Edwardsiella ictaluri | |
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Scientific classification | |
Domain: | Bacteria |
Phylum: | Pseudomonadota |
Class: | Gammaproteobacteria |
Order: | Enterobacterales |
Family: | Hafniaceae |
Genus: | Edwardsiella |
Species: | E. ictaluri |
Binomial name | |
Edwardsiella ictaluri Hawke & al., 1981 [1] | |
Edwardsiella ictaluri (also known as enteric septicaemia of catfish, hole in the head disease [2] and ESC) is a member of the family Hafniaceae. The bacterium is a short, gram negative, pleomorphic rod with flagella. It causes the disease enteric septicaemia of catfish (ESC), which infects a variety of fish species (including many catfish species, knifefish and barbs). The bacteria can cause either acute septicaemia or chronic encephalitis in infected fish. Outbreaks normally occur in spring and autumn.
Edwardsiella ictaluri can be found in Asia and the United States, being of particular economic importance in the U.S. It is not a zoonosis.
Acute ESC infection causes an acute septicaemia that presents as multiple petechial haemorrhages that develop into depigmented ulcers. Additional clinical signs include abnormal behavior, exophthalmos, hemorrhagic gastroenteritis, edema and ascites. Chronic ESC infection causes a chronic encephalitis. Clinical signs include abnormal behavior, abnormal swimming patterns, swelling and ulceration of the head and death.
Any fish that survive the infection become latent carriers of the disease.
A presumptive diagnosis can be made based on the clinical signs alone but PCR, indirect immunofluorescence, bacterial culture and ELISA can be used to definitively diagnose the disease.
Several antibiotics can be used to treat the disease, but there are reports of resistance emerging. Vaccination can be used to prevent disease. Management factors such as reducing stocking density and stress should be considered.
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Infective endocarditis is an infection of the inner surface of the heart, usually the valves. Signs and symptoms may include fever, small areas of bleeding into the skin, heart murmur, feeling tired, and low red blood cell count. Complications may include backward blood flow in the heart, heart failure – the heart struggling to pump a sufficient amount of blood to meet the body's needs, abnormal electrical conduction in the heart, stroke, and kidney failure.
Pyelonephritis is inflammation of the kidney, typically due to a bacterial infection. Symptoms most often include fever and flank tenderness. Other symptoms may include nausea, burning with urination, and frequent urination. Complications may include pus around the kidney, sepsis, or kidney failure.
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Bacterial cold water disease (BCWD) is a bacterial disease of freshwater fish, specifically salmonid fish. It is caused by the bacterium Flavobacterium psychrophilum, a psychrophilic, gram-negative rod-shaped bacterium of the family Flavobacteriaceae. This bacterium is found in fresh waters with the optimal growth temperature below 13°C, and it can be seen in any area with water temperatures consistently below 15°C. Salmon are the most commonly affected species. This disease is not zoonotic.
Contagious caprine pleuropneumonia (CCPP) is a cause of major economic losses to goat producers in Africa, Asia and the Middle East.
Edwardsiella tarda is a member of the family Hafniaceae. The bacterium is a facultatively anaerobic, small, motile, gram negative, straight rod with flagella. Infection causes Edwardsiella septicemia in channel catfish, eels, and flounder. Edwardsiella tarda is also found in largemouth bass and freshwater species such as rainbow trout. It is a zoonosis and can infect a variety of animals including fish, amphibians, reptiles, and mammals. Edwardsiella tarda has also been the cause of periodic infections for various animals within zoos. E. tarda has a worldwide distribution and can be found in pond water, mud, and the intestine of fish and other marine animals. It is spread by carrier animal feces.
Cardiovirus A is a member of the Picornaviridae family. Infection with the virus causes encephalomyocarditis and reproductive disease in pigs. Although a variety of mammals may host the virus, pigs are classed as the domestic host as they are most easily infected. It is thought to be spread by rodents.
Epizootic ulcerative syndrome (EUS), also known as mycotic granulomatosis (MG) or red spot disease (RSD), is a disease caused by the water mould Aphanomyces invadans. It infects many freshwater and brackish fish species in the Asia-Pacific region and Australia. The disease is most commonly seen when there are low temperature and heavy rainfall in tropical and sub-tropical waters.
Mycoplasma hyorhinis is a species of bacteria in the Mycoplasmataceae family. It is often found as a commensal in the respiratory tract of pigs, and rarely in the skin of humans. M. hyorhinis is thought to facilitate and exacerbate the development of diseases such as porcine enzootic pneumonia and porcine reproductive and respiratory syndrome (PRRS). Rarely, it may cause mycoplasma arthritis, mycoplasmal polyserositis or mycoplasma septicaemia in piglets without the involvement of other bacteria. This presents as polyarthritis or polyserositis.
Mycoplasma synoviae is a species of bacterium in the genus Mycoplasma. It causes disease in the joints, bones and respiratory system of birds. It is found throughout the world and infection may be referred to as infectious synovitis, avian mycoplasmosis, infectious sinusitis, or mycoplasma arthritis. It is of economic importance because infection can cause a drop in egg production. The disease is most commonly seen in chickens, and transmission occurs both vertically and horizontally.
Riemerella anatipestifer is a member of the Flavobacteriaceae family. It is a Gram-negative bacterium that causes septicaemia and death in young ducks and geese throughout the world. There are 21 known serotypes and infection is spread horizontally between birds. Infection may be referred to as Duck Septicaemia, Goose 'flu, Riemerellosis, New Duck Disease and Polyserositis.
Actinobacillus suis is a beta-haemolytic, Gram-negative bacterium of the family Pasteurellaceae. The bacterium has many strains and is the pathogen responsible for actinobacillosis in pigs of all ages. It can also infect wild birds, domestic ruminants, dogs, cats, and horses. The organism can be found in the respiratory tract and tonsils of both infected and healthy pigs that act as carriers. Transmission is via the respiratory tract and piglets are usually infected early on in life. Herds with a high health status are more at risk and outbreaks can be explosive.
Ictalurid herpesvirus 1 (IcHV-1) is a species of virus in the genus Ictalurivirus, family Alloherpesviridae, and order Herpesvirales. It causes disease in channel catfish and blue catfish, and can cause significant economic loss in catfish farms. The disease is endemic in the USA and there are reports of the virus in Honduras and Russia.