Abstract
There are several infectious diseases that affect equines and can cause large economic losses in this sector and damage to animal welfare. In this species, abscessing lesions of a purulent character preferentially in the withers are strongly suggestive of brucellosis. However, few studies have been carried out on the disease in this species, making its identification and control difficult due to the lack of standardization in the interpretation of results. Therefore, samples of whole blood, serum and purulent secretion were collected from three horses. The animals came from the state of Pará. The diagnostic methods selected were the Rose-Bengal plate test (RBPT) and Polymerase Chain Reaction (PCR), for the negative molecular results for brucellosis, microbiological analysis were chosen. Although part of the samples were positive for brucellosis in serological tests, all of them showed negative results for PCR. In bacterial cultivation, species were isolated Streptococcus equi subsp. zooepidemicus, Enterococcus faecalis e Staphylococcus sciuri subsp. lentus., which showed resistance to antibacterials, especially the E. faecalis isolate classified as MDR (multi drug resistant). In conclusion, the best form of diagnosis is the joint evaluation of several tests, both screening and confirmatory, in order to obtain a definitive diagnosis with assertiveness.
Highlights
Brazil concentrates one of the largest equine herds in the world, with approximately 4,236,062 heads according to the2017 census, of which an estimated 323,655 are in the state of Pará (IBGE, 2017; Silva et al, 2018)
The present study aimed to identify the etiological agents of withers abscesses in equines from the state of Pará and to assess their susceptibility to antimicrobial drugs
The animals were known to be positive in the Rose-Bengal plate test (RBPT) performed in the field, according to the MAPA recommendations (Brasil, 2006), for confirmatory effect, the samples reacting to RBPT were submitted to retesting the conventional RBPT, according to the procedure adopted by Ribeiro et al, (2003) and to the Polymerase-mediated Chain Reaction (PCR) (Paim, et al, 2015)
Summary
Brazil concentrates one of the largest equine herds in the world, with approximately 4,236,062 heads according to the. There are several infectious diseases that affect horses and can cause great economic losses in this sector and damage to the well-being of animals, including diseases of zoonotic potential such as glanders, leptospirosis and brucellosis (Barcelos et al, 2017; Rocha et al, 2019). Economic damages resulting from brucellosis are considered lower when compared to other species of zootechnical interest, such as cattle and pigs in which brucellosis is considered a reproductive disease (Silva et al, 2018). The importance of differential microbiological diagnosis in cases of abscesses in the withers and synovitis in equines is evidenced in order to avoid economic losses and risks to public health ( Silva et al, 2018). The present study aimed to identify the etiological agents of withers abscesses in equines from the state of Pará and to assess their susceptibility to antimicrobial drugs
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