Abstract
Summary
Mechanical damage and implantation of pumice stones into the gallbladder of patas monkeys seemed to extend the period of excretion of vibrios, principally in animals not vaccinated parenterally with the homologous strain. The administration of live El Tor vibrios, without surgery, also appeared to induce pathological changes in the gallbladders of some unvaccinated animals. The vibriocidal activity titers remained elevated for a longer time in animals that excreted vibrios for an extended period.
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