528 
THOMPSON YATES LABORATORIES REPORT 
Oct. 17. Taken ill, the symptoms commencing in the morning ; the attack ascribed to going 
out the previous evening without a hat. Lay down for a while before dejeuner, 
at which meal ate nothing, as everything ' tasted nasty.' Soon after had a 
shivering fit, and about noon temperature was 40°, there was some sweating ; the 
temperature was taken at frequent intervals, and remained about 40°. At 6 p.m., 
temp., 397 0 ; pulse, 114 ; face, pale ; hot dry skin ; no pain ; no cough ; no 
vomit ; no diarrhoea ; on the left wrist were noted five neat mosquito bites (rather 
typical). 
,, 18. Morning temperature, 38 - 5° ; rather uneasy mentally. 5 p.m., temperature 40 0 , 
pulse, 100 ; no icterus or vomiting. On this as on the previous day we desired 
to test for albuminuria but, promises notwithstanding, we could not obtain a 
specimen. 
„ 19. The fever has abated to about 38 0 ; no icterus. Patient was weak and pulled down 
and returned to his ordinary occupation about the twenty-fourth. 
(About ten days later — October 28 — patient's wife was laid up for a few days, but 
probably no importance should be attached since this was the case intermittently, 
chiefly, apparently, on account of the climate, which generally does not cause 
European women to thrive.) 
Case 5. Female Portuguese (25). Arrived in Para, July 17, 1900, and has lived 
all the time at the Institute. 
Oct. 18. Taken suddenly ill ; much headache and photophobia ; bilious vomiting ; tempera- 
ture, 38 - 5°. The temperature was above 38 0 for the next two days ; on the 
twentieth and twenty-first there was slight albuminuria ; on twenty-second 
temperature fell to normal. There was no icterus. 
About this time, or a little later (dates and notes lost) another Portuguese (case 7) 
was ill with a passing attack of fever, of undetermined nature. Our Chalet was 
situated between that of the last patient, this patient, and the Chalet G. We watched 
the course of the attacks with some interest, as it might afford interesting data con- 
cerning the spread of yellow fever. It came out that in the month of July, 1900, 
an occupant of one ot the chalets had had severe yellow fever, and had died during 
transference to the yellow fever hospital. Before discussing further, it may be stated 
that no Anopheles were discovered about the institute ; the nearest breeding-place 
that was found was three-quarters of a mile away. Except cases A and B, moreover, 
probably none of the cases were malarial. Case 5 is of interest from the malarial 
history, but I think that, probably, his illness was yellow fever of a typical character 
as occurring in an ' immune,' especially from the slowness of the pulse {e.g., 114 when 
temperature was 39.7 = 103-4 0 fahr., and again 100 when temperature was 40= 104 0 
fahr.) ; there was no anaemia such as was observable in many other slight malarial 
attacks, nor were there subsequent fever attacks ; lastly, there was no actual inter- 
mittence ot fever or typical ague attack during the illness, which lasted but a few 
days. With regard to Case 2 there can be no doubt that this was yellow fever, and 
