Avaliação de perda econômica por linfadenite caseosa em caprinos abatidos no semiárido brasileiro.

Abstract

Caseous Lymphadenitis (CL) caused by Corynebacterium pseudotuberculosis causes economic loss due to condemnation of carcass in slaughterhouses, compromising goat breeding. There is a high prevalence in the national herd, resulting in losses due to treatment expenses, production drop, condemnation of milk, carcass, organs, viscera and devaluation of the skin. This work aimed to characterize and size the financial loss associated with CL by condemnation in the slaughter line. The research was carried out in the Municipal Abattoir of the city of Patos, Paraíba, Brazil, where there is slaughter of caprines from this region. In the year 2017, 3.662 animals were slaughtered, an average of 305/month. During the study period, from March to August of the same year, 304 goats with no defined racial pattern were evaluated, both sexes and ages. The ante-mortem examination was submitted to inspection and palpation of superficial lymph nodes; post mortem, organs and viscera. The collected caseous material was submitted to microbiological analysis for diagnosis. The average price of the kilogram (Kg) of goat meat and "buchada de bode" (obtained by means of research in refrigerators and supermarkets in the city of Patos) was used to calculate the loss in the Real [R$ 17,39 (CI: 16,45 - 18,33)]. C. pseudotuberculosis was isolated in 84,42% of the samples (65/77), representing 21,38% (65/304) of the evaluated individuals. Females accounted for 13,16% of the prevalence, while males, 8,22%. Of those affected, 11,51% presented the clinical form, while 9,87% presented the subclinical form; of these, 1,31% had both clinical form and internal impairment. Pre-crural lymph nodes affected 25,71%, mammary nodes 11,43% and pre-scapular 11,43% were more affected; internally, liver 63,33%, lung 13,33% and medium mediastinal lymph node 10%. The presence of lesion/cutaneous scar (Odds ratio = 2,394, CI 95% = 1,371 - 4,182; p = 0,003) and female sex (Odds ratio = 1,845, CI 95% = 1,053 - 3,232; p = 0,044). Considering the average carcass weight (11,485 Kg), organs (1,085 Kg) and viscera (2,013 Kg), there was an average production of 4.447,815 Kg/month, resulting in R$ 77.347,50. The convictions subtracted monthly 270,872 Kg, equivalent to R$ 4.710,46. Of the annual production (53.373,780 Kg), there was a reduction of 3.250,464 Kg per discard, causing a decrease of R$ 56.525,57. A negative impact of 6,09% on revenue is attributed to the condition. CL is present in semi-arid caprines sent to slaughter, causing considerable financial detriment, reinforcing the need to implement control measures for this disease aiming at a greater financial return to the activity, as well as greater attention to inspections in the abattoirs by health inspectors.