

Various species of these parasites 
cause a number of tropical diseases of 
man and animals. 
The organisms are spread by the 
biting tsetse-fly (G/oss?za) which inhabits 
dense wet places. 
Sleeping sickness is sométimes treated 
by drugs. 
Our best means of fighting the 
disease is by controlling the insect-carrier. 
The most effective control measures are: 
1. Prevention of fly breeding by re- 
moval of sheltering bush. 
2. Control of infected human beings 
and animals so that flies may 
not acquire infection. Inspection 
and quarantine will accomplish 
this. 
3. Protection of healthy persons against 
fly bites. Proper clothing and 
screening and avoidance cf dan- 
gerous localities are the means. 
Marked success has attended the 
fight against the tsetse-fly. 
OTHER INSECT-BORNE DISEASES 
There are a great number of other 
diseases which depend for their existence 
upon insect-carriers. A few of these are 
treated in the Public Health exhibits. 
Diseases of Man: Typhus fever is 
a disease which was once very prevalent 
in army camps. _ It is caused by a para- 
site which is transmitted by the bite of 
the body louse. 
Modern sanitary methods have 
brought it largely under control. 
Il 
OTHER INSECT-BORNE DISEASES 
Specimens of the insect and pictures 
of its native haunts are in WALL 
CASE to. 
A sample of Atoxyl (the drug used) 
is shown. 
CHART 26 summarizes the contro] 
measures. 
A model in WALL CASE to helps 
to visualize this process. 
Another model shows a quarantine 
camp. 
A small chart gives the drop in death 
rate in one instance. 
A large wax model of the body louse 
will be found in a case at the entrance 
to the Hall, and specimens of it are 
in WINDOW CASE 3. 
The upper shelf of WALL CASE to 
is devoted to typhus control, and a 
chart in the center indicates the 
effectiveness of the campaign. 
a ee a 
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