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i;i LLETIN 36, PUERTO RICO EXPERIMENT STATION 
ERADICATION OF PARASITES 
The only effective means of control of some of the diseases and par- 
asites i- by island-wide eradication campaigns. Such campaigns are 
comparatively simple because Puerto Rico is an island and the terri- 
tory to be covered is small. The cattle tick and liver fluke are two 
serious parasites thai should be eradicated ;it this time. In the 
United States the eradication of the cattle tick Is being accomplished 
by proper dipping of all cattle and horses in a given ana. nt 1 1-day 
intervals over a period of 9 month-. The State of California has 
completed a campaign of eradication of the liver fluke in sheep by 
destroying the snail which transmits the parasite. Puerto Rico 
needs more and better Livestock and a Larger and better dairy in- 
dustry, and these objects can be promoted greatly by eradication of 
the tick and liver fluke. 
US GOVERN*! 1 ." rt N"SG OFFICE: 1934 
