Infectious agents

Articles

• Mycobacterium avium intracellulare
  20 July 2007

  Mycobacterium Avium-Intracellulare Complex
  Definition: Mycobacterium avium (which includes three subspecies) and Mycobacterium intracellulare are separate species, but the infections they cause are so similar that they are simply referred to as Mycobacterium avium-intracellulare complex, or MAC.
  Images
  hepatic MAI infection
  https://twitter.com/GIPathologyURMC/status/765234005474181120
  Mycobacterium avium complex enteritis
  https://twitter.com/ARP_Press/status/852288984034287617 (...)

• 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 (...)

• Candida sp.
  4 May 2004

  Adj. candidal

• Rhizopus sp.
  18 January 2007

  See also
  Mucor sp.

• Mycobacterium sp.
  23 April 2004

  mycobacteria, mycobacterias

• 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. (...)

• 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 (...)

• Schistosoma sp.
  4 May 2004

  Definition: Schistosoma are infectious agents of schistosomiasis.
  There are 5 principal species that infect man which can be classified by the appearance of the egg:
  Eggs w/ terminal spine: Schistosoma haemotobium, Schistosoma intercalatum
  Eggs w/ lateral spine: Schistosoma mansoni
  Round/ovoid, minutely spined: Schistosoma japonicum, Schistosoma mekongi
  They are members of the group of worms called flukes. However, the schistosomes have the following differences:
  Sexes are (...)

• helminths
  24 November 2004

  Parasitic worms are highly differentiated multicellular organisms. Their life cycles are complex; most alternate between sexual reproduction in the definitive host and asexual multiplication in an intermediary host or vector.
  Thus, depending on parasite species, humans may harbor either adult worms (e.g., Ascarus lumbricoides) or immature stages (e.g., Toxocara canis) or asexual larval forms (e.g., Echinococcus species).
  Once adult worms take up residence in humans, they do not multiply (...)

• Mansonella ozzardi
  9 December 2004

  See also
  filariasis
  helminthiasis

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