Diaporthe toxica

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Diaporthe toxica
Scientific classification Red Pencil Icon.png
Kingdom: Fungi
Division: Ascomycota
Class: Sordariomycetes
Order: Diaporthales
Family: Diaporthaceae
Genus: Diaporthe
Species:
D. toxica
Binomial name
Diaporthe toxica
P.M. Williamson et al, Mycological Research 98(12): 1367 (1994)

Diaporthe toxica (anamorph Phomopsis sp. formerly P. leptostromiformis var. leptostromiformis) [1] is a lupin endophyte and occasionally a plant pathogen. The fungus produces secondary metabolites that result in toxicosis of animals such as lupinosis of sheep when infected lupins are ingested by animals. The fungus produces mycotoxins called phomopsins, which cause liver damage. Lupinosis has been incorrectly attributed to Diaporthe woodii but has now been shown to be a mycotoxicosis caused by the recently discovered (1994) teleomorphic fungus Diaporthe toxica. [2] The discovery and naming of this fungus concludes over a century of investigation into the cause of lupinosis since the first major outbreak in Germany in 1872. The infection process and life cycle in both resistant and susceptible lupins has been fully elucidated. [3] This is the first record of resistance in a latent infection. Following this research rapid molecular breeding techniques have been developed leading to the production of many resistant lupin varieties. Lupinosis is no longer considered a disease of major importance to livestock producers in Western Australia. [4] Lupins can now become part of the human diet.

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<i>Sporothrix schenckii</i> Species of fungus

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<i>Diaporthe helianthi</i> Species of fungus

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Staphylococcus schleiferi is a Gram-positive, cocci-shaped bacterium of the family Staphylococcaceae. It is facultatively anaerobic, coagulase-variable, and can be readily cultured on blood agar where the bacterium tends to form opaque, non-pigmented colonies and beta (β) hemolysis. There exists two subspecies under the species S. schleiferi: Staphylococcus schleiferi subsp. schleiferi and Staphylococcus schleiferi subsp. coagulans.

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<i>Rhinocladiella mackenziei</i> Species of fungus

Rhinocladiella mackenziei is a deeply pigmented fungus that is a common cause of human cerebral phaeohyphomycosis. Rhinocladiella mackenziei was believed to be endemic solely to the Middle East, due to the first cases of infection being limited to the region. However, cases of R. mackenziei infection are increasingly reported from regions outside the Middle East. This pathogen is unique in that the majority of cases have been reported from immunologically normal people.

Pithomyces chartarum is a fungus predominantly found in subtropical countries and other localities with warmer climates. However, it occurs throughout the world including the United Kingdom, Europe and Netherlands. Pithomyces chartarum produces a mycotoxin called sporidesmin when it grows on plants, particularly grasses. Presence of the toxin in forage grasses causes facial eczema in sheep, and is especially problematic in areas such as New Zealand where sheep are intensively raised. Other health effect of P. chartarum are not well understood.

References

  1. Shivas et al (1991) Infraspecific variation demonstrated in Phomopsis leptostromiformis using cultural and biochemical techniques
  2. Williamson et al. (1994) Diaporthe toxica sp. nov., The cause of lupinosis in sheep. Mycological Research, 98 (12): 1367
  3. Williamson et al. (1991) Formation of subcuticular coralloid hyphae by Phomopsis leptostromiformis (sp. nov. Diaporthe toxica). Plant Disease, 75:1023-1026
  4. Allen (2009) Lupinosis in Western Australia, Australian Veterinary History Record, pp 13-17.