To assess the risk of zoonotic pathogen transmission as function of stray dog presence and health status, a cross-sectional study was carried out in a large city of southern Mexico that lacks comprehensive strategies for the control of stray canine populations. The photographic capture-recapture method was used to estimate the density of dogs/km2. In the same way, dog feces from 14 public parks of the city were collected to determine the prevalence and intensity of infection with gastrointestinal parasites. The canine population was estimated between 65 and 80 thousand dogs, with a population density of 1,081 dogs/km2, mostly males (71.4%). A high proportion of dogs (72.3%) were found to be in good body condition score (BCS 3). The person:dog ratio was 2.3. The likelihood of being in the BCS 2 category was lower in areas with a higher density of dogs. All feces collected from the parks contained eggs of intestinal parasites, most of them with a medium (42.9%) to high (35.7%) infection intensity, notably Ancylostoma caninum. It was recorded that cases with a low-intensity of GI infection showed polyparasitism (35.7%) associated with A. caninum. There is a large population of stray dogs that roam freely in the streets of Campeche city with access to sources of food, which is reflected by their good BCS, and dogs do not have access to preventive medicine programs (de-worming) and thus contaminate public parks with feces with significant parasitic egg loads of zoonotic importance.
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机译：为了评估人畜共患病病原体传播与流浪狗的存在和健康状况有关的风险，在墨西哥南部的一个大城市进行了一项横断面研究，该城市缺乏控制流浪犬种群的综合策略。用照相捕获-捕获法估计狗的密度/ km 2 。以同样的方式，收集了该市14个公园的狗粪，以确定胃肠道寄生虫的感染率和感染强度。犬的数量估计在65至8万只狗之间，人口密度为1,081只狗/ km 2 ，其中大多数为雄性（71.4％）。发现高比例的狗（72.3％）身体状况得分良好（BCS 3）。人与狗的比例为2.3。在狗密度较高的地区，进入BCS 2类别的可能性较低。从公园收集的所有粪便均含有肠道寄生虫卵，其中大多数感染强度为中度（42.9％）至高（35.7％），特别是犬小食囊虫。据记录，胃肠道感染强度低的病例表现出与犬曲霉菌相关的多寄生性（35.7％）。大量流浪狗在坎佩切州的城市街道上自由漫游，能够获得食物，这是由其良好的BCS所反映的，并且这些狗无法获得预防性医学计划（驱虫）并因此受到污染带有大量寄生虫卵且具有人畜共患病重要性的粪便的公园。
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