Nématologi ya iku ngèlmu prakara  biologi nématoda (cacing gilig). Nématoda kagolong avertèbrata wigati amarga ana anggotane dadi  parasit wigati ing babagan kèséhatan/kèdoktèran lan pertanian.
Pira-pira kasus kècacingan disebabaké nématoda lan nématologi ana ning posisi kang wigati kanggo ngelola lelara iki. Pira-pira gangguan produksi ternak lan tuwuhan uga merlukake babagan iki seng nyebabke kerugian gedhé seng  diakibabke nematoda parasit.

Federasi lan Kumpulan Nematologi ing Ndonyo 
Afro-Asian Society of Nematologists (AASN)

Australian Association of Nematologists (AAN)

Brazilian Nematological Society (Sociedade Brasileira de Nematologia) (SBN)

Chinese Society of Plant Nematologists (CSPN)

Egyptian Society of Agricultural Nematology (ESAN)
European Society of Nematologists

International Federation of Nematology Societies (IFNS)

Italian Society of Nematologists (Societa Italiana di Nematologia) (SIN)

Japanese Nematological Society (JNS)

Nematological Society of India (NSI)

Nematological Society of Southern Africa (Nematologiese Vereniging van Suidelike Afrika) (NSSA)

Organization of Nematologists of Tropical America (ONTA)

Pakistan Society of Nematologists (PSN)     
  
Russian Society of Nematologists (RSN)

Society of Nematologists (SON)

Delengan uga 
 Pratélan cabang biologi

Zoologi