149 



Dengue Fever. — Med. Jl. Australia, Melbmrne, 6th May 1916, p. 380. 

 [Received 11th July 1916.] 



Investigations carried out by Dr. J. B. Cleland in connection with a 

 recent outbreak of dengue fever in Murwilhimbah, New South Wales, 

 have led that observer to the conclusion that the disease differs from 

 the Syrian type of dengue in the length of the incubation period, and 

 that it may be a mutant of yellow fever, associated with Stegoniyia 

 fasciata as a carrier of infection. The conclusions of Dr. Cleland are 

 criticised as being based on insuflicient experiments. It is stated that 

 there is no evidence for the view that dengue is a mutant of yellow 

 fever, nor has the incubation period been definitely proved to be seven 

 days, but may be either four or eight days. 



Leonard (T. M. R.). Report on Certain Outbreaks of Yellow Fever 

 in Lagos, 1913, and January and February 1914. — Rept. Yellow. 

 Fev. Commiss. {West Africa) ; Yellow Fev. Bur. Bull., Liverpool, 

 Supplement i. May 1915, pp. 207-316, 38 charts, 1 map. 

 [Received 10th July 1916.] 



Thirty-eight cases of yellow fever were recorded during the period 

 under consideration, eighteen being among non-immune races 

 (European and Syrian) engaged in mercantile or seafaring occupations. 

 Mercantile communities are brought into close contact with natives, 

 while among sailors, infection has been contracted at ports in the 

 Colony other than Lagos. The present and previous records tend 

 to support the view that yellow fever is endemic in Nigeria, 

 implying that infection among natives spreads to some extent and 

 that infected cases, if they recover, acquire an immunity. 

 Endemicity and immunity proceed simultaneously, and in the foci 

 of infection epidemics may occur from time to time. 



O'Brien (J. M.). Report on a Visit to Guayaquil. — Rept. Yellow Fev. 

 Cojnmiss. {West Africa); Yellow Fev. Bur. Bull, Liverpool, 

 Supplement i. May 1915, pp. 317-352, 11 charts. [Received 

 10th July 1916.] 



The limited water supply at Guayaquil, Ecuador, and the consequent 

 necessity for w^ater storage, affords favourable conditions for the 

 breeding of Sfegomyia fasciata. The screening of cisterns is rarely 

 carried out. The inhabitants themselves are immune to yellow fever, 

 but the disease is maintained by the constant influx of non-immunes 

 from the mountains. The absence of fever among young children was 

 marked, and it was also observed that this immunity decreased in 

 later years. 



Dalziel (J. M.) & Johnson (W. B.). Notes on a Visit to Sherbro 

 District. — Yellow Fever Bur. Bull., Liverpool, Supplement ii, 

 August 1915, pp. 527-540. [Received 11th July 1916.] 



Sherbro District, on the coast of Sierra Leone, was visited during the 

 month of February, i.e., during the last part of the rainless season. 

 Stegomyia fasciata was absent from all the locahties investigated. 



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