The house sparrow Passer domesticus (L.) was the most commonly found resident bird of the country, inhabiting almost all types of ecosystems throughout the year. House sparrows harbor different types of chewing lice, with a wide range of population dynamics. In the present study, the house sparrow Passer domesticus (L.), was examined for chewing lice (Insecta: Phthiraptera) population with seasonal effects on infestation in Sindh Province, Pakistan, during 2016–2017. A total of 177 birds were examined in the upper, central, and lower Sindh regions. Five species of chewing lice were reported, and their population intensity on the host body were recorded. The data were taken by a random sampling method. Brueelia cyclothorax (77.52%) was the most prevalent louse species and P. fringillae (0.77%) was the least prevalent. The frequency of lice species was also recorded significant for B. cyclothorax (59.75%) and the least frequent species was P. fringillae (0.178%). The Fisher's Exact Test showed a non-significant difference between frequencies of lice and their prevalence of infestation in birds (p > 0.05). The seasonal and geographical distributions of the population of lice were analyzed by the Z-test which showed the spatial frequency was significantly variable (p < 0.05) in the lower Sindh region (40.7%) and temporal frequency was significantly variable (p < 0.05) in the winter season (57.87%). The correlation between the lice infestation and some intrinsic (body weight of birds) and extrinsic factors (humidity and temperature) was also studied. The mean intensity of chewing lice with the confidence interval (95%) was recorded highest for B. cyclothorax i.e. 6.68 ± 0.27 (6.13–7.23). The relative abundance in all the three regions showed independent distribution of chewing lice throughout the Sindh region on house sparrows. This is the first ecological study of chewing lice on house sparrows in Sindh, Pakistan.

麻雀Passer domesticus（L.）是该国最常见的常住鸟类，全年栖息在几乎所有类型的生态系统中。麻雀窝藏着各种类型的咀嚼虱子，种群动态广泛。在本研究中，对麻雀Passer domesticus（L.）在2016-2017年期间在巴基斯坦信德省的咀嚼虱（Insecta：Phthiraptera）种群进行了季节性调查，以调查其侵染情况。在信德河的上部，中部和下部共检查了177只鸟。报告了五种咀嚼虱子，并记录了它们在宿主体内的种群密度。数据通过随机抽样方法获得。布鲁氏菌（77.52％）是最流行的虱子物种，而小穗锈病（0.77％）是最不流行的虱子。虱子种类的频率也被记录为显著B. cyclothorax（59.75％）和至少频繁种为P. fringillae（0.178％）。Fisher精确检验表明，虱子的频率与它们在鸟类中的侵染率之间没有显着差异（p > 0.05）。通过Z检验分析了虱子种群的季节和地理分布，结果显示信德河下游地区（40.7％）的空间频率显着变化（p <0.05），时间频率显着变化（p<0.05）（57.87％）。还研究了虱子侵染与某些内在因素（禽类体重）和外在因素（湿度和温度）之间的相关性。记录到的气胸双歧杆菌咀嚼虱子的平均强度和置信区间（95％）最高，即6.68±0.27（6.13-7.23）。这三个区域的相对丰度显示麻雀在整个信德省地区的咀嚼虱子独立分布。这是巴基斯坦信德省对麻雀咀嚼虱子进行的第一个生态研究。