An Unexpected Cause of Eye Irritation: A Case of Zoonotic Ocular Onchocerciasis

Table 1

Morphologic features of zoonotic Onchocerca species and their chief identifying feature.

Onchocerca sp.	Identifying characteristics
O. guttorosa (cattle)	Four striae per interridge
O. cervicalis (horses)	Three to four striae per inter-ridge
O. lupi (wolves, cats)	Two internal striae per every inter-ridge
O. jakutensis (European deer)	Three to four elongated striae per inter-ridge
O. dewittei japonica (wild boar)	Marked external transverse with no inner striae [13].