PHLEBOTOMUS FEVER 647 



fever, Chitral fever, and the seven-day fever or simple continued 

 fever of India. Of these, that presenting the most definite 

 clinical picture is dengue, a condition for long well known and 

 having an extensive distribution, and it may be said that 

 Ashburn and Craig in the Philippines found the blood in dengue 

 as in pappataci to be infective even after filtration. Whether 

 all tlie.se disease conditions are identical further research must 

 decide; at present Birt believes that at any rate pappataci 

 and dengue are distinct, and certainly Doerr does not in his 

 description allude to the terminal skin eruption which Manson 

 believes to be of very constant occurrence in the latter. The 

 rarity of a fatal result in these diseases makes their investiga- 

 tion by inoculation of the human subject relatively safe. 



