62 ENTOZOA FOUND TN MAN. 



be compatible with an apparently good state of health, 

 but in a large proportion of cases some symptoms, of 

 either a local or a sympathetic character, are evident. 



The local symptoms consist chiefly in disturbance 

 of the digestive functions, m abdominal pains, and 

 in itching at the anus. 



Most of the organs of the body may participate 

 in the sympathetic disturbance produced by the 

 existence of intestinal entozoa. 



The imaginary perception of disagreeable odours, 

 the dilatation of the pupil, the permanent or tem- 

 porary impairment of vision, the morbidly exag- 

 gerated sense of hearing, the perversion of the taste, 

 the itching and tinglmg of the skin, — any or all of 

 which may occur, — show the sympathetic action upon 

 the senses ; and, on the other hand, the drowsiness 

 or giddiness, the disturbed dreams, the convulsive 

 spasms, the wandering pains, the cough, the difficulty 

 of breathing, the palpitation of the heart, the inter- 

 mittent character of the pulse, the insatiable hunger 

 or thirst, the saHvation, and the emaciation, equally 

 afford evidence of the effects which are produced 

 upon the nervous system, the organs of respiration, 

 of circulation, and of digestion, and upon the secre- 

 tions and nutrition. 



In countries where entozoa are comparatively 

 rare, many of these phenomena may not be observed, 

 or may arise only in a modified degree ; but, in those 

 districts in which worms attack nearly the whole of 

 the population, the most varied complications are 

 attributable to the presence of these parasites in the 

 intestines, and are constantly treated and cured by 

 the administration of anthelmintics. 



