[Antibiotic of resistence profile of Salmonella spp. serotypes isolated from retail beef in Mexico City].
OBJECTIVE
To determine the serotype and antibiotic resistance profile of Salmonella spp. isolated from retail ground beef in Mexico City.


METHODS
A total of 100 samples of ground beef were analyzed. The pathogen was isolated by conventional methods and confirmed by PCR (invA gene, 284 bp).The antibiotic resistance profile was determined by the Kirby-Bauer method while serotyping was performed according to the Kauffman-White scheme.


RESULTS
We isolated a total of 19 strains of Lomita (6), Derby (4), Senftenberg (2), Javiana and Cannsttat (1) and undetermined (5) serotypes. The strains showed a high resistance rate to ampicillin (18/19), carbenicillin (16/19), tetracyclin (13/19), and trimethoprim-sulfamethoxazole (13/19). Multidrug resistance was observed in 14 isolates.


CONCLUSIONS
Several Salmonella spp. serotypes of public health significance are circulating in ground beef sold in the major Mexican city. Some of these strains are multi-drug resistance.
Nova
N
Nayarit-Ballesteros
María Salud
MS
Rubio-Lozano
Enrique
E
Delgado-Suárez
Danilo
D
Méndez-Medina
Diego
D
Braña-Varela
Oscar
O
Rodas-Suárez
D000818:Animals; D002417:Cattle; D004352:Drug Resistance, Microbial; D005516:Food Microbiology; D006801:Humans; D008461:Meat Products / Q000382:microbiology; D008800:Mexico; D000069466:Red Meat / Q000382:microbiology*; D012475:Salmonella / Q000145:classification / Q000187:drug effects* / Q000302:isolation & purification; D012478:Salmonella Food Poisoning; D012703:Serotyping; D014504:Urban Health