تلخیص
The overall prevalence of tick infestation was 14.7 % on commerciallayers (n = 12000) examined from different private poultry farms located in district Faisalabad. Only one species, Argas persieus, was identified from the infested birds. Tehsilwise prevalence was 8.2, 23.5 and 12.5 % in Faisalabad, Samundri and Jaranwala, respectively. Economic loss due to blood sucked by Argas persieus infestation on commercial layers has also been estimated. Argas persieus burden was 3.25 per bird and a single tick sucked an amount of 18.57 mg blood daily and 0.06 g per bird. Total amount of blood sucked annually from the existing layer population was 14,17,706 kg resulting into an annual loss of rupees 2.13 million. Key words: economic significance, layers, prevalence of Argas persieus