background shiga toxin-producing escherichia coli (stec) strains are considered as one of the most important widespread food-borne pathogens, which cause diarrhea and life threatening diseases, such as hemolytic uremic syndrome, in humans. more recently, the stec strains have also been incriminated to cause diarrhea and hemorrhagic colitis in calves; enteropathogenic e. coli (epec) also causes ...

background : cryptosporidium is an intracellular apicomplexan parasite that infects a wide range of vertebrates including humans. cryptosporidiosis is a major cause of diarrhea in children with and without human immunodeficiency virus (hiv) infection in developing countries. more recently, the molecular methods for identification of morphologically indistin­guishable species have been developed...

diarrheal disease is one of the main causes of death in developing countries. this study was performed to the prevalence of bacterial causes of diarrhea in patients admitted to the military hospitals and imam khomeini medical center hospital. this cross-sectional study was conducted in a period of 9 months from june 2014 to february 2015, 435 non-duplicative diarrheal stool samples were collect...

background: aeromonashydrophila (a. hydrophila) is an aquatic bacterium that can cause a spectrum of infectious diseases, including both gastrointestinal and extraintestinal infections. due to the high rate of diarrheal infections in pediatric patients in central iran, this study was designed to determine the frequency of a. hydrophila in diarrhea samples from children in this region. methods: ...

a rapid and sensitive reverse transcription polymerase chain reaction (rt-pcr) and nested-pcr were used to detect bovine viral diarrhea virus 1 (bvdv-1) in bull semen. selected primers could amplify a part of the 5´utr of the bvdv genome. a 294 bp dna fragment was amplified and specificity of the results was confirmed by direct sequencing of the pcr product. prior to rna extraction, the seminal...

background diarrhea is the most frequent health problem among children in developing countries. defining the etiology of acute diarrhea is critical to disease therapy and prevention. some anaerobic bacteria such as enterotoxigenic bacteroides fragilis (etbf) strains cause diarrheal disease by production of enterotoxin in children less than 5 years old. objectives this study aimed to evaluate th...

cronkhite-canada syndrome (ccs) is a rare, non-familial disorder of unknown etiology associated with alopecia, cutaneous hyperpigmentation, gastrointestinal polyposis, onychodystrophy, diarrhea, weight loss and abdominal pain.the prevalence ofâ gastrointestinal malignancy in ccs patients is about 13%, and especially is high in colorectal and gastric areas; 5 year mortality rate is 55%. in this ...