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Anthrax (Deadly Diseases and Epidemics) by Janet M. Decker

By Janet M. Decker

Specialists within the box of microbiology inform the nice detective tales of the way many of the world's best-known lethal disease-causing microbes have been first remoted, pointed out, and studied. Readers learn the way those lethal viruses and micro organism reason sickness and what steps were taken to get rid of them. most ordinarily linked to animals equivalent to farm animals, the infectious sickness anthrax lately entered the highlight for its strength use as a weapon of organic war opposed to people.

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Extra resources for Anthrax (Deadly Diseases and Epidemics)

Example text

The toxins that cause tetanus and botulism are neurotoxins. They interf e re with signals from motor neurons to muscle fibers. Botulism is caused by a bacterium that normally lives in the soil, Clostridium botulinum . The bacteria usually grow only in the absence of oxygen. If food containing Clostridium is improperly canned, allowing spores to s u rvive, the spores germinate and the vegetative cells produce toxin. Botulism toxin is colorless and odorless and can be d e s t royed by cooking.

In h a l a tional anthrax is the most de adly form of anthrax. Even with anti bi o tic tre a tment, most pati ents die. Su rvival of six out of the first ten people who devel oped inhalati on a l anthrax in the 2001 bi o terrorist attacks was mu ch higher than what was predicted. 41 4 How Anthrax Causes Disease Pathogens (disease-causing microbes) cause illness in several ways. One method is for the pathogens to hide from the immune sys tem, so that they are not killed before they can reproduce and spread to another host (the infected human or animal).

Bacteria form spores when conditions are unfavorable for survival. Two groups of pathogenic bacteria, Bacillus and Clostridium , can make spores. Clostridia live in the soil, but if they get into wounds or food they can cause tetanus, botulism, food poisoning, and gas gangrene. Molds and mushrooms (fungi) also form spores when they re p ro d u c e . Bacteria make spores when food is scarce, their environment becomes too hot or too dry, or when oxygen levels increase. First, each growing bacterial cell (the vegetative cell) makes a copy of its DNA.

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