"ملف 2/7 II مُراسلات بخصوص الاحتياطات والأمور الأخرى المتخذة لمكافحة الملاريا" [و‎‎٨‎١] (٢٩٦/١٦١)

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being consiatently favourable tliroughout the yeiir, variations
$
in the length of period during which mean temperature remain
ed constantly between 75°F. and 90°?. determine the severity
of the malaria season.
With regard to the distribution of malaria, the spleen
rates in Manama town, Sukaiya and Muharrak town would indic
ate that the causation of malaria was intiraately related to
the presence or otherwise of gardens in the i-?nediate
neighbourhood. But it is equally evident that gardens are
not the sole factor, and that a high degree of malaria may
prevail in their absence, for example in liifa-a-Ash-Sharqi
and the Market and the Jama Masjid areas in Manama Town.
The nature of the influences at work in these latter areas
V
will probably provide an important clue to the malaria problf
of the island.
The case of Galali is in certain respects peculiar, as
the history of malaria in this village does not altogether
furnish the reasons for the existing moderate endemicity.
| A solution of these problems will be forthcoming only
after a detailed anopheline survey, for which the foilowing
programme is proposed:-
(a) The determination of the vector species.
(b) The bionomics of tne vector species.
(c) The relative intensity of breeding in:-
and
,i) the gardens,
,11) the artesian wells and drains,
,ili) wells, pits and excavations,
,iv) vrater storage jars.
(d) The feasibility of the employment of cheap
sluicing methods and of larvivorous finh such as
gambusla afflnls in the control of breeding.
The following staff is suggested for these inveetiga.
tions:-
(1) Medical officer - To initiate the investigations,
probable period of stay - one week.
(2) One Sub-Assistant Surgeon^,
(3) One Lab. Assistant ) To carry out investigation!
(4) One Insect Collector ) over a perioa of six weeks