ANIMAL PARASITES OF MAN. 203 



shown in an earlier paper, 13 the relative number of adult specimens of 

 T. saginata and T. solium, deposited in the Helminthologieal Collection 

 of the Bureau of Science, indicated a considerably greater prevalence of 

 the former species. 



Figures for the frequency of infection with the beef and the pork 

 tapeworms in different localities have ranged from 0.06 to 3.66 per cent 

 for the former and from 0.02 to 3 per cent for the latter species. Several 

 authors have reported no infections found in large series of cases 

 examined. 14 



INFECTIONS WITH PARAGONIMUS. 

 (0.4 per cent.) 



The infections with lung flukes here reported were diagnosed by 

 finding the ova in the fasces. In most of the cases they were also found 

 in the sputum and it can not be excluded that they were present in the 

 sputum in all cases and reached the intestines as a result of the swallow- 

 ing of the eggs. 13 



Geographic distribution. — The history of the 18 patients infected with 

 Paragonimus with regard to place of residence before commitment to the 

 prison was as follows: One from Manila, one from Cavite, one from 

 Camarines Norte, one from Albay, two from Sorsogon, four from Sarnar, 

 six from Leyte, and two from Mindanao. 



The central and northern provinces of Luzon were fully as well 

 represented among the prisoners examined as were the southern prov- 

 inces and the southern islands of the Archipelago, yet no patient infected 

 with Paragonimus gave a history of residence north of Manila and, with 

 the exception of the cases from Manila and Cavite, in neither of which 

 could the possibility of previous residence in the southern provinces be 

 eliminated, all instances of paragonimiasis gave a history of origin in 

 the islands south of Luzon or in the peninsula forming the southern 

 extremity of that island. 



ls This Journal, Sec. B., (1907), 2, 537. 



11 Bull. Hyg. Lab., U. 8. Pub. Health & Mar.-B.osy. Serv., Wash. (1906) 28, 

 66-67. 



13 It would appear from our experience, that the value of examination of the 

 faeces in the diagnosis of paragonimiasis has not been sufficiently emphasized, the 

 examination of the sputum alone being usually stated as the method for 

 diagnosis. In several cases, repeated examination of the sputum was necessary 

 before ova could be found, although they were present almost constantly in the 

 stools. When found in the sputum they were usually more abundant than in 

 the faeces. If, as appears, the discharge of ova of the lung fluke in the sputum 

 is, in some cases at least, intermittent, it is not illogical to suppose that the ova 

 swallowed with the sputum become more or less scattered along the alimentary 

 tract and are discharged more gradually, in less concentration, but with relatively 

 greater constancy in the faces. We would suggest, therefore, the value of 

 microscopic examination of the faeces as well as of the sputum in the diagnosis 

 of lung-fluke infection. 



