38 
North Carolina Experiment Station 
4 to 5 months of age. Of the 33 hospital cases studied, 24 or 72.7 per cent 
died, and 9 or 27.3 per cent resisted the disease. It is probable that all of 
these birds had ingested the germ before the vaccine administered could 
become effective, and body immunity against the disease be built up. The 
eight cases isolated July 4th had such well-defined symptoms of the disease 
that vaccination represented only an experimental procedure. Positive con¬ 
clusions as to the efficacy of vaccination of birds showing symptoms of the 
disease cannot be definitely arrived at, although it is quite possible that some 
beneficial effect is derived from same. From a practical standpoint, the 
vaccination of sick birds is to be strongly advised against, such birds should 
be destroyed because of the fact that they might become carriers. 
Two vaccinations were given all birds, including range chicks. 
Figures 13, 14, and 15 are hospital temperature charts showing fluctuation 
of the body temperatures of 33 birds with fowl typhoid. Of the 33 hospital 
cases, 9 or 27 per cent recovered. The temperature may be erratic, that is, up 
one day with a drop on the following day, only to rise again on the succeed¬ 
ing day. The temperature varies according to the severity of the disease, 
rising from a normal temperature of 107.3° F. to as high as 113°F. In this 
outbreak, the course of the disease varied, some birds dying the same day 
or the following day of the initial symptoms, while others would live four 
or even five days and then die, or the sub-acute cases recover after a lapse of 
four or five days. 
