Parâmetros biofísicos e morfométricos dos ossos, músculos e cartilagens de frangos de corte saudáveis e com discondroplasia tibial
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2016-02-02
Autores
Santos, Regina de Fátima Mazaro [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este trabalho teve como objetivo analisar morfometricamente o tecido ósseo, muscular e cartilaginoso presentes nas articulações tibiotársicas e tarsometatársicas dos membros pélvicos direito e esquerdo, bem como a avaliação macroscópica e histológicados músculos e cartilagens, além de se investigar a densidade mineral óssea e a resistência óssea, de frangos de corte normais e com discondroplasia tibial. Foram utilizados 22 frangos de corte Cobb, com 42 dias de idade, distribuídos em dois tratamentos, que consistiram em dez aves normais e doze com discondroplasia tibial. Os dados foram analisados pelo software SAS. Os resultados evidenciaram que a perda do peso corporal e do membro pélvico de aves discondroplásicas evidenciam comprometimento sistêmico dos frangos e o desuso dos membros, o que acarreta em prejuízos econômicos ao descartar as aves afetadas. As diferenças estruturais observadas pelo aumento de peso em determinados músculos em detrimento de outros mostram que existe uso excessivo de alguns músculos em aves acometidas pela discondroplasia tibial resultando em alterações na marcha dos animais. Os parâmetros de crescimento e qualidade óssea do tibiotarso e metatarso de frangos de corte são influenciados negativamente pela discondroplasia tibial, no entanto, essa enfermidade não afeta a densidade mineral óssea e a resistência óssea dessas aves.O comportamento cartilagíneo observado no presente experimento caracteriza mecanismo compensatório com maior número de condrócitos em aves acometidas pela discondroplasia tibial, evidenciando uma resposta compensatória em relação às alterações morfofisiológicas dos ossos e músculos.
This study aimed to analyze morphometric bone, muscle and cartilage tissues present in the tibiotarsus and tarsometatarsal articulation of right and left hind limbs, to perform macroscopical and histological examination of muscles and cartilage, and to investigate bone mineral density and bone strengthin normal broiler chicks presenting tibial dyschondroplasia. A total of 22 Cobb broiler chicks with 42 years of age were enrolled into two experimental groups, which consisted of 10 normal birds and 12 chicks presenting tibial dyschondroplasia. Data obtained were analyzed by SAS software. The results showed that the body weight and hindlim blosses in chicks with tibial dyschondroplasia had evident systemic involvement and disuse members, which results in economic losses due to discard of affected chicks. Structural differences observed and caused by weight gain in certain muscles showed that there was an overuse of certain muscles in birds with tibial dyschondroplasia resulting in gait disturbance in those birds. The growth, tibiotarsus and metatarsa bones quality parameters in broiler chicks are negatively influenced by tibial dyschondroplasia, however, this disease does not affect bone mineral density and bone strength of these birds. The cartilage behavior observed in this experiment characterized a compensatory mechanism involving a largest number of chondrocytes in birds affected by tibial dyschondroplasia, indicating a compensatory response in relation to morphological and physiological changes in the bones and muscles.
This study aimed to analyze morphometric bone, muscle and cartilage tissues present in the tibiotarsus and tarsometatarsal articulation of right and left hind limbs, to perform macroscopical and histological examination of muscles and cartilage, and to investigate bone mineral density and bone strengthin normal broiler chicks presenting tibial dyschondroplasia. A total of 22 Cobb broiler chicks with 42 years of age were enrolled into two experimental groups, which consisted of 10 normal birds and 12 chicks presenting tibial dyschondroplasia. Data obtained were analyzed by SAS software. The results showed that the body weight and hindlim blosses in chicks with tibial dyschondroplasia had evident systemic involvement and disuse members, which results in economic losses due to discard of affected chicks. Structural differences observed and caused by weight gain in certain muscles showed that there was an overuse of certain muscles in birds with tibial dyschondroplasia resulting in gait disturbance in those birds. The growth, tibiotarsus and metatarsa bones quality parameters in broiler chicks are negatively influenced by tibial dyschondroplasia, however, this disease does not affect bone mineral density and bone strength of these birds. The cartilage behavior observed in this experiment characterized a compensatory mechanism involving a largest number of chondrocytes in birds affected by tibial dyschondroplasia, indicating a compensatory response in relation to morphological and physiological changes in the bones and muscles.
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Palavras-chave
Aves, Cartilagens, Histologia, Metatarso, Musculo e tibiotarso, Birds, Cartilage, Histology, Metatarsal, Muscle and tibiotarsus