Abstract

The infective larvae of Molineus barbatus penetrated the skin of a young mouse stretched on a cork ring when applied in saline solution at blood temperature. This was confirmed by percutaneous exposure of ferrets. Infections were also initiated by mouth. The development of larvae was slow after skin penetration and rapid after oral exposure. The larvae are positively geotropic, thermotropic, phototactic, thigmotropic and unable to withstand even brief desiccation. Longevity in water of stage 3 larvae was studied at temperatures ranging from 5 °C to 40 °C. The higher temperatures were lethal to larvae, which exsheathed before death in many cases.

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