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identification of the high-virulence clone of group b streptococci in mexican isolates by growth characteristics at 40 degrees c.group b streptococci (gbs) colonizing the vagina and rectum of pregnant women cause invasive disease of the offspring in a small number of cases. the immune status of the host and differences in virulence among strains appear to be the main determinants for neonatal infection. a high-virulence clone (hvc) was proposed to cause much of the morbidity and mortality when a collection of gbs isolates was examined by multilocus enzyme electrophoresis. hvc isolates could be further distinguished by the ...19999871112
[frequency of isolation of ureaplasma urealyticum in an open population from southern mexico city].vaginal cultures for ureaplasma urealyticum and confidential questionnaires were obtained from women with signs and symptoms of vaginitis who consulted a physician at a primary health center, tlalpan, d.f., méxico. in all 220 women were studied, 50 (22.7%) of whom were colonized with ureaplasma urealyticum, statistical analysis (x2) showed there was no association between colonization with ureaplasma urealyticum, and age, pregnancy, and other but there was association between colonization with u ...19958552879
serotypes of 286 group b streptococci isolated from asymptomatic carriers and invasive disease cases in mexico.group b streptococcus (gbs) remains as a leading cause of neonatal sepsis and meningitis in developed countries, where type iii is the most common serotype. although gbs is considered an uncommon cause of perinatal pathology in mexico, a vaginal colonization rate of 14% in pregnant women and a neonatal infection rate of 1/1500 live births have been reported. the aim of this study was to determine the serotype distribution in a collection of 286 gbs strains isolated in mexico from asymptomatic ca ...200517061543
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