Long term survival of 'damaged' Nippostrongylus brasiliensis adult worms in the testosterone-treated Indian soft-furred rat, Millardia meltada

animal de laboratoire animales de laboratorio experimental infection fecundity fertilidad fertilite fertility immunity in vivo experimentation inmunidad intestin intestines intestinos laboratory animals local immunity membrana mucosa mucous membrane muqueuse nippostrongylus brasiliensis pest resistance rat rata rats resistencia a las plagas testosteronas testosterone