A NOTE ON SOME HELMINTHIC DISEASES WITH 
SPECIAL REFERENCE TO THE HOUSEFLY AS 
A NATURAL CARRIER OF THE OVA. 
By T. 0. SHIRCORE, M.B., M.R.C.P. (Edin.), 
Medical Officer, East African Medical Service, 
Mombasa, British East Africa. 
The incidence of Helminthiasis at Mombasa is herein briefly dealt 
with chiefly in tabular form. The tables give the result of the first 
100 examinations conducted on natives of indigenous races complaining 
of intestinal troubles, admitted into or attending hospital. 
Evidences of Helminthiasis were present in 83 per cent., absent in 
17 per cent. Of the positive cases the percentages of the different 
ova of parasitic worms found were as follows: 
Anhylostoma duodenale .. .. 46 % 
Ascaris lumbricoides .. .. 44 
Trichocephalus dispar .. .. 43 
Taenia saginata .. .. .. 29 
Schistosomum mansoni .. .. 5 
Oxyuris vermicularis ' .. .. 2 
Strongyloides stercoralis .. .. 3 
Multiple infections are very frequent: 
Single 
Double 
Triple 
Quadruple 
34-92 % 
25-73 
20-48 
10-84 
The chief single infections are Ascaris lumbricoides and Tape Worm. 
The more common double infections are: 
Ascaris lumbricoides and T. dispar 
Anhylostoma duodenale and T. dispar. 
