الفهرس 
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Abstract
One hundred and thirty six out of one hundred and forty eight diarrheic dogs less than six month old proved to be infected by viral, bacterial, parasitic causes alone or with mixed infection. Higher prevalence of viral infection (CPV & CCV) (75.5%) was recorded than other type of infections. E.coli was detected in 30.9% of the cases and Varity of parasitic causes (41.9%) were also responsible for diarrhea, some of them were zoonotic. Mixed infections were recorded by variable percentages. Different risk factors were studied including age, sex, breed, season and mangemental conditions.Age, sex, vaccination history and prophylactic deworming had a significant effect on the prevalence of infectious diarrhea. A trial of treatment using specific drugs was done.