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However, liver and stomach cancer are primarily due to infectious causes. Liver cancer is largely caused by infectious hepatitis B virus (HBV) plus hepatitis C virus (HBC) and stomach cancer is largely caused by Helicobacter pylori bacteria. World-wide, the estimated number of people chronically infected with HBV and/or HCV is ~325 million. [8]
Some infectious agents are linked to increased risk of cancer in their host organisms. The articles in this category pertain to such infectious agents, the vaccines that prevent infection by these agents, the names of the cancers linked to, associated with, caused by and/or have an increased risk of developing from these infectious agents.
Worldwide, approximately 18% of cancer deaths are related to infectious diseases. [3] This proportion ranges from a high of 25% in Africa to less than 10% in the developed world. [3] Viruses [66] are the usual infectious agents that cause cancer but bacteria and parasites may also play a role. Oncoviruses (viruses that can cause human cancer ...
Worldwide, approximately 18% of cancer cases are related to infectious diseases. [9] [60] This proportion varies in different regions of the world from a high of 25% in Africa to less than 10% in the developed world. [9] Viruses are the usual infectious agents that cause cancer but bacteria and parasites also contribute. Infectious organisms ...
Researchers looking for HPV among 1,633 lung cancer patients and 2,729 people without the lung disease found that people with lung cancer had more types of HPV than noncancer patients did, and among lung cancer patients, the chances of having eight types of serious HPV were significantly increased. [80]
Bacteria involved in causing and treating cancers. Cancer bacteria are bacteria infectious organisms that are known or suspected to cause cancer. [1] While cancer-associated bacteria have long been considered to be opportunistic (i.e., infecting healthy tissues after cancer has already established itself), there is some evidence that bacteria may be directly carcinogenic.
Percentage of people infected with hepatitis C in 2015. The hepatitis C virus is the cause of hepatitis C and some cancers such as liver cancer (hepatocellular carcinoma, abbreviated HCC) and lymphomas in humans. [1] [2] [3] An oncovirus or oncogenic virus is a virus that can cause cancer. [4]
This means that while carcinogens are capable of causing cancer, it does not take their risk into account, which is the probability of causing a cancer, given the level of exposure to this carcinogen. [2] The list is up to date as of January 2024. [3]