Development Of A Live, Oral, Attenuated Vaccine Against El Tor Cholera

Vibrio cholerae EI Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RSI. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous geneti...

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Published inThe Journal of infectious diseases Vol. 170; no. 6; pp. 1518 - 1523
Main Authors Taylor, David N., Killeen, Kevin P., Hack, Dallas C., Kenner, Julie R., Coster, Trinka S., Beattie, David T., Ezzell, John, Hyman, Tracy, Trofa, Andrew, Sjogren, Maria H., Friedlander, Arthur, Mekalanos, John J., Sadoff, Jerald C.
Format Journal Article
LanguageEnglish
Published Chicago, IL The University of Chicago Press 01.12.1994
University of Chicago Press
Subjects
Online AccessGet full text
ISSN0022-1899
1537-6613
DOI10.1093/infdis/170.6.1518

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Abstract Vibrio cholerae EI Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RSI. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous genetic elements and generating Peru-3, Bang-3, and Bah-3. Fifteen volunteers received one dose of various vaccine strains at 4 ‘d7 106 to 1 ’d7 108 cfu. All strains colonized the gut. A ⩽5? 4-fold rise in vibriocidal titer was observed in 14 volunteers, with titers of ⩽5? 1600 in 13. Peru-3 was the least reactogenic, but 2 of 6 volunteers had loose stools. Peru-14, a filamentous motility-deficient mutant of Peru-J, was well tolerated and colonized 18 of 21 volunteers at doses of 2 ‘d7 106 to 1 ’d7 109 cfu. Also, when 8 Peru-3 or Peru-S vaccinees, 5 Peru-14 vaccinees, and 8 controls were challenged with 2 'd7 106 cfu V. cholerae EI Tor Inaba (NI6961), 11 vaccinees were protected compared with no controls. Peru-14 shows promise as a safe, effective, single-dose oral vaccine against EI Tor cholera.
AbstractList Vibrio cholerae El Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RS1. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous genetic elements and generating Peru-3, Bang-3, and Bah-3. Fifteen volunteers received one dose of various vaccine strains at 4 x 10(6) to 1 x 10(8) cfu. All strains colonized the gut. A > or = 4-fold rise in vibriocidal titer was observed in 14 volunteers, with titers of > or = 1600 in 13. Peru-3 was the least reactogenic, but 2 of 6 volunteers had loose stools. Peru-14, a filamentous motility-deficient mutant of Peru-3, was well tolerated and colonized 18 of 21 volunteers at doses of 2 x 10(6) to 1 x 10(9) cfu. Also, when 8 Peru-3 or Peru-5 vaccinees, 5 Peru-14 vaccinees, and 8 controls were challenged with 2 x 10(6) cfu V. cholerae El Tor Inaba (N16961), 11 vaccinees were protected compared with no controls. Peru-14 shows promise as a safe, effective, single-dose oral vaccine against El Tor cholera.Vibrio cholerae El Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RS1. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous genetic elements and generating Peru-3, Bang-3, and Bah-3. Fifteen volunteers received one dose of various vaccine strains at 4 x 10(6) to 1 x 10(8) cfu. All strains colonized the gut. A > or = 4-fold rise in vibriocidal titer was observed in 14 volunteers, with titers of > or = 1600 in 13. Peru-3 was the least reactogenic, but 2 of 6 volunteers had loose stools. Peru-14, a filamentous motility-deficient mutant of Peru-3, was well tolerated and colonized 18 of 21 volunteers at doses of 2 x 10(6) to 1 x 10(9) cfu. Also, when 8 Peru-3 or Peru-5 vaccinees, 5 Peru-14 vaccinees, and 8 controls were challenged with 2 x 10(6) cfu V. cholerae El Tor Inaba (N16961), 11 vaccinees were protected compared with no controls. Peru-14 shows promise as a safe, effective, single-dose oral vaccine against El Tor cholera.
Vibrio cholerae El Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RS1. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous genetic elements and generating Peru-3, Bang-3, and Bah-3. Fifteen volunteers received one dose of various vaccine strains at 4 x 10(6) to 1 x 10(8) cfu. All strains colonized the gut. A > or = 4-fold rise in vibriocidal titer was observed in 14 volunteers, with titers of > or = 1600 in 13. Peru-3 was the least reactogenic, but 2 of 6 volunteers had loose stools. Peru-14, a filamentous motility-deficient mutant of Peru-3, was well tolerated and colonized 18 of 21 volunteers at doses of 2 x 10(6) to 1 x 10(9) cfu. Also, when 8 Peru-3 or Peru-5 vaccinees, 5 Peru-14 vaccinees, and 8 controls were challenged with 2 x 10(6) cfu V. cholerae El Tor Inaba (N16961), 11 vaccinees were protected compared with no controls. Peru-14 shows promise as a safe, effective, single-dose oral vaccine against El Tor cholera.
Vibrio cholerae EI Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RSI. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous genetic elements and generating Peru-3, Bang-3, and Bah-3. Fifteen volunteers received one dose of various vaccine strains at 4 ‘d7 106 to 1 ’d7 108 cfu. All strains colonized the gut. A ⩽5? 4-fold rise in vibriocidal titer was observed in 14 volunteers, with titers of ⩽5? 1600 in 13. Peru-3 was the least reactogenic, but 2 of 6 volunteers had loose stools. Peru-14, a filamentous motility-deficient mutant of Peru-J, was well tolerated and colonized 18 of 21 volunteers at doses of 2 ‘d7 106 to 1 ’d7 109 cfu. Also, when 8 Peru-3 or Peru-S vaccinees, 5 Peru-14 vaccinees, and 8 controls were challenged with 2 'd7 106 cfu V. cholerae EI Tor Inaba (NI6961), 11 vaccinees were protected compared with no controls. Peru-14 shows promise as a safe, effective, single-dose oral vaccine against EI Tor cholera.
Vibrio cholerae El Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RSI. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous genetic elements and generating Peru-3, Bang-3, and Bah-3. Fifteen volunteers received one dose of various vaccine strains at 4 X 10⁶ to 1 X 10⁸ cfu. All strains colonized the gut. A ⩾4-fold rise in vibriocidal titer was observed in 14 volunteers, with titers of ⩾1600 in 13. Peru-3 was the least reactogenic, but 2 of 6 volunteers had loose stools. Peru-14, a filamentous motility-deficient mutant of Peru-3, was well tolerated and colonized 18 of 21 volunteers at doses of 2 X 10⁶ to 1 X 10⁹ cfu. Also, when 8 Peru-3 or Peru-5 vaccinees, 5 Peru-14 vaccinees, and 8 controls were challenged with 2 X 10⁶ cfu V. cholerae El Tor Inaba (N16961), 11 vaccinees were protected compared with no controls. Peru-14 shows promise as a safe, effective, single-dose oral vaccine against El Tor cholera.
Vibrio cholerae El Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RS1. The B subunit of ctx (ctxB) was reintroduced into the recA gene of the deletion mutants, rendering them unable to recombine with exogenous genetic elements and generating Peru-3, Bang-3, and Bah-3. Fifteen volunteers received one dose of various vaccine strains at 4 x 10 super(6) to 1 x 10 super(8) cfu. All strains colonized the gut. A greater than or equal to 4-fold rise in vibriocidal titer was observed in 14 volunteers, with titers of greater than or equal to 1600 in 13. Peru-3 was the least reactogenic, but 2 of 6 volunteers had loose stools. Peru-14, a filamentous motility-deficient mutant of Peru-3, was well tolerated and colonized 18 of 21 volunteers at doses of 2 x 10 super(6) to 1 x 10 super(9) cfu. Also, when 8 Peru-3 or Peru-5 vaccinees, 5 Peru-14 vaccinees, and 8 controls were challenged with 2 x 10 super(6) cfu V. cholerae El Tor Inaba (N16961), 11 vaccinees were protected compared with no controls. Peru-14 shows promise as a safe, effective, single-dose oral vaccine against El Tor cholera.
Author Sadoff, Jerald C.
Ezzell, John
Taylor, David N.
Coster, Trinka S.
Kenner, Julie R.
Mekalanos, John J.
Beattie, David T.
Killeen, Kevin P.
Hack, Dallas C.
Friedlander, Arthur
Hyman, Tracy
Trofa, Andrew
Sjogren, Maria H.
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ISSN 0022-1899
IngestDate Sun Sep 28 02:55:48 EDT 2025
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IsPeerReviewed true
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Issue 6
Keywords Human
Immune response
Vaccine strain
Toxicity
Oral administration
Vaccine
Infection
Prevention
Immunoprophylaxis
Production
Bacteriosis
Bacteria
Vibrionaceae
Cholera
Attenuated strain
Vibrio cholerae elTor
Language English
License CC BY 4.0
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Reprints or correspondence (present address): Dr. David N. Taylor, Naval Medical Research Institute Detachment, Unit 3800, APO AA 34031; from outside United States: NAMRID, Centro Medico Naval, Avenida Venezuela Cdra 36/s/n, Callao, Peru.
Present affiliation: Department of Gastroenterology, Waiter Reed Army Medical Center, Washington, DC.
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PublicationDateYYYYMMDD 1994-12-01
PublicationDate_xml – month: 12
  year: 1994
  text: 1994-12-01
  day: 01
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PublicationTitle The Journal of infectious diseases
PublicationTitleAlternate J Infect Dis
PublicationYear 1994
Publisher The University of Chicago Press
University of Chicago Press
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Snippet Vibrio cholerae EI Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RSI. The...
Vibrio cholerae El Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RSI. The...
Vibrio cholerae El Tor strains from Peru, Bangladesh, and Bahrain were attenuated by deletion of a genetic element that encodes virulence factors and RS1. The...
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SubjectTerms Adolescent
Adult
Animals
Animals, Suckling
Antibodies, Bacterial - blood
Bacterial diseases
Biological and medical sciences
Cholera
Cholera - prevention & control
Cholera vaccine
Cholera Vaccines - adverse effects
Cholera Vaccines - genetics
Cholera Vaccines - immunology
Diarrhea
Dosage
Feces - microbiology
Female
Genes, Bacterial - genetics
Human bacterial diseases
Humans
Immunoglobulin G - blood
Infectious diseases
Intestines - microbiology
Major Articles
Male
Medical sciences
Mice
Microbial colonization
Recombination, Genetic
Sequence Deletion
Toxins
Transcriptional regulatory elements
Tropical bacterial diseases
Vaccination
Vaccines, Attenuated - adverse effects
Vaccines, Attenuated - genetics
Vaccines, Attenuated - immunology
Vibrio cholerae
Vibrio cholerae - genetics
Vibrio cholerae - growth & development
Vibrio cholerae - immunology
Vibrio cholerae - pathogenicity
Virulence
Volunteerism
Title Development Of A Live, Oral, Attenuated Vaccine Against El Tor Cholera
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https://www.jstor.org/stable/30133665
https://www.ncbi.nlm.nih.gov/pubmed/7995992
https://www.proquest.com/docview/16812277
https://www.proquest.com/docview/76885999
Volume 170
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