a rapid and simple technique for diagnosis of rotaviral diarrhea is polyacrylamide gel electrophoresis (page) of dsrna extracted from fecal samples. to determine the electrophoretype of iranian calf rotavirus, 23 rotaviral positive fecal samples from diarrheic holstein calves at the age of less than one month in tehran region were examined. the viral dsrna was extracted with phenol-chloroform, ...

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:neonatal calf diarrhea (ncd), also known ascalf scours, is caused by viruses, bacteria, and parasites.coronavirus is one of the important causes of ncd syndrome.electron microcopy has been used for demonstration of virusesin fecal samples of diarrheic calves since 1969. objectives:the aim of this study was to determine the prevalence ofcoronavirus in fecal samples of neonatal calf di...

Polyacrylamide gel electrophoretic analysis of purified preparations of human and calf diarrhea viruses indicated eight polypeptide components, or possibly nine in the case of the calf diarrhea virus. Thermal denaturation and analytical studies of the calf diarrhea virus genome showed it to consist of 11 double-stranded segments of RNA. The placing of the human and calf diarrhea viruses togethe...

Calf diarrhea is a commonly reported disease in young animals, and still a major cause of productivity and economic loss to cattle producers worldwide. In the report of the 2007 National Animal Health Monitoring System for U.S. dairy, half of the deaths among unweaned calves was attributed to diarrhea. Multiple pathogens are known or postulated to cause or contribute to calf diarrhea developmen...

Passively acquired antibodies through colostrum will protect calves against etiological agents of neonatal calf diarrhea. Among them enteric diseases due to strains of Enterotoxigenic Escherichia coli (ETEC) are the most commonly occurring form of colibacillosis in newborn calves. Specific antibodies against whole ETEC cells and total immunoglobulin G in dam serum, colostrum and calf serum were...

background: calf diarrhea is an important disease that is caused by different pathogens including bacteria, virus and parasites and is associated with economic losses. objectives: in this study, we evaluated the antibacterial activities of zatacin (z. multiflora aerial part ethanol extract), colistin, co-trimoxazole and enrofloxacin against clinical isolates of salmonella sp, e. coli and campyl...

BACKGROUND In Sweden, knowledge about the role of enteropathogenic Escherichia coli in neonatal calf diarrhea and the occurrence of antimicrobial resistance in E. coli from young calves is largely unknown. This has therapeutic concern and such knowledge is also required for prudent use of antimicrobials. METHODS In a case control study Esherichia coli isolated from faecal samples from dairy c...

Thirty-four calf and five infant fecal specimens were tested for the neonatal calf diarrhea virus (NCDV) and for the reovirus-like infantile diarrhea agent; respectively. The procedures used were the fluorescent virus precipitin test and immune electron microscopy. Fourteen of the calf stools contained detectable NCDV, and four of the five infant stools contained the reovirus-like human agent. ...