<prompt> The following virus can be grown only in suckling mice-Coxsackie virusRhinovirusEchovirusPoliovirus  <response>: Ans. is a i.e., Coxsackie virus . It is necessary to employ suckling mice for the isolation of coxsackie viruses. . Inoculation is usually made by intracerebral, subcutaneous and intraperitoneal route. . Adult mice are not susceptible. 