Occurrence and antibiotic resistance of coliform bacteria and antimicrobial residues in pasteurized cow's milk from Brazil.
J Food Prot
; 73(9): 1684-7, 2010 Sep.
Article
en En
| MEDLINE
| ID: mdl-20828476
ABSTRACT
In this study we examined the hygienic and sanitary quality of pasteurized cow's milk in the state of Paraná, Brazil, by determining the presence of coliforms and occurrence of antimicrobial residues. A total of 260 milk samples were collected from commercial establishments in different regions of the state. Coliform populations were estimated by the multiple-tube test, and antimicrobial residues were detected by enzyme-linked immunosorbent assay. Overall, 105 samples (40.4%) were unsuitable for consumption according to Brazilian legal standards. Among the coliforms, Escherichia coli and Klebsiella pneumoniae were respectively identified in 77.05 and 36.07% of the samples. The highest rates of resistance to antimicrobial agents were observed for ampicillin (19.2%), cephalothin (18.9%), and tetracycline (17.1%). Antimicrobial residues were detected in 80 samples (30.8%). Forty-eight samples (18.5%) were positive for tetracycline, 29 (17.4%) for neomycin, 9 (3.5%) for beta-lactams, 6 (2.3%) for gentamicin, 4 (1.5%) for chloramphenicol, and 1 (0.4%) for streptomycin-dihydrostreptomycin. The results demonstrate a high prevalence of coliforms and also a high occurrence of antimicrobial residues in pasteurized cow's milk from Paraná, Brazil.
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Bases de datos:
MEDLINE
Asunto principal:
Residuos de Medicamentos
/
Contaminación de Alimentos
/
Farmacorresistencia Bacteriana
/
Leche
/
Enterobacteriaceae
Tipo de estudio:
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Animals
/
Humans
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
J Food Prot
Año:
2010
Tipo del documento:
Article
País de afiliación:
Brasil