Selectivity in IgG Subclass Response to Live Plague Vaccine in Humans

Feodorova, Valentina A.; Khizhnyakova, Maria A.; Lyapina, Anna; Telepnev, Maxim V.; Ulianova, Onega V.; Lyapina, E.P.; Motin, Vladimir L.

doi:10.1016/j.provac.2014.07.006

Cited by 1 publication

(1 citation statement)

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“…It was used for vaccinating the laboratory staff and the population of plague enzootic areas [5]. This vaccine is licensed for use against plague and is still being used in former French colonies, Mongolia, and China [7]. It was introduced in the Soviet Union in the mid-1930s and is being used in Post-Soviet countries to this day [8–10].…”

Section: Introductionmentioning

confidence: 99%

Human response to live plague vaccine EV, Almaty region, Kazakhstan, 2014-2015

Sagiyev

Berdibekov²,

Bolger³

et al. 2019

PLoS ONE

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Background In Kazakhstan, a live plague vaccine EV 76 NIIEG has been used for plague prophylaxis since the mid-1930s. Vaccination is administered yearly among people living in plague-enzootic areas. Similar practices are used in other former Soviet Union countries. Yet, to this day, the effectiveness period of the vaccine is unknown. It is also not clear how different factors can affect the effectiveness of the vaccine over time. Methods We surveyed changes in antibody levels specific for F1 antigens of Yersinia pestis among vaccinated people 4, 8, and 12 months post- vaccination. Blood samples were taken from the participants of the study for producing sera, which was later analyzed using indirect hemagglutination reaction with antigenic erythrocyte assay (micromethod) for identifying antibodies to F1 Y . pestis . Results In first-time-receivers of the plague vaccine, antibody titer reached the highest level of antibody that represents a conditionally protective titer after 4 months, dropped drastically after 8 months, and dropped again after 12 months. Similar results were obtained among those who have been vaccinated previously. However, in that group, the percentage of people with a level of antibody that represents a conditionally protective titer remained statistically significant even after 8 and 12 months. Conclusion Based on the results of this study, we recommend initiating vaccination campaigns for the medical and veterinary staff, as well as the general population four months prior to the springtime epizootics of plague among wild rodents.

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