"They were exposed to a lot of things we are today -- like bacteria, disease, " he notes.
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In normal good health, some bad bacteria that cause disease are crowded out by good bacteria.
He cautions that it is "way too early" to say that the bacteria are causing disease.
OspA is produced specifically by Borrelia burgdorferi, a bacteria that causes Lyme disease.
Meningitis is an aggressive disease when bacteria invade the protective membranes of the central nervous system and cause adverse inflammatory responses.
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They identified a previously unrecorded species of Candidatus, a group of disease-causing bacteria that infect many sorts of plant.
Disease-causing bacteria such as Salmonella survive by modifying these bags in order to avoid these attacks and to multiply.
Pertussis, or whooping cough, is a highly contagious disease caused by bacteria that can lead to severe upper respiratory infections.
The disease is caused by bacteria related to syphilis that enter the body through a tick bite.
Undurraga is particularly concerned about the NARMS findings because it means the consumption of meat is adding to what the director-general of the World Health Organization, Dr. Margaret Chan, last year called a "post-antibiotic era" in which antibiotics will no longer work to fight disease because too many bacteria have developed resistance to it.
Undurraga is particularly concerned about the NARMS findings because it means the consumption of meat is adding to what the director of the World Health Organization, Dr. Margaret Chan, last year called a "post-antibiotic era, " or an era in which antibiotics will no longer work to fight disease because too many bacteria have developed resistance to it.
He and his colleagues have been exploring how altering gut bacteria might influence the risk of heart disease.
Apart from hs-CRP, scientists are looking at mouth bacteria as another possible link between gum disease and heart disease.
Consider meningococcal disease, a rare but devastating bacteria-caused illness that primarily affects infants and children.
The bacteria which can cause fatal lung infection Legionnaires' disease, was discovered in the water system at St Botolph's Court a week ago.
And the same bacteria also cause Reiter's syndrome, a disease whose victims suffer not only inflamed joints, but also inflammation of the eyes and the urinary tract.
Gut bacteria were found to have a surprising role in disease 20 years ago, when Australian scientists showed that stomach ulcers aren't caused by stress, as long thought, but by chronic infection with the stomach bacterium Helicobacter pylori.
Crohn's disease (also suspected of being caused by bacteria) is an inflammation of the bowel.
The bacteria, which can cause the lung infection Legionnaires' disease, was discovered in the water system at St Botolph's Court last week.
This is used to detect antibiotic-resistant bacteria, which are a growing problem for those fighting the disease.
Antibiotics are available to treat gum disease, but they work by wiping out all bacteria, good and bad.
Perhaps, Pei says, exposure to the wrong kind of bacteria, not just acid, is one cause of the disease.
But he said dead bodies, unless they were carrying specific bacteria and viruses, were unlikely to contaminate the water with disease.
New antibiotics are needed to fight the rise of superbugs - bacteria that have become resistant to common antibiotics used to fight disease.
Hindsight and improved medical science has shown that during my short stay in Kabul, I contracted Borrelia bacteria (strains of which in the US cause "Lyme Disease") from ticks, which fell off mice that scampered over my feet during sleep, attracted probably by the bits of sweets given to me lovingly by Madaar (Mother), which I kept in my suitcase under the bed.
Every year new superbugs are emerging bacteria that have mutated around our antibiotic defenses, resulting in untreatable disease.
The conference also heard that good bacteria growing in dental plaque could help fight off bugs that cause gum disease and tooth decay if they are given a competitive edge.
The disease is a potentially fatal form of pneumonia caused by the legionella bacteria.
Disease-causing organisms such as staphylococcus aureus and pneumonia-causing bacteria have been detected in paper bills.
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