1.
Surveiilance Of Disease Problems & Economic Losses In Commercial Layer Farming In Tehsil Arifwala
by Javid Iqbal, M | Prof.Dr.Muhammad Ashraf | Dr.Muhammad | Dr.Muhammad Athar Khan | Faculty of Veterinary Sciences.
Material type: ; Format:
print
Publisher: 1998Dissertation note: The main objective of the present study work was to investigate the prevalence of various diseases and economic losses resulting because of various factors among the commercial layer farming in Tehsil Arif Wala. The farms having housed birds 5000 - 15000 were visited in this study work. The project was divided into two portions. The data of retrospective study revealed total mortality of 16.44% ( 58725/357100 ) due to various diseases. Highest mortality was due to gumboro (27.50%) followed bt leukosis (26.38%), Newcastle disease (15.33% observed only in one farm) early chick mortality ( 5.06%), heat stress ( 4. 14 %), coryza (3.09%) and Salmonellosis ( 1.98% ). The diseases in which the mortality was less than 2% were E-coli, Coccidiosis, C.R.D., I.B., Aspergillosis, Enteritis and Pox.
In active surveillance mortality was 27.28% (52019/190700) clue to various diseases. Highest mortality was due to Icukosis (24.57%) followed by Marek's disease (12.98%), early chick mortality (12.75%), gumboro (10.54%), C.R.D. (7.39%), Aspergillosis (7.10%), E-Coli (6.75 %), Coayza (4.81%), saimonellosis (4.33%) and enteritis
(3.86%). The diseases in which the mortality was less than 3% were
Coccidiosis, l.B., and Heat Stress.
In retrospective study economic losses by different factors were chicks ( 25.61%), feed (67.31%) and medicine (7.08%). In active surveillance economic losses due to different factors were chicks (32.29%), feed (62.53%) and medicine (5.18%).
From this study it is concluded that viral infections such as gumboro, leukosis, Marek's and N.D. are important in layers responsible for high mortality and economic losses. Therefore, it is recommended that proper vaccination should be done and propel vaccination schedule should be adopted
The diagnosis of each disease was made by clinical findings and postmortem findings but in case of active surveillance, the diagnosis of Salmonelosis was confirmed by the laboratory tests. A questionnaire was also designed to collect the data from each farm that was related to morbidity rates, mortali rates , vaccination, susceptible age , managemental faults & economic losses for various diseases.
Availability: Items available for loan: UVAS Library [Call number: 0581,T] (1).
