The heavy chains of immunoglobulins can belong to the following classes:
a) gamma ;
b ) mu ;
d ) alpha ;
e ) epsilon;
f)
delta .
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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