Four cell lines were from Dermacentor variabilis and {TAIL ~ two cell lines} were from {HEAD ~ Dermacentor parumapertus}  
Four cell lines were from Dermacentor variabilis and { TAIL ~ two cell lines } were from { HEAD ~ Dermacentor parumapertus }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH