Selected References These references are in PubMed.
Infections That Can Lead to Cancer Bacteria that can lead to cancer Bacteria are very small living things that are made up of only one cell. A few have even been linked with cancer.
Long-term infection of the stomach with Helicobacter pylori H pylori can cause ulcers. It can also inflame and damage the inner layer of the stomach. Some of these changes could lead to cancer over time, especially cancer in the lower part of the stomach.
H pylori infection is also linked with some types of lymphoma of the stomach. While H pylori infection is a major cause of stomach cancer, most people who have these bacteria in their stomachs never develop stomach cancer.
There is also some evidence that people with H pylori might have a lower risk of some other types of cancer, although it is unclear exactly what role the bacteria plays in this. About 2 in 3 adults worldwide are infected with H pylori.
The rate of infection is higher developing countries and in older age groups. One is the fecal-oral route, such as through contaminated food or water sources. It can also be transmitted from one person to another, mouth to mouth.
Other factors also play a role in whether or not someone develops stomach cancer. For example, nitrites are substances commonly found in cured meats, some drinking water, and certain vegetables.
They can be converted by certain bacteria, such as H pylori, into compounds that have been found to cause stomach cancer in lab animals. Antibiotics and other medicines can be used to treat H pylori infections. According to the CDC, people who have active ulcers or a history of ulcers should be tested for H pylori, and, if they are infected, should be treated.
Testing for and treating H pylori infection is also recommended after removal of an early stomach cancer. Chlamydia trachomatis Chlamydia trachomatis is a very common kind of bacteria that can infect the female reproductive system as well as other parts of the body in both men and women.
It is spread through sex. Although infection of the reproductive organs may cause symptoms in some people, most women have no symptoms. Some studies have found that women whose blood tests showed past or current chlamydia infection may be at greater risk for cervical cancer than women with negative blood test results.
Studies have not shown that chlamydia itself causes cancer, but it might work with HPV in a way that promotes cancer growth. For example, researchers have found that women who had chlamydia along with HPV are more likely to still have HPV when they are re-tested later than women who have not had chlamydia.
Although more studies are needed to confirm these findings, there are already good reasons to be checked for chlamydia infection and have it treated with antibiotics if it is found.
In women, long-term chlamydia infection is known to cause pelvic inflammation that can lead to infertility, mainly by building up scar tissue in the Fallopian tubes.
Like other infections that inflame or cause ulcers in the genital area, chlamydia can also increase the risk of becoming infected with HIV during exposure to an HIV-infected sexual partner.Diseases spoil the health and life of all living beings, whether it is a human or animal or plant or whatever includable.
The term disease in human beings factually means the deviation of the body system from its normal functional state and the changes are indicated by some symptoms. New research on bacteria and viruses that can cause cancer, or alter the risk of cancer, shows that viewing microbes as wholly good or bad may be an oversimplification.
What we’re learning about cancer-causing bacteria and viruses. Infectious agents, such as viruses and bacteria, are the causes of several common cancers. Infection with the bacterium Helicobacter pylori predisposes to gastric cancer.
Chronic infection with HBV, HCV predisposes to hepatocellular carcinoma. Jul 11, · Viruses that can lead to cancer; Bacteria that can lead to cancer; Parasites that can lead to cancer Our growing knowledge of the role of viruses as a cause of cancer has led to the development of vaccines to help prevent certain human cancers.
editors, and translators with extensive experience in medical writing. Last. Jul 11, · Bacteria are very small living things that are made up of only one cell.
Most types of bacteria aren’t harmful, but some can infect people and cause diseases. A few have even been linked with cancer.
While H pylori infection is a major cause of stomach cancer, most people who have these bacteria. Feb 13, · Nevertheless, animal viruses conceivably may cause cancer in humans analogous to human and simian polyomaviruses causing tumors in non-permissive rodents.
Epidemiologic studies to date have provided little evidence that animal viruses and bacteria cause human cancer.