species from several subgenera of Plasmodium infect diverse reptiles. Plasmodium parasites have been described in most lizard families and, like avian parasites, are spread worldwide. [31] Again, parasites can result either in severe disease or be apparently asymptomatic depending on the parasite and the host. [31]

A number of drugs have been developed over the years to control Plasmodium infection in vertebrate hosts, particularly in humans. Quinine was used as a frontline antimalarial from the 17th century until widespread resistance emerged in the early 20th century. [32] Resistance to quinine spurred the development of a broad array of antimalarial medications through the 20th century including chloroquine, proguanil, atovaquone, sulfadoxine/pyrimethamine, mefloquine, and artemisinin. [32] In all cases, parasites resistant to a given drug have emerged within a few decades of the drugs deployment. [32] To combat this, antimalarial drugs are frequently used in combination, with artemisinin combination therapies currently the gold standard for treatment. [33] In general, antimalarial drugs target the life stages of Plasmodium parasites that reside within vertebrate red blood cells, as these are the stages that tend to cause disease. [34] However, drugs targeting other stages of the parasite life cycle are under development in order to prevent infection in travelers and to prevent transmission of sexual stages to insect hosts. [35]

Insects

The mosquito Anopheles stephensi is among the blood-feeding insects that can be infected by a species of Plasmodium. Anopheles stephensi.jpeg
The mosquito Anopheles stephensi is among the blood-feeding insects that can be infected by a species of Plasmodium.

In addition to a vertebrate host, all Plasmodium species also infect a bloodsucking insect host, generally a mosquito (although some reptile-infecting parasites are transmitted by sandflies). Mosquitoes of the genera Culex , Anopheles , Culiseta , Mansonia and Aedes act as insect hosts for various Plasmodium species. The best studied of these are the Anopheles mosquitoes which host the Plasmodium parasites of human malaria, as well as Culex mosquitoes which host the Plasmodium species that cause malaria in birds. Only female mosquitoes are infected with Plasmodium, since only they feed on the blood of vertebrate hosts. [36] Different species affect their insect hosts differently. Sometimes, insects infected with Plasmodium have reduced lifespan and reduced ability to produce offspring. [37] Further, some species of Plasmodium appear to cause insects to prefer to bite infected vertebrate hosts over non-infected hosts. [37] [38] [39]

History

Charles Louis Alphonse Laveran first described parasites in the blood of malaria patients in 1880. [40] He named the parasite Oscillaria malariae. [40] In 1885, zoologists Ettore Marchiafava and Angelo Celli reexamined the parasite and termed it a member of a new genus, Plasmodium, named for the resemblance to the multinucleate cells of slime molds of the same name. [41] [notes 1] The fact that several species may be involved in causing different forms of malaria was first recognized by Camillo Golgi in 1886. [40] Soon thereafter, Giovanni Batista Grassi and Raimondo Filetti named the parasites causing two different types of human malaria Plasmodium vivax and Plasmodium malariae . [40] In 1897, William Welch identified and named Plasmodium falciparum . This was followed by the recognition of the other two species of Plasmodium which infect humans: Plasmodium ovale (1922) and Plasmodium knowlesi (identified in long-tailed macaques in 1931; in humans in 1965). [40] The contribution of insect hosts to the Plasmodium life cycle was described in 1897 by Ronald Ross and in 1899 by Giovanni Batista Grassi, Amico Bignami and Giuseppe Bastianelli. [40]

In 1966, Cyril Garnham proposed separating Plasmodium into nine subgenera based on host specificity and parasite morphology. [18] This included four subgenera that had previously been proposed for bird-infecting Plasmodium species by A. Corradetti in 1963. [42] [19] This scheme was expanded upon by Sam R. Telford in 1988 when he reclassified Plasmodium parasites that infect reptiles, adding five subgenera. [20] [18] In 1997, G. Valkiunas reclassified the bird-infecting Plasmodium species adding a fifth subgenus: Bennettinia. [19] [43]

See also

Notes

  1. ↑ The plural of Plasmodium is not Plasmodia. Instead multiple species of the genus are referred to as "Plasmodium species". [41]

Related Research Articles

<span class="mw-page-title-main">Apicomplexa</span> Phylum of parasitic alveolates

The Apicomplexa are organisms of a large phylum of mainly parasitic alveolates. Most possess a unique form of organelle structure that comprises a type of non-photosynthetic plastid called an apicoplast—with an apical complex membrane. The organelle's apical shape is an adaptation that the apicomplexan applies in penetrating a host cell.

<i>Plasmodium falciparum</i> Protozoan species of malaria parasite

Plasmodium falciparum is a unicellular protozoan parasite of humans, and the deadliest species of Plasmodium that causes malaria in humans. The parasite is transmitted through the bite of a female Anopheles mosquito and causes the disease's most dangerous form, falciparum malaria. It is responsible for around 50% of all malaria cases. P. falciparum is therefore regarded as the deadliest parasite in humans. It is also associated with the development of blood cancer and is classified as a Group 2A (probable) carcinogen.

<i>Plasmodium vivax</i> Species of single-celled organism

Plasmodium vivax is a protozoal parasite and a human pathogen. This parasite is the most frequent and widely distributed cause of recurring malaria. Although it is less virulent than Plasmodium falciparum, the deadliest of the five human malaria parasites, P. vivax malaria infections can lead to severe disease and death, often due to splenomegaly. P. vivax is carried by the female Anopheles mosquito; the males do not bite.

<i>Plasmodium knowlesi</i> Species of single-celled organism

Plasmodium knowlesi is a parasite that causes malaria in humans and other primates. It is found throughout Southeast Asia, and is the most common cause of human malaria in Malaysia. Like other Plasmodium species, P. knowlesi has a life cycle that requires infection of both a mosquito and a warm-blooded host. While the natural warm-blooded hosts of P. knowlesi are likely various Old World monkeys, humans can be infected by P. knowlesi if they are fed upon by infected mosquitoes. P. knowlesi is a eukaryote in the phylum Apicomplexa, genus Plasmodium, and subgenus Plasmodium. It is most closely related to the human parasite Plasmodium vivax as well as other Plasmodium species that infect non-human primates.

<i>Plasmodium berghei</i> Single celled parasite, rodent malaria

Plasmodium berghei is a single-celled parasite causing rodent malaria. It is in the Plasmodium subgenus Vinckeia.

Huffia is a subgenus of the genus Plasmodium - all of which are parasites. The subgenus was created in 1963 by Corradetti et al.. Species in this subgenus infect birds with malaria.

Plasmodium brumpti is a parasite of the genus Plasmodium subgenus Sauramoeba. As in all Plasmodium species, P. brumpti has both vertebrate and insect hosts. The vertebrate hosts for this parasite are reptiles.

Plasmodium circularis is a parasite of the genus Plasmodium subgenus Sauramoeba.

Plasmodium relictum is a species in the genus Plasmodium, subgenus Haemamoeba.

<i>Leucocytozoon</i> Genus of protists

Leucocytozoon is a genus of parasitic alveolates belonging to the phylum Apicomplexa.

Avian malaria is a parasitic disease of birds, caused by parasite species belonging to the genera Plasmodium and Hemoproteus. The disease is transmitted by a dipteran vector including mosquitoes in the case of Plasmodium parasites and biting midges for Hemoproteus. The range of symptoms and effects of the parasite on its bird hosts is very wide, from asymptomatic cases to drastic population declines due to the disease, as is the case of the Hawaiian honeycreepers. The diversity of parasites is large, as it is estimated that there are approximately as many parasites as there are species of hosts. As research on human malaria parasites became difficult, Dr. Ross studied avian malaria parasites. Co-speciation and host switching events have contributed to the broad range of hosts that these parasites can infect, causing avian malaria to be a widespread global disease, found everywhere except Antarctica.

Hematozoa is a subclass of blood parasites of the Apicomplexa clade. Well known examples include the Plasmodium spp. which cause malaria in humans and Theileria which causes theileriosis in cattle. A large number of species are known to infect birds and are transmitted by insect vectors. The pattern in which Haematozoa infect a host cell depends on the genera of the blood parasite. Plasmodium and Leucozytozoon displace the nucleus of the host cell so that the parasite can take control of the cell where as Hemoproteus completely envelops the nucleus in a host cell.

Plasmodium juxtanucleare is a species of parasite in the family Plasmodiidae. The vertebrate hosts for this parasite are birds.

<span class="mw-page-title-main">Haemosporida</span> Order of protists

The Haemosporida are an order of intraerythrocytic parasitic alveolates.

Plasmodium vaughani is a parasite of the genus Plasmodium, and the type species of the subgenus Novyella. As in all Plasmodium species, P. vaughani has both vertebrate and insect hosts. The vertebrate hosts for this parasite are birds.

<span class="mw-page-title-main">Apicomplexan life cycle</span> Apicomplexa life cycle

Apicomplexans, a group of intracellular parasites, have life cycle stages that allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a cellular variety with a distinct morphology and biochemistry.

Nycteria is a genus of protozoan parasites that belong to the phylum Apicomplexa. It is composed of vector-borne haemosporidian parasites that infect a wide range of mammals such as primates, rodents and bats. Its vertebrate hosts are bats. First described by Garnham and Heisch in 1953, Nycteria is mostly found in bat species where it feeds off the blood of their hosts and causes disease. Within the host, Nycteria develops into peculiar lobulated schizonts in parenchyma cells of the liver, similarly to the stages of Plasmodium falciparum in the liver. The vector of Nycteria has been hard to acquire and identify. Because of this, the life cycle of Nycteria still remains unknown and understudied. It has been suggested that this vector could be an arthropod other than a mosquito or the vector of most haemosporidian parasites.

<span class="mw-page-title-main">Vasily Danilewsky</span>

Vasily Lakovlevich Danilewsky was a Ukrainian physician, physiologist and parasitologist. He was professor of physiology at University of Kharkiv and then at Kharkiv Medical Institute. He helped to establish the Danilevsky Institute of Endocrine Pathology Problems which he directed until his death.

<i>Plasmodium cynomolgi</i> Species of single-celled organism

Plasmodium cynomolgi is an apicomplexan parasite that infects mosquitoes and Asian Old World monkeys. In recent years, a number of natural infections of humans have also been documented. This species has been used as a model for human Plasmodium vivax because Plasmodium cynomolgi shares the same life cycle and some important biological features with P. vivax.

References

  1. ↑ "CDC – Malaria Parasites – About". CDC: Malaria. U.S. Centers for Disease Control and Prevention. Retrieved 28 December 2015.
  2. 1 2 Zilversmit, M.; Perkins, S. "Plasmodium". Tree of Life Web Project. Retrieved 1 June 2016.
  3. ↑ Obado, Samson O; Glover, Lucy; Deitsch, Kirk W. (2016). "The nuclear envelope and gene organization in parasitic protozoa: Specializations associated with disease". Molecular and Biochemical Parasitology. 209 (1–2): 104–113. doi:10.1016/j.molbiopara.2016.07.008. PMID   27475118.
  4. 1 2 Jimenez-Ruiz, Elena; Morlon-Guyot, Juliette; Daher, Wassim; Meissner, Markus (2016). "Vacuolar protein sorting mechanisms in apicomplexan parasites". Molecular and Biochemical Parasitology. 209 (1–2): 18–25. doi:10.1016/j.molbiopara.2016.01.007. PMC   5154328 . PMID   26844642.
  5. ↑ Counihan, Natalie A.; Kalanon, Ming; Coppel, Ross L.; De Koning-Ward, Tania F. (2013). "Plasmodium rhoptry proteins: Why order is important". Trends in Parasitology. 29 (5): 228–36. doi:10.1016/j.pt.2013.03.003. PMID   23570755.
  6. 1 2 Kemp, Louise E.; Yamamoto, Masahiro; Soldati-Favre, Dominique (2013). "Subversion of host cellular functions by the apicomplexan parasites". FEMS Microbiology Reviews. 37 (4): 607–31. doi: 10.1111/1574-6976.12013 . PMID   23186105.
  7. 1 2 Sheiner, Lilach; Vaidya, Akhil B.; McFadden, Geoffrey I. (2013). "The metabolic roles of the endosymbiotic organelles of Toxoplasma and Plasmodium spp". Current Opinion in Microbiology. 16 (4): 452–8. doi:10.1016/j.mib.2013.07.003. PMC   3767399 . PMID   23927894.
  8. ↑ McFadden, Geoffrey Ian; Yeh, Ellen (2017). "The apicoplast: Now you see it, now you don't". International Journal for Parasitology. 47 (2–3): 137–144. doi:10.1016/j.ijpara.2016.08.005. PMC   5406208 . PMID   27773518.
  9. ↑ Dooren, Giel; Striepen, Boris (June 26, 2013). "The Algal Past and Parasite Present of the Apicoplast". Annual Review of Microbiology. 67: 271–289. doi:10.1146/annurev-micro-092412-155741. PMID   23808340.
  10. 1 2 Vernick, K.D.; Oduol, F.; Lazarro, B.P.; Glazebrook, J.; Xu, J.; Riehle, M.; Li, J. (2005). "Molecular Genetics of Mosquito Resistance to Malaria Parasites". In Sullivan, D; Krishna, S. (eds.). Malaria: Drugs, Disease, and Post-genomic Biology. Springer. p. 384. ISBN   978-3-540-29088-9.
  11. 1 2 3 "CDC – Malaria Parasites – Biology". CDC: Malaria. U.S. Centers for Disease Control and Prevention. Retrieved 28 December 2015.
  12. ↑ Markus, M. B. (2011). "Malaria: Origin of the Term 'Hypnozoite'". Journal of the History of Biology. 44 (4): 781–786. doi:10.1007/s10739-010-9239-3. PMID   20665090. S2CID   1727294.
  13. ↑ Vaughan, Ashley M.; Kappe, Stefan H. I. (2017). "Malaria Parasite Liver Infection and Exoerythrocytic Biology". Cold Spring Harbor Perspectives in Medicine. 7 (6): a025486. doi:10.1101/cshperspect.a025486. PMC   5453383 . PMID   28242785.
  14. ↑ Markus, M. B. (2022). "Theoretical origin of genetically homologous Plasmodium vivax malarial recurrences". Southern African Journal of Infectious Diseases. 37 (1): 369. doi:10.4102/sajid.v37i1.369. PMC   8991251 . PMID   35399558.
  15. ↑ Morrison, David A. (2009). "Evolution of the Apicomplexa: Where are we now?". Trends in Parasitology. 25 (8): 375–82. doi:10.1016/j.pt.2009.05.010. PMID   19635681.
  16. ↑ Votypka J. "Haemospororida Danielewski 1885". Tree of Life. Retrieved 1 May 2018.
  17. 1 2 3 4 5 6 Perkins, S. L. (2014). "Malaria's Many Mates: Past, Present, and Future of the Systematics of the Order Haemosporida". Journal of Parasitology. 100 (1): 11–25. doi:10.1645/13-362.1. PMID   24059436. S2CID   21291855.
  18. 1 2 3 Martinsen, E. S.; Perkins, S. L. (2013). "The Diversity of Plasmodium and other Haemosporidians: The Intersection of Taxonomy, Phylogenetics, and Genomics". In Carlton, J.M.; Perkins, S.L.; Deitsch, K.W. (eds.). Malaria Parasites: Comparative Genomics, Evolution and Molecular Biology. Caister Academic Press. pp. 1–15. ISBN   978-1908230072.
  19. 1 2 3 Valkiunas, Gediminas (2004). "Brief Historical Summary". Avian Malaria Parasites and Other Haemosporidia. CRC Press. pp. 9–15. ISBN   9780415300971.
  20. 1 2 Telford S (1988). "A contribution to the systematics of the reptilian malaria parasites, family Plasmodiidae (Apicomplexa: Haemosporina)". Bulletin of the Florida State Museum Biological Sciences. 34 (2): 65–96. Archived from the original on 2018-09-26. Retrieved 2014-03-25.
  21. ↑ Rich, S.; Ayala, F (2003). Progress in Malaria Research: the Case for Phylogenetics. Advances in Parasitology. Vol. 54. pp. 255–80. doi:10.1016/S0065-308X(03)54005-2. ISBN   978-0-12-031754-7. PMID   14711087.
  22. ↑ Martinsen ES, Perkins SL, Schall JJ (April 2008). "A three-genome phylogeny of malaria parasites (Plasmodium and closely related genera): Evolution of life-history traits and host switches". Molecular Phylogenetics and Evolution. 47 (1): 261–273. doi:10.1016/j.ympev.2007.11.012. PMID   18248741.
  23. 1 2 Manguin, S.; Carnevale, P.; Mouchet, J.; Coosemans, M.; Julvez, J.; Richard-Lenoble, D.; Sircoulon, J. (2008). Biodiversity of Malaria in the world. John Libbey. pp. 13–15. ISBN   978-2-7420-0616-8 . Retrieved 15 March 2018.
  24. ↑ Tatem AJ, Jia P, Ordanovich D, Falkner M, Huang Z, Howes R; et al. (2017). "The geography of imported malaria to non-endemic countries: a meta-analysis of nationally reported statistics". Lancet Infect Dis. 17 (1): 98–107. doi:10.1016/S1473-3099(16)30326-7. PMC   5392593 . PMID   27777030.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  25. 1 2 Scully, Erik J.; Kanjee, Usheer; Duraisingh, Manoj T. (2017). "Molecular interactions governing host-specificity of blood stage malaria parasites". Current Opinion in Microbiology. 40: 21–31. doi:10.1016/j.mib.2017.10.006. PMC   5733638 . PMID   29096194.
  26. ↑ Nunn, C., Altizer, S. (2006). Infectious Diseases in Primates: Behavior, Ecology and Evolution (1 ed.). Oxford University Press. pp. 253–254. ISBN   978-0198565840 . Retrieved 16 March 2018.{{cite book}}: CS1 maint: multiple names: authors list (link)
  27. ↑ Templeton TJ, Martinsen E, Kaewthamasorn M, Kaneko O (2016). "The rediscovery of malaria parasites of ungulates". Parasitology. 143 (12): 1501–1508. doi:10.1017/S0031182016001141. PMID   27444556. S2CID   22397021.
  28. 1 2 Valkiunas, Gediminas (2004). "Specificity and general Principles of Species Identification". Avian Malaria Parasites and Other Haemosporidia. CRC Press. pp. 67–81. ISBN   9780415300971.
  29. ↑ Valkiunas, Gediminas (2004). "General Section - Life Cycle and Morphology of Plasmodiidae Species". Avian Malaria Parasites and Other Haemosporidia. CRC Press. pp. 27–35. ISBN   9780415300971.
  30. ↑ Valkiunas, Gediminas (2004). "Pathogenicity". Avian Malaria Parasites and Other Haemosporidia. CRC Press. pp. 83–111. ISBN   9780415300971.
  31. 1 2 Zug, G. R.; Vitt, L. J., eds. (2012). Herpetology: An Introductory Biology of Amphibians and Reptiles. Academic Press. p. 152. ISBN   978-0127826202 . Retrieved 16 March 2018.
  32. 1 2 3 Blasco, Benjamin; Leroy, Didier; Fidock, David A. (2017). "Antimalarial drug resistance: Linking Plasmodium falciparum parasite biology to the clinic". Nature Medicine. 23 (8): 917–928. doi:10.1038/nm.4381. PMC   5747363 . PMID   28777791.
  33. ↑ Cowman, Alan F; Healer, Julie; Marapana, Danushka; Marsh, Kevin (2016). "Malaria: Biology and Disease". Cell. 167 (3): 610–624. doi: 10.1016/j.cell.2016.07.055 . PMID   27768886.
  34. ↑ Haldar, Kasturi; Bhattacharjee, Souvik; Safeukui, Innocent (2018). "Drug resistance in Plasmodium". Nature Reviews Microbiology. 16 (3): 156–170. doi:10.1038/nrmicro.2017.161. PMC   6371404 . PMID   29355852.
  35. ↑ Poonam; Gupta, Yash; Gupta, Nikesh; Singh, Snigdha; Wu, Lidong; Chhikara, Bhupender Singh; Rawat, Manmeet; Rathi, Brijesh (2018). "Multistage inhibitors of the malaria parasite: Emerging hope for chemoprotection and malaria eradication". Medicinal Research Reviews. 38 (5): 1511–1535. doi:10.1002/med.21486. PMID   29372568. S2CID   25711437.
  36. ↑ Crompton, Peter D.; Moebius, Jacqueline; Portugal, Silvia; Waisberg, Michael; Hart, Geoffrey; Garver, Lindsey S.; Miller, Louis H.; Barillas-Mury, Carolina; Pierce, Susan K. (2014). "Malaria Immunity in Man and Mosquito: Insights into Unsolved Mysteries of a Deadly Infectious Disease". Annual Review of Immunology. 32 (1): 157–187. doi:10.1146/annurev-immunol-032713-120220. PMC   4075043 . PMID   24655294.
  37. 1 2 Busula, Annette O.; Verhulst, Niels O.; Bousema, Teun; Takken, Willem; De Boer, Jetske G. (2017). "Mechanisms of Plasmodium -Enhanced Attraction of Mosquito Vectors". Trends in Parasitology. 33 (12): 961–973. doi:10.1016/j.pt.2017.08.010. PMID   28942108.
  38. ↑ Stanczyk, Nina M.; Mescher, Mark C.; De Moraes, Consuelo M. (2017). "Effects of malaria infection on mosquito olfaction and behavior: Extrapolating data to the field". Current Opinion in Insect Science. 20: 7–12. doi: 10.1016/j.cois.2017.02.002 . PMID   28602239.
  39. ↑ Mitchell, Sara N.; Catteruccia, Flaminia (2017). "Anopheline Reproductive Biology: Impacts on Vectorial Capacity and Potential Avenues for Malaria Control". Cold Spring Harbor Perspectives in Medicine. 7 (12): a025593. doi:10.1101/cshperspect.a025593. PMC   5710097 . PMID   28389513.
  40. 1 2 3 4 5 6 "The History of Malaria, an Ancient Disease". U.S. Centers for Disease Control and Prevention. Retrieved 31 May 2016.
  41. 1 2 McFadden, G. I. (2012). "Plasmodia – don't". Trends Parasitol. 28 (8): 306. doi:10.1016/j.pt.2012.05.006. PMID   22738856.
  42. ↑ Corradetti A.; Garnham P.C.C.; Laird M. (1963). "New classification of the avian malaria parasites". Parassitologia. 5: 1–4.
  43. ↑ Valkiunas, G. (1997). "Bird Haemosporidia". Acta Zoologica Lituanica. 3–5: 1–607. ISSN   1392-1657.

Further reading

Identification

Biology

History

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.