Present Situation on Incidence of Paratyphoid Infection in Kafrelsheikh Chicken Farms, Egypt

. HIS work aimed to investigate the epidemiology and methods of diagnosis and treatment of Salmonella paratyphoid infection in chickens during the period from March to December 2020. For this purpose, a total of 200 suspected diseased chicks 2-14 days old were collected from 10 chicken farms located in Kafrelsheikh Governorate, Egypt. These chicks were examined, and then samples were taken from the lung, liver, intestine, and gall bladder to investigate the current situation of the incidence of Salmonella paratyphoid. These samples were examined bacteriologically, biochemically and serologically and histopathological examination with treatment of experimentally infected chicks. The results revealed 36 isolates with an incidence of (18%). The prevalence of Salmonella paratyphoid in the internal organs was highest in the intestine (55.6%), followed by liver (25%), gall bladder (13.9%), and lowest in lung (5.6%). Serotyping of Salmonella isolates revealed that two different serotypes (S. Kentucky and S. rechovot) with incidence of 28(77.8%) and 8(22.2%) respectively. The antibiogramme of isolated salmonella strains revealed sensitivity to thiamphenicol, amoxycillin and sulphatrimithoprine, respectively, but, resistant to flomoquine, neomycin and clindamycin. Conclusion: Salmonella paratyphoid is a serious infectious disease to all poultry farms due to high morbidity and mortality. Prevention and control can be achieved by adopting the principles of HACCP (Hazard Analysis Critical Control Point). Hygiene and biosecurity should be part of the overall management of the farm.