562 The Philippine Journal of Science 1922 
Letulle and Nattan-Larrier,(22) in their discussion of the 
hepatic lesions in human schistosomiasis, say: 
Schistosoma japonicum provokes marked perihepatitis and cirrhosis of 
the liver which is filled with ova, and the disorders caused by it are con- 
fined to the mesenteric vessels, the peritoneum, and the liver, while Egyp- 
tian bilharziasis attacks with preference the urinary tract and colon, and 
the lesions in the liver are very few. [Translation.] 
The distribution of the ova in the different organs of this 
series of cases and the lesions in these organs coincide with 
the findings of these authors for Schistosoma japonicum. 
The repeated finding by previous workers of ova of Schis- 
tosoma japonicum in stools, the absence of reported cases of 
either S. hzmatobium or S. mansoni from these Islands, as well 
as the finding of the adult worms and ova and the size of 
the ova found in our histological sections indicate that we are 
dealing with S. japonicum. 
DISCUSSION AND PREVENTION 
The high incidence in Manila shown in Table 1, is probably 
due to the lack of history from four of the cases in this report 
and because Manila, being the capital, contains more transients. 
The large number coming from Samar, the reports of previous 
workers, the yearly incidence at autopsy tables and laborato- 
ries, as well as the histories presented in this paper showing 
that almost all of the cases have never been out of the Islands, 
seem to indicate that the infection with Schistosoma japonicum 
is a menace to this country and is probably endemic. 
TABLE 1—Cases of schistosomiasis reported from the Philippine Islands. 
Author. Manila. | Samar. | Leyte. ——— ia Year. 
WRN oo ois i nc cd ea nec ue ensue (ues eouCot top somenc od Paaweoe ecco lseweneawoe 1906 
Garriqne ciciteeee cas 1 6 5 Og iene Beals 1906 
Phaleni.and Withélesssc) iu... es.) eo ee ict ia ante aetna ae Pee SE Be 1907 
WOES nso pec ee, 7 thaws ence A hg EEE ee 1 | 1908 
P. Guests. 2 ee Pe Se ee. ee 1918 
This report... 20 cet 7 2 Dg a og 1912-22 
Totelé 22 ee 10 9 7 4 3 31 
Dr. Albert W. C. T. Herre, of the Bureau of Science, tells 
me that Blanfordia nosophora Robson has not yet been recorded 
in the Philippine Islands, although this species or members of 
the same genus may be found here. So far, the only successful 
intermediary host for Schistosoma japonicum is this snail; yet, 
Cort(5) has demonstrated that other fork-tailed cercarie from 
the United States have shown several examples of lack of 
