title: Oesophagostomum species in pigs in England. 1. Oesophagostomum quadrispinulatum: description and life-history.
mesh_terms: D000818:Animals; D004739:England; D007814:Larva; D009814:Oesophagostomiasis / Q000469:parasitology / Q000662:veterinary*; D009815:Oesophagostomum / Q000033:anatomy & histology / Q000254:growth & development*; D013552:Swine; D013553:Swine Diseases / Q000469:parasitology*; D013997:Time Factors