Dr. B. P. JoshiCHUDASAMA KRUPALI B.2017-05-022017-05-022013http://krishikosh.egranth.ac.in/handle/1/5810010403The present research work was conducted to study the pathological and epidemiological features related to peripheral neuropathy in the field cases involving hundred birds from ten replacement pullet flocks of ten different layer poultry farms around Anand District in Gujarat. Ten sick birds were selected from each of the ten farms for the study. The affected birds in the flocks included in study exhibited signs of paresis and lameness at an age of eight to nine weeks which lasted for a period of six to seven weeks more. In one flock, the signs were observed upto nine weeks after onset at eighth week. The overall lameness was recorded to be 5.44 per cent which ranged from 4.11 to 9.77 between different farms. All the ten flocks studied for PN were vaccinated against MD with bivalent vaccine HVT + SB1 Merial, both at the hatchery and farm level. The clinical signs observed in the birds affected by PN were characterized byenVeterinary PathologyStudiesThesis