4 —

It will be seen that the greatest number of collections of Stegomyia found during any month was 24 in December and the least, 1 in October. The total population of Port Sudan is 30,000.

No collections of stegomyia larvae were found in Khartoum or Omdurman.

Month

Number of

infections

of larvae

Number of

infections

of pupae

Species A. S. C. TOTAL

Januarv 15 10 - 6 19 25 February 7 3 - 7 3 10 March . . 6 4 - 4 6 10 April . . 12 i 1 7 5 13 May 11 .—- 11 11 June . . 12 2 1 10 3 14 July. 6 — - 6 6 August 2 — - 2 - 2 September 3 1 3 1 4 October 1 1 1 1 2 November 24 6 - 16 14 30 December 27 5 - 24 8 32

Totals 126 33 2 97 60 159

A=Anopheles. S= Stegomyia. C=Culex.

DIPHTHERIA.

Diphtheria was again epidemic in Khartoum Province and in Wadi- Haifa Merkaz. Sporadic cases also occurred at Port Sudan, Malakal. Sennar,

Wad-Medani, El-Obeid and in Berber Province.

139 cases occurred this year in Khartoum, Khartoum North and Omdurman, with 25 deaths. 58 cases with 17 deaths occurred in the rest of the Sudan.

The disease is active from October to April, when it dies down, to appear again in the following October. Until the last two years outbreaks of diphtheria could usually be traced to infected persons or carriers newly-arrived from Egypt. This is still the case in Wadi-Halfa and Berber Province, but the disease appears to have established itself as endemic in Khartoum and Omdurman, and these towns must be looked on as a probable centre of dissemination.

INFLUENZA.

An outbreak of influenza occurred at Shambe in the Upper Nile Province. 47 cases were reported with no deaths ; otherwise only sporadic cases were notified.

RELAPSING FEVER. (Darfur)

This epidemic can be said to have been definitely brought under control by the spring of 1928. In May only 6 cases were reported. In July for the first time no cases were reported nor were any reported until September when two small outbreaks occurred. By the end of October the province was again clear of the disease and no further cases occurred up to the end of the year. The

epidemic appears to be definitely at an end.