VIII, B, 3 Crowell and Hammack: Intestinal Parasites 



161 



Our findings with reference to the more frequently encoun- 

 tered intestinal parasites in the series of 500 autopsies are as 

 follows : 



Table IV. — Incidence of intestinal parasites in 500 autopsies. 



Parasites. 



Number 



of 



cases. 



Per 

 cent. 



A.scci'ns 



206 



83 



172 



5 



1 



25 



41.2 



16.6 



34.4 



1.0 



0.2 



5.0 



Hookworm -- 



Trichuvis trichiura 



Oxytivis -- .- 



Tsenia ... 



EtitCLTficebd . . 





As to other parasites we may mention the occurrence of ma- 

 laria in 5 per cent of the cases, liver flukes {Clonorchis sinensis) 

 in 2 cases, and at least 1 case of schistosomiasis. 



Our figures are lower than the averages compiled by Willets, 

 the incidence of Entamoeba being especially lower than the results 

 published by many authors. The incidence of the various para- 

 sites will now be taken up in greater detail, and reports will be 

 added of the cases which we desire to place upon record, 



ASCARIS 



Our figures (41.2 per cent) on the incidence of Ascaris are 

 lower than those of Willets (6) and higher than those of Gar- 

 rison, (i) The number of Ascaris found in any one case varied 

 from one to nearly two hundred, and while the worms have not 

 been individually identified they have all been classed as Ascaris 

 lumbricoides. It has been stated by Braun (8) and other authors 

 that the Ascaris leaves the human host in the course of febrile 

 diseases. In order to study this question in our series, the 

 febrile cases were studied with the following result: 



25 cases of malaria, with Ascaris 9 



15 cases of typhoid, with Ascaris 4 



46 cases of plague, with Ascaris 17 



25 cases of lobar pneumonia, with Ascaris 14 



14 cases of bacillary dysentery with Ascaris 9 



Per cent. 



36 



26.6 



36.9 



56.0 



66.6 



This table shows that in our series the febrile cases did not 

 have a lower percentage of infestation with Ascaris than the 

 nonfebrile cases. 



