Infectious diseases

Articles

• syphilis
  18 October 2005

  Definition: Treponema pallidum subspecies pallidum is the microaerophilic spirochete that causes syphilis, a chronic venereal disease with multiple clinical presentations.
  Images
  Primary syphilis - Chancre
  https://twitter.com/JHW806/status/733298742502129666
  Secondary syphilis: psoriasiform pattern + lichenoid infiltrate with histiocytes great clue. Plasma cells ++ plasmacytic infiltration.
  https://twitter.com/JRamirezMD/status/782747788907991040 (...)

• tetanus
  15 March 2009

  Tetanus, also called lockjaw, is a medical condition characterized by a prolonged contraction of skeletal muscle fibers. The primary symptoms are caused by tetanospasmin, a neurotoxin produced by the Gram-positive, obligate anaerobic bacterium Clostridium tetani.
  Infection generally occurs through wound contamination, and often involves a cut or deep puncture wound. As the infection progresses, muscle spasms in the jaw develop, hence the name lockjaw. This is followed by difficulty in (...)

• lymphogranuloma venereum
  8 February 2005

  Lymphogranuloma venereum is a sexually transmitted disease and is caused by certain immunotypes of Chlamydia trachomatis.
  Synopsis
  genital ulcers
  ulcerous proctitis
  rectitis follicular lymphohistiocytic-plasmacytic infiltration in the submucosa, muscularis propria, and serosa neuromatous hyperplasia in the submucosal and myenteric plexuses extensive thickening and fibrosis of the bowel wall
  lymphogranuloma venereum proctocolitis
  inguinal syndrome with penoscrotal elephantiasis (...)

• nocardiosis
  4 October 2012

  Digital case
  JRC:427 : Pulmonary nocardiosis.
  Definition: Infection by baceria of the genus Nocardia sp.
  See also
  bacterial infections

• granuloma inguinale
  10 October 2007

  Donovanosis

• tuberculosis
  22 August 2004

  Digital case
  HPC:154 : Mycobacterial adenitis
  Links
  Tuberculosis in The Yale Rosen Collection of Pulmonary Pathology on Flickr
  Localization
  pulmonary tuberculosis
  SNC tuberculosis
  meningeal tuberculosis (tuberculous meningitis )
  cerebral tuberculosis
  synovial tuberculosis
  tenosynovial tunerculosis (tuberculous tenosynovitis )
  renal tuberculosis
  serous tuberculosis
  pleural tuberculosis
  pericardial tuberculosis
  peritoneal tuberculosis
  genital tuberculosis
  tubal (...)

• aspergillus vasculitis
  18 November 2005

  See also
  Aspergillus invasive aspergillosis
  Vasculitis infectious vasculitis

• pulmonary histoplasmosis
  19 October 2005

  Definition: Pulonary fungal infections due to Histoplasma capsulatum.
  Most examples of pulmonary histoplasmosis, including histoplasmoma and chronic histoplasmosis, are characterized by typical necrotizing granulomatous inflammation.
  Only disseminated histoplasmosis is recognized as causing a different reaction which consists of ingestion of organisms by macrophages without granuloma formation.
  Synopsis
  bronchocentric granulomatosis
  fibrosing granuloma
  necrotizing granuloma (...)

• leprosy
  17 March 2009

  Digital slides
  UI: - Tuberculoid leprosy.
  JRC:568 : Cutaneous leprosy.
  Image
  acid fast bacilli ( AFB )
  image : https://twitter.com/tejaspatel_dr/status/725713110238121984
  Encased neurovascular bundle. lepromatous leprosy
  https://twitter.com/SGottesmanMD/status/817527999880974336
  Definition: Leprosy, or Hansen disease, is a slowly progressive infection caused by Mycobacterium leprae, affecting the skin and peripheral nerves and resulting in disabling deformities.
  Mycobacterium (...)

• parasitic gastritis
  10 November 2005

  Images
  gastric anisakiasis
  http://www.nejm.org/doi/full/10.1056/NEJMicm1509451
  The stomach is not a preferred site for human parasitic infections. Cryptosporidium spp. has been found lining the gastric mucosa, which was virtually free of inflammation.
  Several cases of giardiasis have been reported, virtually all in stomachs with extensive atrophy and intestinal metaplasia.
  Because most patients also have H. pylori infection, it remains unclear whether Giardia intestinalis causes (...)

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