Estudo da dinâmica de eliminação de ooquistos de Eimeria spp. em frangos de corte criados em sistemas intensivos

Abstract

Avian coccidiosis is a disease caused by protozoa of the genus Eimeria spp. It is considered one of the most important diseases in poultry farming due to the direct impact it has on the zootechnical performance of the birds and the large economic losses. The lesions caused by Eimeria result in a reduction in the capacity to absorb nutrients, affecting the productive gain of the chickens, and also represent a gateway to other enteropathogens. The aim of this study was to determine the dynamics of elimination of Eimeria ssp. oocysts in broilers during the production cycle of broilers reared in intensive systems. A longitudinal study was carried out from February to April 2022. The study population consisted of broilers reared in seven (07) poultry units. 150 fecal samples were collected from broilers in the production units (PU) included in the study. The samples were processed using the Willis technique to assess the presence of Eimeria ssp. oocysts, and Eimeria spp. oocysts were observed in 45 samples (30%), corresponding to three units (UP4, UP6 and UP7). The intensity of infection was determined by counting oocysts per gram of feces (OOPG), using the MacMaster technique. The OOPG ranged from 0-96,800 and the elimination of oocysts during the production cycle was characterized by a continuous rise from the eighteenth day and reached the peak of excretion on the twenty-sixth day. After carrying out the present study, it can be concluded that gastrointestinal parasitism by the genus Eimeria ssp. occurs, and the dynamics of the elimination of Eimeria ssp. oocysts in broilers reared in intensive systems was characterized by a progressive increase from the 18th day and peaked on the 26th day and despite the use of anticoccidial drugs in the feed, it was possible to observe levels of infections by coccidia of the genus Eimeria ssp. in the present study.(TRADUÇÃO NOSSA)