Actividades desenvolvidas numa unidade de criação de frangos no bairro de Albazine (Cidade de Maputo), caso de estudo: ocorrência da Klebsiella pneumoniae associada à mortalidade em frangos de corte

Abstract

This work aimed to report the activities developed during the curricular internship, as well as to present a case study related to the area of ​​animal production. The internship took place from October to December of 2023, in a private company producing and raising broiler chickens and laying hens, located in the Albazine neighborhood, in the city of Maputo. The internship consisted of monitoring the routine activities in the aforementioned poultry house. There were 2993 birds housed, divided into two batches, batch A with 1500 birds and batch B with 1493 day-old chicks. In this process, routine activities inherent to the chicken production process were developed. The routine activities developed were: cleaning and disinfection of the sheds, application of bedding, activation of footbaths, reception of chicks, heating, feeding, treatment and prophylaxis, as well as the evaluation of the productive performance of the batches. The mortality rate observed was 5.73% for batch A and 4.01% for batch B. At 28 days, the average weight of the birds in batch A was 1199.3 g, while in batch B it was 1126 g. For the description of the case study, samples were collected from three dead birds from batch A that showed signs of diarrhea, prostration, anorexia, motor incoordination, and secretions in the eyeball. The birds were subjected to necropsy. At necropsy, splenomegaly, hepatomegaly, lungs with a hyperemic appearance, and intestines with pasty, whitish, and mucous content were observed. In the histopathological examinations, a discreet multifocal lymphocytic infiltrate was found in the heart between the cardiac muscle fibers. In the lung, thickening of the alveolar septa was observed, along with the presence of multifocal inflammatory infiltrate composed of lymphocytes, heterophils, and macrophages, as well as foci of granuloma formation. Microbiological examination revealed the presence of Klebsiella pneumoniae bacteria in the intestinal and lung samples, characterized by the formation of colonies with a pinkish and shiny color, elevated appearance, and mucoid consistency. Based on the necropsy findings, histopathological and microbiological examinations, the diagnosis of pneumonia associated with Klebsiella pneumoniae infection was established.(TRADUÇAO NOSSA)