You can refer book for Animal Health Worker by Indian Author.
Book Name-Veterinary Parasitology at a Glance
Author Name-by S. C. Mandal
Price-Rs.480(aproximately)
Link : http://www.amazon.in/Veterinary-Parasitology-at-Glance-Mandal/dp/818189510X/ref=lp_4149703031_1_2?s=books&ie=UTF8&qid=1493626760&sr=1-2