316 
Oriental Sore 
are compatible with this view. It is a fly that has been suspected in 
other places, so that until further work is undertaken the question must 
remain undecided. I hope during the coming summer to re.sume the 
experiments and to obtain some further light on this interesting but 
difficult question. 
Conclusions. 
1. Oriental sore as it occurs in Bagdad does not differ essentially 
from that of other places. There may however be a variation in the 
virulence and duration of the Oriental sore in different parts of the 
world. 
2. The Oriental sore attacks practically all natives of Bagdad 
generally between the ages of 1 and 3 years. Newcomers usually 
become infected within a year or two after ax’rival. 
3. Occasionally individuals may escape infection though exposed to 
it for years. 
4. There may be one, two or three sores at one time. More rarely 
there are more. Sometimes there are as many as twenty-three and 
even greater numbers are talked of in Bagdad. 
5. Whether single or multiple the Oriental sore rarely appears on 
any but an exposed surface of the body, e.g, face, fore-arm, leg, hand or 
foot. 
6. One attack confers absolute immunity for the rest of life. It is 
possible that the sore of Aleppo may not produce absolute immunity 
against the sore of Bagdad. The same may be true of other places. 
7. From inoculations from man to man it is demonstrated that the 
incubation period is about two months. 
8. Inoculation with juice from a sore as in vaccination against 
smallpox produces a single sore at the point of inoculation only. From 
this it is concluded that in cases of multiple sore each sore is a separate 
inoculation by the transmitting agent or a subinoculation by a house-fly 
or by the individual himself. 
9. There is a seasonal prevalence of the disease. Though they may 
appear at any time of the year, sores most usually make their appearance 
during the months of September, October and November at the close of 
the hot season. 
10. The duration of the disease is from twelve to eighteen months. 
11. The sore commences as a small papule which increases in size. 
It may then ulcerate and extend (female sore of Bagdad) or it may 
remain dry with a scaly scab on the surface (male sore of Bagdad). 
