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NOTE ON ANKYLOSTOMIASIS IN NATAL. 
By ERNEST HILL, M.R.C.S. Engl., L.R.C.P. London, 
H.P.H. Cambridge. 
Health Officer for the Colony off Natal. 
At the present time Ankylostoma infection in man and disability 
resulting therefrom has aroused much concern. The geographical 
origin and present distribution of the two species of Ankylostoma known 
to be parasitic to man are of considerable interest, even though it be 
only academic. It is, therefore, probable that the following note may 
be worthy of publication. 
At the end of 1909 I received by courtesy of Dr Staunton, a Medical 
Officer in the service of the Indian Immigration Trust Board of Natal, 
824 Ankylostoma worms, obtained from the faeces of 18 Indians after 
treatment. I found 132 of the species Ankylostoma duodenale, 51 males 
and 81 females, and 692 of the species Uncinaria amerioana or Neccitor 
americauus, 220 males and 472 females. In seven cases the latter only 
was found to the total 218. 
The Indians had been resident in Natal, one for more than 10 years, 
one for six years, two for three years, and three for one year. In 11 
cases both species were found, tire duration of residence in Natal being 
seven years (one), four years (five), three years (three), two years (one), 
one year (one). The largest number of Necator found in any one case 
was 169 (with one Ankylostoma duodenale) and the smallest five (with 
54 A. duodenale). The largest number of A. duodenale was 54, the 
host having been resident about one year, and the smallest number one. 
I have not had opportunity of examining worms from Indians at time 
of arrival from India but from unpublished official reports of Mr B. A. 
Nicol, Medical Superintendent to the Indian Immigration Trust Board 
of Natal, it appears that Indians recruited in Madras Presidency are 
infested principally with Necator americanus. 
