Infectious agents

Articles

• 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 (...)

• Mycobacterium sp.
  23 April 2004

  mycobacteria, mycobacterias

• Candida sp.
  4 May 2004

  Adj. candidal

• 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 (...)

• Rhizopus sp.
  18 January 2007

  See also
  Mucor sp.

• Streptococcus pneumoniae
  3 March 2006

  References
  Cundell DR, Gerard C, Idanpaan-Heikkila I, Tuomanen EI, Gerard NP. PAf receptor anchors Streptococcus pneumoniae to activated human endothelial cells. Adv Exp Med Biol. 1996;416:89-94. PMID: #9131132#

• Pseudomonas aeruginosa
  4 June 2004

  Adj. pseudomonal

• Isospora belli
  21 May 2008

  Definition: Isospora belli and related speces are more often seen in the small intestine than the colon. They appear as perinuclear and subnuclear intraepithelial inclusions. Sometimes, organisms can be found in the lamina propria in macrophages.
  Images
  Cytology https://twitter.com/ParasiteGal/status/881921791928741888
  Isospora belli in intestinal epithelium https://twitter.com/RMeunierMD/status/558389642391994368 https://twitter.com/UTSW_GIpath/status/861605901966471169
  The (...)

• Hantavirus
  4 June 2004

  Hantaviruses are tri-segmented negative sense single stranded RNA viruses that belong to the family Bunyaviridae. In nature, hantaviruses are exclusively maintained in the populations of their specific rodent hosts.
  In their natural host species, hantaviruses usually develop a persistent infection with prolonged virus shedding in excreta. Humans become infected by inhaling virus contaminated aerosol.
  Unlike asymptomatic infection in rodents, hantaviruses cause two acute febrile diseases (...)

• 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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