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