lice: 21 



is set up. The rest of the fowls is disturbed, and a 

 general weak and cachectic condition will be sure to 

 prevail if the parasites are present in force and no 

 steps are taken for their destruction. 



Brood-hens are frequently much inconvenienced 

 by lice, many failures in hatching being due to their 

 constant irritation. 



It is, however, chiefly in chicks that the mischief 

 is caused. The lice, as it were, sap the life-blood 

 out of the young growing birds. The result is that 

 by this constant biting, causing violent pruritus 

 and inflammation in the affected parts, the growth 

 of the birds is checked, and stunted birds are the 

 consequence. 



Some experiments in this direction showed that 

 chicks suffering from lice, at the end of the year, 

 weighed one pound less than those which had been 

 kept free from these pests, both having exactly the 

 same diet. 



It must be remembered that the sharp biting and 

 violent irritation causes considerable pain to the 

 bird, when these parasites are present in abundance. 



We often find that lice are present in super- 

 abundance in fowls suffering from Diphtheritic Roup 

 and Gapes. As a rule the lice are the precursor of 

 these two maladies, especially the former. By their 

 deleterious effects the constitution of the host becomes 

 impaired, and thus, just as with human beings, 

 rendered more liable to contract any such infectious 

 complaint as Diphtheritic Roup is well known to be. 



The different species seem partial to particular 



