12 



^^'e have no new morphological details to add, excepting tlie 

 three duct-like threads which connect the viscus-like organ with 

 the head of the embryo. Tliese must l)e looked for as soon as the 

 motions of the parasite become slow enough to permit tlie use of 

 an oil-immersion lens, for the granular degeneration, which sets 

 in soon after motion ceases, obscures all finer details. 



(4) Photographing the embryo. — It is quite difficult to obtain 

 good high-power photographs of the live filaria, and Mr. Martin's 

 success followed only the most ])ersistent efforts. Tlie ray filter 

 must be dispensed with and the photograph taken very soon after 

 the embryo is exposed to the rays of the electric arc, as it 

 undergoes rapid granular degeneration and its motions cease much 

 sooner than when sul^jected to ordinary daylight. 



PREVALENCE OF THE DISEASE IN THE PHILIPPINE 

 ISLANDS. 



There seems to be little positive information as to the extent to 

 which the disease prevails in these Islands. Strong's case, as 

 mentioned, had resided in Iloilo for two years. Calvert's cases 

 came from northern and southern Luzon. Scheube, in his map 

 showing the geographical distribution of filariasis, included this 

 island but none of the southern islands of the group. We have 

 not had time to go into this side of the subject thoroughly, but 

 inquiry shows that physicians who have been in Manila for from 

 ten to forty years have only rarely encountered cases of chy- 

 luria or chylocele. Elephantiasis seems to be absent and filarial 

 lymphangitis and varicose lymj)h glands may have been over- 

 looked in the past. One other case of chyluria was seen in a 

 Filipino this year by Dr. Bartels, but the patient left for the 

 provinces before his blood could be examined. Several English 

 physicians say they have seen cases of filariasis at Iloilo.' 



It seems that the disease may be imported into localities where 

 the conditions for its transmission are apparently unfavorable. 

 Our patient has been living with four other Japanese during four, 

 three, three, and two years, respectively. An examination of 

 these four and of a number of other Japanese living in their 

 neighborhood was made late at night with negative results. This 

 is rather surprising when one considers that Cidex fatigans, the 



' Since the above was written Mr. Hare of this Laboratory has encountered 

 one case of filarial lymph scrotum in a Filipino residing in Manila. The 

 embryos were found in the peripheral circulation. — R. P. S. 



