Helicobacter pylori infection causes gastric cancer A? review of the epidemiological, meta-analytic, and experimental evidence

Table 1 IARC evaluation of schistosomes, liver flukes and H pylori

Agent (infectionwith)	Degree of evidence of carcinogenicity		Overall evaluation
	Human	Animal
Schistosoma haematobium	Sufficient	Limited	Definite carcinogen
Schistosoma japonicum	Limited	Limited	Possible carcinogen
Schistosoma mansoni	Inadequate	Limited	Not classifiable
Opisthorchis viverrini	Sufficient	Limited	Definite carcinogen
Opisthorchis felineus	Inadequate	Inadequate 1	Not classifiable
Clonorchis sinensis	Limited	Limited	Probable carcinogen 2
Helicobacter pylori	Sufficient	Inadequate 1	Definite carcinogen

¹ No data available.

² Other relevant data taken into account in making overall evaluation.