Original scientific paper

Effect of an experimental Eimeria tenella invasion upon an artificial Salmonella Typhimurium infection in broiler-chickens

Ventzislav Koinarski ; Department of Veterinary Microbiology, Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
Mihni Lyutskanov ; Department of Veterinary Microbiology, Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
Valentina Urumova ; Department of Veterinary Microbiology, Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria

Abstract

The effect of an experimental Eimeria tenella invasion upon an artificial Salmonella Typhimurium infection was studied in 200 broiler-chickens. The birds were divided into 5 experimental groups. The first group was challenged with S. Typhimurium for three consecutive days. By the 4th day, the chickens were infected once with sporulated E. tenella oocysts. The second group was infected once with E. tenella and 24 h later - infected with S. Typhimurium during three consecutive days. The third group of birds was submitted to a single E. tenella infection. The birds from group IV were infected with Salmonella for three days whereas chickens from group V were not infected (negative controls). The highest values of parameters, determining the severity of the epidemy (morbidity rate, lethality, cumulative mortality) were observed in the group where the Eimeria invasion preceded the Salmonella infection.The most frequent and most prolonged isolation of Salmonella from parenchymal organs was also observed with birds with mixed infection, with Eimeria infection coming first before salmonellosis. The same group was characterized with the highest values of oocyst and lesion indexes as well as with the worst economic results - lowest live body weight and lowest daily weight gain.

Keywords

Salmonella; Eimeria tenella; broiler-chickens; oocysts

Hrčak ID:

31911

URI

https://hrcak.srce.hr/31911

Publication date:

19.8.2005.

Article data in other languages: croatian

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