Serogroups, K1 antigen, and antimicrobial resistance patterns of Aeromonas spp. strains isolated from different sources in Mexico
Mem. Inst. Oswaldo Cruz
;
101(2): 157-161, Mar. 2006. ilus
Artículo
en Inglés
| LILACS
| ID: lil-430892
RESUMO
A total of 221 strains of Aeromonas species isolated in Mexico from clinical (161), environmental (40), and food (20) samples were identified using the automated system bioMérieux-Vitek®. Antisera for serogroups O1 to 044 were tested using the Shimada and Sakazaki scheme. The K1 antigen was examined using as antiserum the O7K1C of Escherichia coli. Besides, we studied the antimicrobial patterns according to Vitek AutoMicrobic system. Among the 161 clinical strains 60 percent were identified as A. hydrophila, 20.4 percent as A. caviae, and 19.25 percent as A. veronii biovar sobria. Only A. hydrophila and A. veronii biovar sobria were found in food (55 and 90 percent respectively) and environmental sources (45 and 10 percent respectively). Using "O" antisera, only 42.5 percent (94/221) of the strains were serologically identified, 55 percent (121/221) were non-typable, and 2.5 percent (6/221) were rough strains. Twenty-two different serogroups were found, O14, O16, O19, O22, and O34 represented 60 percent of the serotyped strains. More than 50 percent of Aeromonas strain examined (112/221) expressed K1 encapsulating antigen; this characteristic was predominant among Aeromonas strains of clinical origin. Resistance to ampicillin/sulbactam and cephazolin was detected in 100 and 67 percent of Aeromonas strain tested for their susceptibility to antibiotics. In conclusion, antibiotic-resistant Aeromonas species that possess the K1 encapsulating antigen and represent serogroups associated with clinical syndrome in man are not uncommon among Aeromonas strains isolated from clinical, food and environmental sources in Mexico.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Polisacáridos Bacterianos
/
Microbiología del Agua
/
Aeromonas
/
Microbiología de Alimentos
/
Antígenos Bacterianos
Tipo de estudio:
Estudio pronóstico
Límite:
Humanos
País/Región como asunto:
México
Idioma:
Inglés
Revista:
Mem. Inst. Oswaldo Cruz
Asunto de la revista:
Medicina Tropical
/
Parasitología
Año:
2006
Tipo del documento:
Artículo
País de afiliación:
México
Institución/País de afiliación:
Instituto Politécnico Nacional/MX
/
Laboratorios Estatales de Salud Pública de Hidalgo/MX
/
Universidad Nacional Autónoma de México/MX
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