ASCARIS LUMBMCOIDES. 415 



wandering and restlessness seated within the worm, are entirely 

 unknown to us. Causes whose seat is external to tins worm, are 

 those which act disquietingly upon the worm from the intestine 

 and in its interior, the first cause of which is sometimes to be 

 sought in changed and irritating nourishment, as is the case, 

 apparently epidemically, at the period of the great general change 

 of diet towards the spring, autumn, and winter, and sometimes 

 in morbidly altered anatomical or functional conditions of the 

 intestinal canal. If, then, the worm be disquieted by any causes, 

 it begins to wander about in the intestine which it inhabits, pro- 

 ducing all kinds of disorders, which may even lead to death. 

 According to the irritability of the individual, the number of the 

 wanderers, the place to which they have wandered, and lastly, 

 according to the power of the worms themselves of asserting their 

 vital activity, so varies the danger to which these wanderers give 

 rise. The irritations which cause the worms to pass out per anum, 

 are not only innocent, but even curative. This is the case 

 especially when the worm has been disquieted. Sudden, 

 verv waterv diarrhoeas carrv it awav mechanically, after swelling 

 it up, and destroying its adhesive power. We see this par- 

 ticularly in cholera. But if the worm passes to the gall-ducts, 

 in which it can continue its life, say at least for some days, it 

 may produce all kinds of hepatic disorders, as, for instance, 

 catarrh of the gall-ducts, nay, even abscess, and phenomena 

 which are otherwise the consequences of the incarceration of 

 gall-stones. As the oil of turpentiue in Durand's mixture is also 

 salutary against this worm, in such cases a treatment analogous 

 to that of gall-stones alone would be salutary. If the worm gets 

 into the ductus pancreaticus, or the vermiform appendage, inflam- 

 mation and obstruction of these parts, perityphlitides, &c, may 

 follow. If it passes into the air-passages it may become the 

 cause of violent spasm of the larynx at the moment of its 

 immigration, and, by a longer stay in the bronchia?, of violent 

 catarrh, of fits of coughing, nay, even of pneumonia, which either 

 lead to death, or to a rapid cure, by removing the intruder by 

 coughing and retching. If the worm remains fixed in the 

 stomach, or on the way from the stomach towards the mouth, or 

 the outer nasal aperture, it gives rise to disorders which are milder 

 or more violent, and of longer or shorter duration, according to 

 the condition in which it finds itself at the moment of its arrival. 

 If it reaches the above-mentioned regions by simply wandering 



