(c) Segments break off and pass out in the feces.
(d) The tape worm’s eggs are then eaten by a snail, slug, beetle, or other insect which becomes the “intermediate host.” Here the tape worm undergoes a certain amount of development.
Figure 46. Life cycle of pigeon tape worm.
(e) If the intermediate host is eaten by a pigeon, the young tape worm attaches itself to the bird’s intestine and soon grows to maturity.
(2) Diagnosis. Tape worms harm the host by injuring the intestine at the point where they bury their heads, by absorbing food, and by giving off antenzymes.
(3) Treatment. Unsatisfactory.
(4) Prevention. (a) Pigeons must be well-cared-for and fed so that they will not care to eat the intermediate hosts.
(b) The method of prevention prescribed for ascarids is also applicable for tape worms.