Evaluation of the WHO nematode egg guidelines for restricted and unrestricted irrigation

aguas residuales ascaridia galli ascaris lumbricoides chickens children contamination effluents enfant evaluation helminthe helminths helmintos hortalizas infecciones por nematodos irrigation legume mexico mexique nematoda nematode infections oms ova ovule pollo poulet reino unido riego risk factors tratamiento de aguas residuales united kingdom vegetables wastewater wastewater treatment who