LOUSE BORNE DISEASES 297 



Haemogregari7ia (Hepatozoon) funambuli (Patton), cause of the 

 ANEINIIA OF THE PALM SQUIRREL, Funambulus pennafii in India 

 was found in the vermicule stage in the gut and coelome of the louse, 

 Haemotopiiius sp., but further development was not observed. 



Metazoa 

 Platyhelmia: Cestoda: Cyclophyllidea: Taeniidae 



DipyUdium caninum (Linnaeus), the DOUBLE-PORED DOG 

 TAPEWORM, may have as an intermediate host the biting louse of the 

 dog, Trichodectes latus Nitzsch (canis Dc Geer) according to Melnikow, 

 although it usually passes its intermediate stages in fleas. 



This completes the summary of the evidence which has so far been 

 presented against the lice. There are many species of sucking lice of 

 wild and domestic animals, and tliere are many obscure or little known 

 animal diseases. It is naturally to be expected that the literature of 

 animal disease transmission by lice will grow. 



I have attempted also to show that the majority of the louse-borne 

 diseases pass through the body of tlie louse and out through the feces 

 and that they gain access to the host in the following ways : the rubbing 

 or scratching into a skin abrasion of infective portions of the insect body, 

 or its dried or fresh feces ; the carrying of the contamination on fingers 

 which have scratched the louse or its feces, and transfer of the contamina- 

 tion on the fingers to the mouth or the eye ; the licking up of the lice or 

 their feces by animals which cleanse themselves with the tongue. Direct 

 transmission by bite apparently does not occur except possibly in typhus 

 fever. 



It remains therefore to reiterate that all types of skin diseases and 

 blood diseases in which the louse might be suspected should be reinvesti- 

 gated in case the usual types of inoculation mentioned above have not 

 been tried. 



BIBLIOGRAPHY 



Abe, Nakao, 1907. — Miinch. med. Wochenschr., vol. 54, p. 1924. 

 Anderson, J. F., and Goldberger, J., 1912. — U. S. Treas. Dept., Hyg. 



Lab., bull. 86, pp. 101-130. 

 Arkwright, J. A., Bacot, A., and Duncan, F. M., 1918. — Brit. Med. 



Journ., Sept. 21, pp. 307-309. 

 Arkwriglit, J. A., Bacot, A., and Duncan, F. M., 1919. — Journ. Hyg., 



vol. 18, No. 1, pp. 76-94, plates 2, 3. 

 Aubert, 1879. — Les poux et les ecoles. Unpoint d'hygiene scolaire Lyon. 



Rev. in Ann. de Dermatol.. 1880, 2 ser., vol. 1, p. 292. 



