1547313

9789283212614

Schistosomes, Liver Flukes and Helicobacter Pylori

Schistosomes, Liver Flukes and Helicobacter Pylori
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  • ISBN-13: 9789283212614
  • ISBN: 9283212614
  • Publisher: World Health Organization

AUTHOR

International Agency for Research on Cancer Staff

SUMMARY

Evaluates the carcinogenic risk to humans posed by infection with three schistosoma trematodes, three liver flukes and the bacterium Helicobacter pylori. These biological agents were selected for evaluation on the basis of evidence suggesting a causal association between infection and the development of human cancers. The first monograph assesses data on Schistosoma haematobium S. mansoniand S. japonicum, the three species which account for the vast majority of schistosomal disease in humans. The most extensive sections evaluate the results of studies of cancer in humans and experimental animals, concentrating on the strength of evidence linking infection with S. haematobium to squamous-cell carcinoma of the urinary bladder, and infection with S. mansoni or S. japonicum to an increased risk for cancers of the gastrointestinal tract. The monograph concludes that infection with S. haematobium is carcinogenic to humans and that infection with S. japonicum is possibly carcinogenic to humans; infection with S. mansoni could not be classified. The second monograph on liver flukes evaluates data on Opisthorchis viverrini O. felineus and Clonorchis sinensis. These foodborne trematodes establish a chronic infection of the bile ducts and more rarely the pancreatic duct and gall-bladder of humans and other mammals. Most carcinogenicity data centre on the possibility that these trematodes are involved in the development of cholangiocarcinoma or liver cancer. The monograph concludes that infection with O . viverrini is carcinogenic to humans and that infection with C. sinensis is probably carcinogenic to humans; infection with O. felineus could not be classified. The final monograph evaluates data on Helicobacter pylori. More than half of the world's population may be infected with this bacterium, which is responsible for most cases of chronic gastritis and duodenal ulcer. Citing several studies linking infection to gastric cancer in humans, the monograph concludes that infection with H. pylori is carcinogenic to humans.International Agency for Research on Cancer Staff is the author of 'Schistosomes, Liver Flukes and Helicobacter Pylori' with ISBN 9789283212614 and ISBN 9283212614.

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