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 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 (...)

• Sarcoptes scabiei
  25 January 2005

  Images
  Biopsy of a pruritic rash on her foot of a girl. Scabies https://twitter.com/ERDENEROZER/status/742420655405207552
  Pathology
  scabies
  See also
  arthropods arachnids acari Sarcoptes sp. Sarcoptes scabiei

• Rhizomucor pusillus
  30 August 2007

  Pathology
  Rhizomycosis infections (rhizomycoses)
  See also
  zygomycoses (mucormycoses)
  Rhizomucor sp.
  Rhizomucor miehei
  Rhizopus oryzae (#16882613#)
  References
  Iwen PC, Freifeld AG, Sigler L, Tarantolo SR. Molecular identification of Rhizomucor pusillus as a cause of sinus-orbital zygomycosis in a patient with acute myelogenous leukemia. J Clin Microbiol. 2005 Nov;43(11):5819-21. PMID: #16272531#
  Ma B, Seymour JF, Januszewicz H, Slavin MA. Cure of pulmonary Rhizomucor pusillus (...)

• Plasmodium falciparum
  15 July 2007

  P. falciparum causes more severe disease than the other Plasmodium species do.
  Several features of P. falciparum account for its greater pathogenicity:
  P. falciparum is able to infect red blood cells of any age, leading to high parasite burdens and profound anemia. The other species infect only new or old red blood cells, which are a smaller fraction of the red blood cell pool.
  P. falciparum causes infected red blood cells to clump together (rosetting) and to stick to endothelial cells (...)

• HPV-18
  14 June 2007

  See also
  HPVs
  HPV-18/MYC amplicon
  References
  Conti C, Herrick J, Bensimon A. Unscheduled DNA replication origin activation at inserted HPV 18 sequences in a HPV-18/MYC amplicon. Genes Chromosomes Cancer. 2007 Apr 19;46(8):724-734 PMID: #17444495#

• Naegleria fowleri
  18 September 2007

  Pathology
  amebic meningoencephalitis
  Images
  Naegleria fowleri amoeba in brain. Small trophozoites, pale nucleus https://twitter.com/TheUSCAP/status/763176116131475456
  References
  Visvesvara GS, Moura H, Schuster FL. Pathogenic and opportunistic free-living amoebae: Acanthamoeba spp., Balamuthia mandrillaris, Naegleria fowleri, and Sappinia diploidea. FEMS Immunol Med Microbiol. 2007 Jun;50(1):1-26. PMID: #17428307#
  Grate I Jr. Primary amebic meningoencephalitis: a silent killer. (...)

• 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 (...)

• Rhizomucor sp.
  30 August 2007

  Examples
  Rhizomucor miehei
  Rhizopus oryzae (#16882613#)
  Rhizomucor pusillus (#16272531#)
  Pathology
  Rhizomycosis infections (rhizomycoses)
  See also
  zygomycoses (mucormycoses)
  References
  McGuire FR, Grinnan DC, Robbins M. Mucormycosis of the bronchial anastomosis: a case of successful medical treatment and historic review. J Heart Lung Transplant. 2007 Aug;26(8):857-61. PMID: #17692792#
  Yu J, Li RY. Primary renal zygomycosis due to Rhizopus oryzae. Med Mycol. 2006 (...)

• Amoeba sp.
  9 March 2007

  WKP
  Pathology
  amoebiasis
  See also
  infectious agents

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