Avaliação da transmissão e contaminação de codornas japonesas (Coturnix japonica) por Salmonella Pullorum. / Assessment of transmission and contamination of Japanese quail (Coturnix japonica) with Salmonella Pullorum.

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

08/12/2009

RESUMO

The quail raising is a consolidated activity in poultry commercial alternative. Due to this development, new research is emerging to better productivity in all activities of this sector. Thus the health of these birds becomes an important field of study in large-scale production of quail for both the production of egg and for the production of cut. One of the main diseases that affect the production of poultry is disease pullorum, this is caused by the pathogen Salmonella Pullorum (SP). These bacteria cause significant production losses in the poultry industry, as well as contaminate the products from the production of quail. Thus, this study aims to investigate the relationship between the time of elimination of Salmonella sp. fecal samples and infection of eggs and organs in Japanese quail infected orally as well as assess the level of infection of birds. To achieve this goal were 60 adult Japanese quails divided into three groups randomly, each group with 20 birds. In group A was orally inoculated Salmonella Pullorum strain with a dose of 1.5 x 102 colony forming units (CFU) and group B with a dose of 7.5 x 109 CFU and group C was the control group in which the birds were inoculated with a saline solution. on days 3, 6, 9, 16 and 23 postinoculation (DPI) were collected one swab in one cloacae, eggs as well as caecum, intestines, ovary, oviduct and liver, for the procedure microbiological. Were counted on the colony forming units (CFU) of all samples. There was a high level of shedding and infection in all groups. The birds of group B in 03 and 06 dpi shedding a greater amount of SP than group A. The transmission to the eggs was high in 03, 06 and 09 dpi decreasing progressively in the days after. Regarding infection of organs between groups was no statistical difference, although numerically the group B showed greater isolation in 03 and 09 dpi. By the end of the experiment (16 and 30 dpi) the birds continued shedding SP. The count of CFU varied between 2.53 and 2.3 on all days of collection and in all organs, however the liver showed a higher level of contamination, reaching in 3dpi 2,53 CFU/mL. Macroscopically, we observed several pathological changes such as steatosis and hemorrhagic spots in the liver, follicular atresia and the presence of gas in the cecum, however from 09 dpi there was an absolute decrease of alterations. Thus it is concluded that SP affects the internal organs of the quail, but also indicate a high shedding and infection of bacteria and their spread to their eggs.

ASSUNTO(S)

salmonella pullorum codornas japonesas infecção experimental reproducao animal salmonella pullorum japanese quail experimental infection

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