Invasion of HEp-2 and other eukaryotic cell lines by Providenciae: further evidence supporting the role of Providencia alcalifaciens in bacterial gastroenteritis.
Curr Microbiol
; 37(3): 159-65, 1998 Sep.
Article
en En
| MEDLINE
| ID: mdl-9688814
ABSTRACT
Wild-type strains of Providencia species were evaluated for their ability to invade HEp-2 monolayers based upon microscopic and semi-quantitative assays. Of 14 P. alcalifaciens strains tested, 3 (17%) were found to be highly invasive, 4 (22%) moderately invasive, and the remaining 61% weakly or noninvasive. HEp-2 invasion results were confirmed by thin-section electron microscopy. Invasive capabilities of P. alcalifaciens were greater at higher MOIs (100 to 1000) than at lower inocula (<10 MOI). No strain of P. stuartii or P. rettgeri tested invaded HEp-2 cells. Quantitative assays of Triton X-100-lysed, HEp-2-invaded cells indicated that between 0.001% and 0. 013% of the initial bacterial inoculum was gentamicin resistant. Further testing of select strains on various cell lines indicated the efficiency of invasion was Vero > Y1 > INT-407 > HEp-2. Two isolates recovered from a father and son with prolonged diarrhea after returning from Mexico were found to be identical on the basis of biotype, serotype, and genotype. These results provide additional evidence that some P. alcalifaciens strains cause gastroenteritis.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Providencia
/
Gastroenteritis
Límite:
Adolescent
/
Adult
/
Animals
/
Humans
/
Male
País/Región como asunto:
Mexico
Idioma:
En
Revista:
Curr Microbiol
Año:
1998
Tipo del documento:
Article
País de afiliación:
Estados Unidos