VPA 221: Veterinary Entomology and Acarology (1+1)

Sarcoptes vz Psoroptes

DIFFERENCE BETWEEN SARCOPTES AND PSOROPTES

SARCOPTES	PSOROPTES
Sarcoptes, causes scabies of man and sarcoptic mange of sheep, goats, cattle, pigs, equines, dogs, foxes, rabbit and other animals Notoedres, causes notoedretic mange of cats, rabbits and rats Cnemidocoptes affects  fowls	Psoroptes causes psoroptic mange of sheep, goats, cattle, equines and horses Otodectes, causes otodectic mange of dogs, foxes, cats and ferrets Chorioptes causes chorioptic mange of equines and cattle
Morphological features
Body globose	Body oval
Integument covered with scales and spines (presence of 6 dorsal conical spines)	No dorsal spines
Legs are short	Legs are longer and project beyond the margin of the body
Bell shaped suckers (caruncles) on stalks (pedicels) on the tarsi of some or all legs	same
Pedicels of the tarsal suckers not segmented	Pedicels long and composed of three segments in Psoroptes, short and not segmented in Otodectes and Chorioptes
Legs 3 and 4 of the females alone end in bristles instead of suckers	Legs 3 of females only bear terminal bristles and not suckers, while legs 4 of both Psoroptes and Chorioptes bears suckers.  Leg 4 of female of Otodectes is feebly developed and without suckers, leg 4  of all the males shorter than leg 3
Anus terminal	Anus terminal
No adanal suckers (copulatory discs) in males	Males with adanal suckers on the posterior end of abdomen
Posterior margin of the abdomen of male is not bi lobed	Posterior margin of the abdomen of the male is produced into two lobes which are prominent in Psoroptes and Chorioptes but not so in Otodectes