Mycoplasma gallisepticum como fator de risco no peso de lotes de frangos de corte com condenação por aerossaculite na Inspeção Sanitária Federal

Abstract

Pesq. Vet. Bras. 32(7):645-648, julho 2012 645 RESUMO.-A Indústria avícola brasileira cresce anualmente e se torna cada vez mais representativa na produção e exportação dos seus produtos. Os cuidados com a sanida- The Brazilian poultry industry improves annually and is more representative on production and exportation of their products. Care on poultry health cooperates to these developments, however, respiratory agents that affect weight and carcass quality, continue to threaten poultry production. Airsacculitis is considered the main cause of total and/ or partial condemnation of broilers carcasses, being Mycoplasma gallisepticum (MG) the most important agent of it. This study aimed to detect MG by "Polymerase Chain Reaction" (PCR) and to correlate its positivity with airsacculitis, weight losses and condemnated broilers by Federal Sanitary Inspection. A total of 40 ϐlocks of slaughter broilers under Federal Inspection in Rio Grande do Sul, Brazil, were randomly selected. In each ϐlock three broilers, regardless of sex, were randomly chosen for necropsy where tracheas were collected and polled in one sample for analysis. For PCR, DNA was extracted by the method of phenol-chloroform and ampliϐied with pairs of speciϐic primers for MG. From the 40 ϐlocks PCR analyzed, 20% (8/40) were positive for MG. MG detection was found to be correlected with airsacculitis increase and weight decrease by multiple logistic regression equation (p<0,05), LogitPi= 7.9409 + (0,5601 x X1) -(3.3080 x X2). Airsacculitis rate increase also correleted with decrease in body weight by simple linear regression equation (p<0.05), Y= 2.1050 -0.6397X. In conclusion, MG positivity is related to airsacculitis which causes weight loss in broilers. In addition, the PCR was an effective technique for the detection of MG in ϐlocks of broilers, but was not affected by the kind of biological specimens collected, as tracheal scraping or swab. Mycoplasma gallisepticum

Caracterização anatomopatológica e bacteriológica em frangos de corte condenados totalmente por colibacilose sob Serviço de Inspeção Federal

“…Nesse trabalho havia relação entre a positividade de MG com aumento na condenação por aerossaculite e com o baixo peso dos lotes (Machado et al 2012). Já em abatedouros sob SIF no estado de Goiás identificou-se pela PCR do saco aéreo de frangos de corte condenados por aerossaculite MG em 32,2% (10/31) dos lotes, MS em 25,8% (8/31) e isolou-se E. coli em 80,6% (25/31).…”

“…As lesões no trato respiratório aumentam as condenações de carcaças em abatedouros (Minharro et al 2001, Sentíes--Cué et al 2005, Machado et al 2012) e tornam as aves mais susceptíveis a infecções secundárias, principalmente por E. coli (Alencar et al 1998, Kleven & Ferguson-Noel 2008, Ley 2008.…”

Origin of broiler carcass condemnations

“…The decrease of immunological resistance causes opportunistic bacterial infections (Ferreira and Knobl, 2009). Thus, airsacullitis is one of the leading causes of total and partial broiler carcass condemnation (Machado et al, 2012). The affected broilers present lower weight, contributing to flock unevenness and causing problems during slaughter, especially in the evisceration session, increasing frequency of fecal and biliary carcass contamination.…”

Artrite Infecciosa Em Frangos De Corte

“…De acordo com MACHADO et al (2012) com o crescimento anual da avicultura e o aumento das exportações, cuidados com a sanidade do plantel avícola são cada vez mais necessários, pois agentes com o MG afetam negativamente o ganho de peso e a qualidade das carcaças no abate, o que leva a inúmeros prejuízos para o setor avícola. REVOLLEDO & FERREIRA (2009), BACK (2010) e RECK et al (2012) descreveram, que as aves acometidas por Mycoplasma synoviae apresentam doença infecciosa caracterizada por infiltração das membranas sinoviais, tendinite exsudativa, bursite esternal e artrite.…”