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Previous issue date: 2017-07-31 / The study consisted in two experiments at beef cattle feedlot in Goias state. The first analyzed
the influence of macroscopic and histopathological changes in hot weight carcass (PCQ) of
cattle. At the slaughter line, lungs were macroscopically evaluated and samples were collected
for histopathological examination. Statistical analysis was performed by means of the analysis
of variance and Tukey's test, with a significance level of 5%, comparing the PCQ values of
the groups with lesions (CL) and without lesions (SL). Total of 2129 lungs were inspected,
and 12.78% were identified with macroscopic alterations. The mainly pneumonias identified
were fibrinous bronchopneumonia (4.78%), suppurative bronchopneumonia (4.04%),
granulomatous pneumonia (3.68%) and interstitial pneumonia (1.47%). The PCQ values did
not present significant differences (p> 0,05) between the CL and SL groups and were not
influenced by macroscopic and histopathological changes. In the second article, the influence
of dry (PS) and rainy (PC) periods on the macroscopic and histopathological pulmonary
alterations and the average daily gain (GPD) of cattle were analyzed. At the slaughter line, the
lungs were evaluated in the PS and PC periods. A macroscopic evaluation of the lungs was
performed, and samples were collected for histopathological examination. Statistical analysis
was performed using Tukey's test, with a significance level of 5%, to evaluate the effect of
pulmonary lesions on the GPD. In order to evaluate the association of lesion frequency with
the stations, a regression was performed considering a multinomial linear generalized model.
Of the animals evaluated, 15.92% and 23.15% had macroscopic lung alterations in PS and
PC, respectively. Among the pneumonias identified, the fibrinous bronchopneumonia (8,21%)
predominated in the PS and suppurative bronchopneumonia (14,28%) in the PC. The PC had
a higher frequency of macroscopic and histological lung lesions than PS. The lesions were
predominantly mild to moderate and of low frequency and, therefore, did not significantly
influence the GPD of confined cattle. / O estudo foi dividido em dois experimentos com bovinos confinados no estado de Goiás. O
primeiro analisou a influência das alterações pulmonares macroscópicas e histopatológicas no
peso de carcaça quente (PCQ) de bovinos. Na linha de abate, foram avaliados os pulmões de
bovinos machos provenientes de dois confinamentos e avaliou-se macroscopicamente
pulmões e coletou-se amostras para exame histopatológico. A análise estatística realizou a
comparação das médias de PCQ dos grupos com lesão (CL) e sem lesão (SL) pela análise de
variância e teste de Tukey, com grau de significância de 5%. Foram inspecionados 2129
pulmões e identificaram 12,78% com alterações macroscópicas. As principais pneumonias
identificadas foram: broncopneumonia fibrinosa (4,78%), broncopneumonia supurativa
(4,04%), pneumonia granulomatosa (3,68%) e pneumonia intersticial (1,47%). Os PCQ dos
animais não apresentaram diferenças significativas (p>0,05) entre os grupos CL e SL, não
sendo influenciadas pelas alterações pulmonares macroscópicas e histopatológicas. No
segundo artigo foi analisada a influência dos períodos seco (PS) e chuvoso (PC) nas
alterações pulmonares macroscópicas e histopatológicas e no ganho de peso diário (GPD) de
bovinos confinados. Na linha de abate, foram avaliados os pulmões de bovinos machos, nos
períodos PS e PC. Foram realizadas a avaliação macroscópica dos pulmões e coletada
amostras para exame histopatológico. A análise estatística realizou análise de variância e teste
de Tukey, com grau de significância de 5%, para avaliar o efeito das lesões pulmonares no
GPD e, para avaliar da associação da frequência de lesões com as estações, realizou regressão
considerando modelo linear generalizado multinomial. Dos animais avaliados, 15,92% e
23,15% apresentaram alterações pulmonares macroscópicas no PS e PC, respectivamente.
Dentre as pneumonias identificadas, a broncopneumonia fibrinosa (8,21%) predominou no PS
e a broncopneumonia supurativa (14,28%) no PC. O PC apresentou maior frequência de
lesões macroscópicas e histológicas pulmonares, quando comparado ao PS. As lesões foram,
predominantemente, de intensidade leve a moderada e de baixa frequência e, portanto, não
influenciaram significativamente no GPD de bovinos confinados.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.bc.ufg.br:tede/7999 |
| Date | 31 July 2017 |
| Creators | Cerqueira, Aline Barichello |
| Contributors | Cunha, Paulo Henrique Jorge da, Sant’ana, Fabiano José Ferreira de, Borges, Naida Cristina, Cunha, Paulo Henrique Jorge da, Miguel, Marina Pacheco, Borges, José Renato Junqueira |
| Publisher | Universidade Federal de Goiás, Programa de Pós-graduação em Ciência Animal (EVZ), UFG, Brasil, Escola de Veterinária e Zootecnia - EVZ (RG) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFG, instname:Universidade Federal de Goiás, instacron:UFG |
| Rights | http://creativecommons.org/licenses/by-nc-nd/4.0/, info:eu-repo/semantics/openAccess |
| Relation | 4581960685150189167, 600, 600, 600, -6217552114249094582, 6702961356132007056 |
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