Infectious agents

Articles

• parainfluenza
  11 June 2003

  Para-influenza 1, 2, 3

• Acanthamoeba sp.
  6 September 2007

  WKP
  Definition: Acanthamoeba species are known to cause 2 well-described entities: (1) granulomatous amoebic encephalitis (GAE), which usually affects immunocompromised hosts, and (2) keratitis, which typically follows trauma associated with contamination of water or contact lenses. Less common manifestations include pneumonitis and a subacute granulomatous dermatitis.
  Images
  subacute granulomatous dermatitis by Acanthamoeba in a cardiac transplant patient ; cyst form and trophozoite (...)

• Scedosporium apiospermum
  19 October 2005

  Pathology
  scedosporiosis pulmonary scedosporiosis (#9868657#) invasive pulmonary infection due to Scedosporium apiospermum
  Predispsoing factors
  chronic granulomatous disease (#9868657#)

• Trypanosoma cruzi
  23 April 2004

  Definition: Trypanosoma cruzi is endemic in Central and South America with 16-18 million infected persons and 100 million persons living in conditions at risk of infection.
  Images
  american trypanosomiasis. Acute-phase Chagas w/ many parasites forming intracytoplasmic perinuclear pseudocysts. Trypanosoma cruzi via Reduviidae bug.
  https://twitter.com/EMadrigalDO/status/849365548462952448
  Persons become infected by the deposition of trypanosome-contaminated feces by infested triatomid (...)

• Cryptococcus neoformans
  29 August 2005

  Torula histolytica
  Definition: Cryptococcus neoformans (formerly known as Torula histolytica) is an encapsulated yeast-like fungus found in dried avian (particularly pigeon) and bat excreta, and in dust contaminated with such droppings.
  Images
  Cryptococcus disseminated to lung, spleen, kidney, thyroid.
  https://twitter.com/JMGardnerMD/status/866107567046610945
  granuloma with Cryptococcus neoformans
  https://twitter.com/smlungpathguy/status/877392725959749632
  Digital cases
  HPC:62 (...)

• Trichinella spiralis
  17 March 2009

  Digital slides
  UI:654 - Trichinosis
  UI:975 - Trichinosis
  Definition: Trichinella spiralis is a nematode parasite that is acquired by ingestion of larvae in undercooked meat from pigs that have themselves been infected by eating T. spiralis-infected rats or pork.
  In the United States, the number of T. spiralis-infected pigs has been greatly reduced by laws requiring cooking of hog food, and this has reduced the number of reported human infections in the United States to about 100 each (...)

• Schistosoma mansoni
  11 March 2009
• nematodes
  9 December 2004

  Exemples
  filariasis
  Enterobius vermicularis (Pinworms/Thread worms)
  Trichuris trichiura (Whipworm)
  Synopsis
  eosinophilic ileocolitis
  Videos
  Enterobius vermicularis (Pinworms/Thread worms) in a colon
  Trichuris trichiura in the caecum
  See also
  helminths nematodes
  Enterobius sp. Enterobius vermicularis Enterobius gregorii

• Staphylococcus aureus
  5 February 2006

  Staphylococcus aureus organisms are pyogenic, nonmotile, Gram-positive cocci that form grapelike clusters. These bacteria cause a myriad of skin lesions (boils, carbuncles, impetigo, and scalded skin) and also cause osteomyelitis, pneumonia, endocarditis, food poisoning, and toxic shock syndrome (TSS).
  Staphylococcus aureus organisms are pyogenic, nonmotile, Gram-positive cocci that form grapelike clusters. These bacteria cause a myriad of skin lesions (boils, carbuncles, impetigo, and (...)

• Aspergillus sp.
  9 June 2004

  Aspergillus is common and widespread in nature and are most often found when crops are exposed to a high humidity environment over a long period of time or are damaged in stressful conditions such as drought, a condition which lowers the barrier to entry.
  The native habitat of Aspergillus is in soil, decaying vegetation, hay, and grains undergoing microbiological deterioration and it invades all types of organic substrates whenever and wherever the conditions are favorable for its growth. (...)

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