options ps=54 ls=76;

data westnile;
infile 'C:\data\westnilesc.dat';
input cnty $ 1-24 wnbird 25-27 wnequine 34-35  farms 40-43
 pop 53-59 humdens 61-67 posbrdrt 71-79 poseqnrt 83-91;
logfarms = log(farms);
pbrxhd = posbrdrt*humdens;
run;

proc genmod;
model wnequine = posbrdrt humdens pbrxhd / dist=poisson link=log 
offset=logfarms;

run;
quit;