Dysentery (formerly known as flu or the bloody flu) is an inflammatory disorder of the intestine, especially of the colon, that results in severe diarrhea containing mucus and/or blood in the feces. If left untreated, dysentery can be fatal.Dysentery is usually caused by a bacterial or protozoan infection or infestation of parasitic worms, but can also be caused by a chemical irritant or viral infection. The most common cause of the disease in developed countries is infection with a bacillus of the Shigella group (causing bacillary dysentery). Infection with the amoeba Entamoeba histolytica, can cause amoebic dysentery. This is more common in tropical areas, although has been found throughout the United States
Bacillary dysentery Amoebic dysentery Incubation period Short < 1 week Long 3 weeks or more Onset Acute Insidious Occurrence Epidemic Endemic Fever Common Only incomplications Clinical picture "Lying-down dysentery" "Walking dysentery" Tenderness Whole abdomen More localized (sigmoid) Tenesmus Very sever Not usual Stools Macroscopic Mucus and blood only Stools with blood and mucus Microscopic Numerous red cells Numerous polymorphs. Few bacteria. Macrophages. Numerous clumped red cells. Polymorphs scanty. Many bacteria E. histolitica trophozoites with ingested red cells.
clinical differentiiation of pyogenic and amoebic liver abscess is difficult . in case of pyogenic liver abscess the patient presents with abdominal pain and fever with chills .. the cbp shows elevated leucocyte counts with neutrophilia .. amoebic liver abscess abdominal pain is present noot associated with fever and chills .. dysentry is usually present in amoebic liver abscess..
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