The invention also provides compositions and methods for determining {HEAD ~ the presence} of {TAIL ~ E. canis antigens} and antibodies 
The invention also provides compositions and methods for determining { HEAD ~ the presence } of { TAIL ~ E. canis antigens } and antibodies
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH