33 ; - 
Necator americanus, Strongyloides stercoralis, Ascaris lumbri- 
coides, Trichuris trichiura. 
Cestodes : Taenia saginata, Taenia solium, Hymenolepis nana, 
Taenia echinococcus. 
Treinatodes: Schistosomum haematobium. 
Protozoa : Balantidium coli, Amoeba histolytica, Amoeba coli, 
Amoeba sp. various, Trichomonas vaginalis and other flagel¬ 
lâtes. 
Among the natives of this région and the West Indies no ins¬ 
tance of infection by a cestode has been authenticated at autopsy. 
Cestode infections are confined to the Europeans and Americans. 
From a comparative point of view this is strange because the na¬ 
tive dogs, cats, rats, birds, etc., h.arbor many varieties of this 
class of worms. Few opportunities for examinations‘of native Pa- 
namans, living in the Provinces, hâve occurred, but in no ins¬ 
tance has cestode ova been detected. 
A few instances of Bilharsiosis hâve been seen among natives 
of the West Indies, excepting these and, a few cases of Bilhar- 
ziosis among patients from varions parts of the world, no infec¬ 
tions by trematodes are found among natives or residents of this 
région, though infection by this class of worm is not uncommon 
among native animais, the raccoon and iguana, for example. 
The patients whose stools were examined hâve been in the in- 
sane division of Ancon Hospital for varying periods up to four 
years. There are 199 males and 117 females. The females are ail 
adults from the West Indies, Jamaica, Martinique, Barbados and 
some of the smaller islands and some are native Panam,ans. The 
males are adults from the sanie localities, but in addition there 
are 24 Europeans, chiefly Spanish, two Americans of European 
birth, one American negro, three Chinese and one Japanese. 
Percentage of infection in native and West Inclian males and 
females, exclusive of Europeans and others : 
No. of patients examined, 285 
Négative examinations of stools 
£ of ail stools.examined. 
Hookworm infections. 
. 37.9 
d° 
Whipworm infections. 
. 46,7 
d° 
Roundworm infections . 
. 4 .o 
d° 
Strongyloides infections . 
d° 
Oxyuris infections . 
d° 
23 
