20
SUPPLEMENT TO THE ANNUAL REPORT OF THE
adult malaria carrying anophelines caught from different houses in the town on
this second visit, and also that only a few larvæ of the above species could be
obtained from the several breeding places such as wells, etc., which were breeding
profusely during the time of the first visit.
Malaria cases treated in Local Fund Hospital, Udayagiri, from April to December 1926.
M o n t h s .
No. of cases
treated for
malaria.
Months.
No. of cases
treated for
malaria.
April
1926
...
2,259
September 1926
...
490
May
"
...
1,451
October
"
...
548
June
"
...
659
November "
...
450
July
"
...
577
December
"
...
304
August
"
...
600
4. Adult mosquitoes.—The following table describes the catch and the result.
of dissection :—
TABLE VI.—Total mosquito catch. (For tables I to V s ee previous report).
All mosquitoes.
Males.
Females.
Culicines – total
...
...
...
...
. . .
26
67
Anophelines – total
...
...
... ... ...
27
105
Non-malaria carrying anophelines—all A.rossi
...
...
15
53
Malaria carrying anophelines—all A. culicifacies
...
12
52
No. of A. culicifacies found infected. (1 with zygote & 1 with
sporozoites)
...
...
...
...
...
...
. . .
2
Out of 225 mosquitoes caught, anophelines formed 58.7 per cent. Only
2 species of anophelines were obtained in all the catches made – A. rossi, a
non-carrier and A. culicifacies a carrier. Of the 52 females of A. culcifacies
dissected, 2 were found infected giving an infection rate of 3.8 per cent. This
confirms the observation made in the previous report that A. culcifacies is the
chief carrier of malaria in Udayagiri.
5. Anopheline breeding places.— These were the same as those found during
the time of the first visit except that, as a result of the failure of the monsoon,
the streams and irrigation channels were all practically dried up, but then were still
some small collections of water in a stream to the south-west of the town and
these contained larvæ of A. rossi and A. culicifacies. Numerous pools in the beds
of the main tanks contained larvæ of A. rossi and A. culicifacies. Disused wells of
which there are many throughout the town were found breeding larvæ of the
above two species. Locally there is a tradition that an ancient Hindu King had
365 wells dug and 365 temples built, each well and temple to be used by him
during each of the 365 days of an year, and that this accounts for the large
number of temples and wells. Larvæ were scarce in these wells but in some a
few larvæ could be obtained with difficulty. On account of the continued
presence of a man-eating tiger in the neighbouring hill, it was not possible to go
too far into the interior of the hill in search of breeding places, but the foot of
the hill facing the town was fully surveyed by me. Thus it will be seen that the
main breeding places at the present time are (1) wells and (2) pools in the beds of
tanks and these contained larvæ of A. culicifacies which is the carrier species of
the locality.
FIRST REPORT ON MALARIA IN DUTTALUR (APRIL 1926)
By LIEUT.-COL. H. H. KING, I.M.S.
AND
CIVIL ASSISTANT SURGEON M. K. RAMASWAMI AYYAR.
Initiation of survey.—See the report on Udayagiri.
Description.—Duttalur is a large village in the Udayagiri Taluk of the Nellore
District. It is about 10 miles east of Udayagiri and 20 miles south of Mopad and