title: Contamination of soil in two city parks with canine nematode ova including Toxocara canis: a preliminary study.
mesh_terms: D000723:Ancylostomatoidea / Q000302:isolation & purification; D000818:Animals; D001199:Ascaridoidea / Q000302:isolation & purification; D004283:Dog Diseases / Q000453:epidemiology; D004285:Dogs / Q000469:parasitology*; D005243:Feces / Q000469:parasitology; D009348:Nematoda / Q000302:isolation & purification*; D009349:Nematode Infections / Q000453:epidemiology / Q000662:veterinary; D010414:Pennsylvania; D012989:Soil Pollutants / Q000302:isolation & purification*; D014119:Toxocara / Q000302:isolation & purification*; D014258:Trichuris / Q000302:isolation & purification
chemical_list: D012989:Soil Pollutants