Select provisions that are valid for the latent (chronic) phase of HIV infection:
b)
seropositivity (anti-HIV antibodies);
d)
a progressive decrease in the number of CD4 T lymphocytes;
Vibrio genus involves many species, only some serotypes of V.cholerae are pathogens of cholera. Which of the following causative agents of cholera?
V.cholerae serogroups non O1 and non O139
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