Validation of a volunteer model of cholera with frozen bacteria as the challenge

David Allen Sack, Carol O. Tacket, Mitchell B. Cohen, R. Bradley Sack, Genevieve A. Losonsky, Janet Shimko, James P. Nataro, Robert Edelman, Myron M. Levine, Ralph A. Giannella, Gilbert Schiff, Dennis Lang

Research output: Contribution to journalArticle

Abstract

To evaluate a standardized inoculum of Vibrio cholerae for volunteer challenge studies, 40 healthy adult volunteers were challenged at three different institutions with a standard inoculum prepared directly from vials of frozen, virulent, El Tor Inaba V. cholerae N16961, with no further incubation. Groups of 5 volunteers, with each group including 2 volunteers with blood group O, were given a dose of 105 CFU, and 34 of the 40 volunteers developed diarrhea (mean incubation time, 28 h). Transient fevers occurred in 15 (37.5%) of the volunteers. V. cholerae was excreted by 36 of 40 volunteers. Five additional volunteers received 104 CFU, and four developed diarrhea but with a lower average purging rate than required for the model. Of the 40 volunteers, 37 developed rises in their vibriocidal and antitoxin titers similar to those in previous groups challenged with freshly harvested bacteria. We conclude that challenge with frozen bacteria results in a reproducible illness similar to that induced by freshly harvested bacteria. Use of this model should minimize differences in attack rates or severity when groups are challenged at different times and in different institutions.

Original languageEnglish (US)
Pages (from-to)1968-1972
Number of pages5
JournalInfection and Immunity
Volume66
Issue number5
StatePublished - May 1998

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Cholera
Volunteers
Bacteria
Vibrio cholerae
Diarrhea
Antitoxins
Blood Group Antigens
Healthy Volunteers
Fever

ASJC Scopus subject areas

  • Immunology

Cite this

Sack, D. A., Tacket, C. O., Cohen, M. B., Sack, R. B., Losonsky, G. A., Shimko, J., ... Lang, D. (1998). Validation of a volunteer model of cholera with frozen bacteria as the challenge. Infection and Immunity, 66(5), 1968-1972.

Validation of a volunteer model of cholera with frozen bacteria as the challenge. / Sack, David Allen; Tacket, Carol O.; Cohen, Mitchell B.; Sack, R. Bradley; Losonsky, Genevieve A.; Shimko, Janet; Nataro, James P.; Edelman, Robert; Levine, Myron M.; Giannella, Ralph A.; Schiff, Gilbert; Lang, Dennis.

In: Infection and Immunity, Vol. 66, No. 5, 05.1998, p. 1968-1972.

Research output: Contribution to journalArticle

Sack, DA, Tacket, CO, Cohen, MB, Sack, RB, Losonsky, GA, Shimko, J, Nataro, JP, Edelman, R, Levine, MM, Giannella, RA, Schiff, G & Lang, D 1998, 'Validation of a volunteer model of cholera with frozen bacteria as the challenge', Infection and Immunity, vol. 66, no. 5, pp. 1968-1972.
Sack DA, Tacket CO, Cohen MB, Sack RB, Losonsky GA, Shimko J et al. Validation of a volunteer model of cholera with frozen bacteria as the challenge. Infection and Immunity. 1998 May;66(5):1968-1972.
Sack, David Allen ; Tacket, Carol O. ; Cohen, Mitchell B. ; Sack, R. Bradley ; Losonsky, Genevieve A. ; Shimko, Janet ; Nataro, James P. ; Edelman, Robert ; Levine, Myron M. ; Giannella, Ralph A. ; Schiff, Gilbert ; Lang, Dennis. / Validation of a volunteer model of cholera with frozen bacteria as the challenge. In: Infection and Immunity. 1998 ; Vol. 66, No. 5. pp. 1968-1972.
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