Retrospective study of diseases diagnosed in free range chickens (Gallus gallus domesticus) in the southern region of Rio Grande do Sul, over a period of 20 years (2000 - 2020)
DOI:
https://doi.org/10.33448/rsd-v10i10.18978Keywords:
Poultry diseases; Free-range chicken; Parasitosis; Salmonellosis.Abstract
The objective of this study was to identify and to describe the main diseases that affect free-range chickens, sent to the Laboratório Regional de Diagnóstico of the Faculty of Veterinary Medicine of the Universidade Federal de Pelotas (LRD/UFPel), between the years 2000 and 2020. The necropsy protocols of domestic chickens referred to the LRD/UFPel in the last 20 years were reviewed. During this period, 565 samples were received corresponding to cadavers and organs of domestic chickens, 229 of which from free-range poultry farms. Out of 229 cases, 203 (88,64%) had a conclusive diagnosis. The main diagnosed diseases were bacterial with 79/203 (38,92%) cases, followed by parasitic 59/203 (29,06%). Among bacterial diseases, salmonellosis was the most frequent with 26/79 cases, with 22/26 Gallinarum and 4/26 Pullorum biovars isolated. Parasitic diseases, mixed parasitosis were the most prevalent with 37/59 cases, mainly associated with the intestinal nematode Ascaridia galli. The main causes of death in free-range chickens in this study were mixed parasitosis, followed by avian salmonellosis (fowl typhoid and pullorum disease). The breeding system and inadequate sanitary management, both for chickens and for the environment, were the main factors related to the occurrence of infectious diseases diagnosed in the LRD/UFPel.
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Copyright (c) 2021 Rosimeri Zamboni; Taina dos Santos Alberti; Fabiano da Rosa Venancio; Ana Lucia Schild; Gilberto D'Ávila Vargas; Eliza Simone Viégas Sallis
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