Word: bacterias
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...common belief that hair dye caused cancer was based on a finding in 1975 by Dr. Bruce G. Ames, director of environmental health at the University of California at Berkeley. Ames observed that hair dye caused mutations in bacteria...
...bubonic plague comes from a bacterium called yersinia pestis which lives in rats. In a dense population of humans and rats, fleas can transfer the bacteria through their bites between the species...
...disease soon changed to the pneumonic variety, by far the deadlier of the two. The bacteria which carry pneumonic plague can be transmitted through water droplets from the lungs of humans--that is, whenever people sneeze. This can bring the disease to epidemic proportions as the bacteria travel from person to person through the air, as happened in Surat...
...fact, excessive use of antibiotics could cause bacteria to become resistant, according to Dr. Lincoln Chen, professor of international health at the School of Public Health. For example, he says, a strain of malaria developed which was immune to the treatment...
Researchers suggest instead that we look to the sea for epidemics. The city of Boston pours tons of pollution and sewage into the water, causing change to the ecosystems. Already algae bloom points to a very unbalanced environment. Perhaps some vicious bacteria is breeding in the sewage, waiting to spread infection by a carrier as apparently innocent as a flea...