Anatomopatologia e bacteriologia da pododermatite em frangos de corte sob inspeção sanitária

• Autor(a) principal: Teixeira, Vinicius de Queiroz
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal Fluminense (RIUFF)
• Texto Completo: https://app.uff.br/riuff/handle/1/18531
• topic: Dermatite; Coxim plantar; Macroscopia; Lesões histológicas; Microbiologia; Corte de frango; Dermatitis; Foot-pad; Gross; Histological lesions; Microbiology; Chicken cut; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA

Pododermatitis is a type of contact dermatitis that affects the food-pads of broilers and may also affect the digital pads. The development is characterized by discoloration of the skin, hyperkeratosis, erosions and ulcers in more severe cases. These injuries cause locomotion problems in birds in order to restrict their access to food and water which slows their development and hurts the welfare of animals. Chicken feet and paws are an important cut for Brazilian exportation market especially for Asian countries. From this, more attention should be given to the quality of this product as a food. In this study pathological evaluation of 93 feet of broilers, with 50 days of life, obtained in a poultry slaughterhouse under Sanitary Inspection, chosen randomly among the three types of classification: 30 feet Type A - without injury, apparently intact; 30, Type B - mild injuries, the presence of swelling and shedding of the stratum corneum, and 33, type C - or multiple severe injuries, severe shedding of the stratum corneum and areas of necrosis, that are rejected. For histological analysis a score of three points was developed: 1 - presence of perivascular lymphoid nodules and absence of cellular debris; 2 - presence of ulcer or cell s debris, inflammatory infiltrate and/or lymphoid nodules and 3 - presence of ulcer or cell s debris, inflammatory infiltration and lack of perivascular lymphoid nodules. There was an association (chi-square, p<0.05) between the macroscopic classification (A, B and C) used in processing technology and the histological degenerations (scores 1, 2 and 3). There was a significant difference (ANOVA, p<0,05) between the average scores of histopathology observed in macroscopic classifications A, B and C. Grading A diverged (Tukey-Kramer p<0.05) ratings of B and C as the scores histopathology observed, but there was no difference between B and C. It was also evaluated bacterial contamination inside the injured foot-pads of 23 feet classified as C. In the initial cultivation in plates, bacterial growth was discreet in six plates with counts less than 10 CFU. After enrichment of the samples, bacterial growth in 17 of them, being isolated gram-negative bacteria in eight, supposedly identified as enterobacterium and gram-positive in 11 samples, identified as Staphylococcus spp., Streptococcus spp. and Enterococcus spp