Bovine mastitis caused by multidrug-resistant Nocardia farcinica
Acta sci. vet. (Impr.)
; 48(suppl.1): Pub.520-4 jan. 2020. ilus
Article
em En
| VETINDEX
| ID: biblio-1458347
Biblioteca responsável:
BR68.1
Localização: BR68.1
ABSTRACT
Background:
Mastitis caused by Nocardia is characterized by pyogranulomatous inflammation related to inadequatehygiene conditions and is difficult to treat. Prompted by the absence of documentation of Nocardia farcinica associated tobovine mastitis in the Northeast region of Brazil, this is the first report to describe bovine mastitis caused by multidrugresistant N. farcinica.Case Four milk samples (one from each teat) obtained from a 3-year-old Jersey cow raised on a property located in the metropolitan region of Recife, Pernambuco state, Brazil, were submitted to the Laboratory of Infectious-Contagious Diseases ofthe Veterinary Hospital at Universidade Federal Rural de Pernambuco [UFRPE]. At the laboratory, samples were cultured inbase agar enriched with 7% sheep blood (blood agar) in a microbiological incubator at 37°C under aerobic conditions for 72h. After only 48 h, however, pure bacterial colony growth was observed in all samples. Macroscopic analysis revealed smallcolonies, with an irregular shape, dry aspect, and greyish in color. Gram-positive rods forming filaments and/or ramificationswere observed using a Gram staining method. Nocardia spp. were identified according to morphotinctorial characteristics.Susceptibility testing using the disc-diffusion method in agar (antibiogram) was performed using the following antibioticspenicillin (10 IU), tetracycline (30 µg), amoxicillin (10 µg), gentamicin (10 µg), cephalexin (30 µg), erythromycin (15 µg),cephalothin (30 µg) and ampicillin (30 µg). However, the organism exhibited resistance to all drugs; as such, a new milksample was obtained at the same location the initial samples were collected. Samples (approximately 5 mL) were collectedaseptically and separately from all four teats in sterile bottles, during which the presence of granular material was noted.Bacterial culture was performed as...Palavras-chave
Texto completo:
1
Base de dados:
VETINDEX
Assunto principal:
Mastite Bovina
/
Nocardia
/
Nocardiose
Limite:
Animals
Idioma:
En
Revista:
Acta sci. vet. (Impr.)
Ano de publicação:
2020
Tipo de documento:
Article