② write the modes of infection for cholera and Typhoid : Ans
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Typhoid and cholera are endemic, and cause epidemics, in many developing countries. Typhoid and paratyphoid (enteric fevers) are caused by Salmonella enterica serovar Typhi and serovars Paratyphi A, B and C. Cholera is caused by Vibrio cholerae serotype O1 and serotype O139 synonym Bengal.
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