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1.
Rev. cuba. med. trop ; 57(2)mayo-ago. 2005. ilus, tab
Article in Spanish | LILACS | ID: lil-439514

ABSTRACT

Se desarrolló una metodología para la selección de cepas de Vibrio cholerae O1 y O139 modificadas genéticamente, con el objetivo de obtener candidatos vacunales atenuados orales contra el cólera. A las cepas modificadas se les realizó caracterización microbiológica, susceptibilidad bacteriana y diferentes pruebas biológicas (dosis letal media, capacidad colonizadora, adherencia en ratones, intestino ligado e inoculación intraduodenal en conejos como pruebas de virulencia y potencia). Las cepas 81, 638, 638T y 1333 fueron evaluadas en ensayos clínicos para determinar su reactogenicidad e inmunogenicidad. Todas las cepas fueron sensibles a la tetraciclina y doxiclicina y mostraron su atenuación e inmunogenicidad en modelos animales, resultando las cepas 638 y 1333 inmunogénicas y no reactogénicas en voluntarios


Subject(s)
Clinical Trials as Topic , Models, Animal , Vaccines , Vibrio cholerae
2.
Rev. cuba. med. trop ; 52(2): 106-109, May-Aug. 2000.
Article in Spanish | LILACS | ID: lil-333488

ABSTRACT

The antimicrobial susceptibility and the presence of a heat-stable toxin were researched into 100 non-01 Vibrio cholerae strains sent by 7 different health centers to the National Reference Laboratory of Acute Diarrheal Diseases in "Pedro KourÝ" Tropical Medicine Institute. The presence of 20 toxigenic non-01 Vibrio cholerae was detected, a figure substantially higher than that reported in other geographic areas, except for endemic areas. This result will make it possible to set epidemiological alert in Cuba because these strains can be infected by CTX phages (element transporting genes that encode for choleric toxin) which will give such strains an epidemic potential similar to that of the etiologic agent of cholera. The identified strains could be studied as possible cholera vaccine candidates.


Subject(s)
Humans , Animals , Infant , Child, Preschool , Mice , Cholera Toxin/isolation & purification , Vibrio cholerae , Bacterial Typing Techniques , Cuba , Feces , Microbial Sensitivity Tests , Polymerase Chain Reaction , Serotyping , Cholera Toxin/analysis , Vibrio cholerae
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