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 (...)

• 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. (...)

• Candida sp.
  4 May 2004

  Adj. candidal

• Giardia
  10 March 2011

  Lamblia
  Definition: Giardia lamblia (synonymous with Lamblia intestinalis and Giardia duodenalis) is a flagellated protozoan parasite that colonizes and reproduces in the small intestine, causing giardiasis / lambliasis .
  Images
  Giardia / lamblia
  https://twitter.com/JMGardnerMD/status/764512091449417728
  https://twitter.com/Konzult_/status/796219284204777472
  https://twitter.com/DraEosina/status/839144503290302464
  Digital cases
  Case 40 (HPC:40) : Duodenal lambliasis (Duodenal (...)

• Pseudomonas aeruginosa
  4 June 2004

  Adj. pseudomonal

• viruses
  29 January 2006

  WKP
  List of viruses
  Viruses are obligate intracellular parasites that depend on the host cell’s metabolic machinery for their replication. They consist of a nucleic acid genome surrounded by a protein coat (called a capsid) that is sometimes encased in a lipid membrane.
  Viruses are classified by their nucleic acid genome (DNA or RNA but not both), the shape of the capsid (icosahedral or helical), the presence or absence of a lipid envelope, their mode of replication, the preferred cell (...)

• Arenavirus
  2 January 2006

  Arenaviruses merit significant attention both as tractable model systems to study acute and persistent viral infections, and as clinically important human pathogens.
  Evidence indicates that LCMV remains present in the USA and Europe and capable of causing significant morbidity in infected individuals, likely being a neglected human pathogen.
  Moreover, new arenaviruses are being discovered in the Americas on the average of one every three years, with some of them causing severe hemorrhagic (...)

• 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 (...)

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