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目的 了解京津地区流浪犬及家养犬消化道寄生虫感染情况. 方法 2016年6月-2017年7月采集京津地区家养犬及流浪犬粪便标本.采用醛醚沉淀法查寄生虫虫卵. 结果 流浪犬及家养犬消化道寄生虫总感染率为52.99％,其中流浪犬感染率为79.68％,家养犬感染率为22.56％,差异有统计学意义(x2=114.43,P＜0.05).犬消化道蠕虫、原虫感染率分别为39.32％和28.49％.蠕虫感染中犬钩虫、犬蛔虫、绦虫、华支睾吸虫感染率分别为25.64％、15.67％、0.57％和5.70％,优势种为犬钩虫和犬蛔虫.流浪犬犬钩虫、犬蛔虫、绦虫、华支睾吸虫、原虫感染率分别为45.99％、22.46％、0.68％、9.09％和40.64％,家养犬对应寄生虫感染率依次为2.44％、7.93％、0.61％、1.83％和14.63％,流浪犬犬钩虫感染率与家养犬比较差异有统计学意义(x2=86.91,P＜0.05).感染犬中多重感染占32.26％,流浪犬多重感染占比37.58％与家养犬多重感染占比10.81％比较差异有统计学意义(x2=9.72,P＜0.05). 结论 京津地区犬消化道寄生虫感染率较高,以流浪狗犬感染情况更为严重.“,”Objective To ascertain the prevalence of gastrointestinal parasites in stray and pet dogs in the Beijing-Tianjin region.Methods Fresh fecal samples were randomly collected from pet dogs and stray dogs in the Beijing-Tianjin region from June 2016 to July 2017.Eggs in fecal samples were concentrated by aldehyde-ether precipitation and examined under a microscope.Results The overall prevalence of a parasite was 52.99％,the prevalence of a parasite in stray dogs was 79.68％,and the prevalence of a parasite in pet dogs was 22.56％.The prevalence of a parasite differed significantly between stray dogs and pet dogs (x2 =114.43,P＜0.05).The rate of gastrointestinal infection with a helminth was 39.32％,and the rate of gastrointestinal infection with a protozoan was 28.49％.Helminths included Ancylostoma caninum (25.64％),Toxocara canis (15.67％),Dipylidium caninum (0.57％),and Clonorchis sinensis (5.70％).The two most common species were A.caninum and T.canis.The parasites found in stray dogs were A.caninum (45.99％),T.canis (22.46％),D.caninum (0.68％),C.sinensis (9.09％),and protozoa (40.64％).A.caninum (2.44％),T.canis (7.93％),D.caninum (0.61％),C.sinensis (1.83％),and protozoa (14.63％) were also found in pet dogs.The prevalence of A.caninum differed significantly between stray dogs and pet dogs (x2 =86.91,P＜0.05).The rate of a mixed infection was 32.26％ in all infected dogs,37.58％ in stray dogs,and 10.81％ in pet dogs.The rate of a mixed infection of parasites differed significantly in stray dogs and pet dogs (x2 =9.72,P＜0.05).Conclusion Dogs,and especially stray dogs,in the Beijing-Tianjin region are seriously infected with gastrointestinal parasites.