| What causes infectious
diseases? Germs, or microorganisms, as they are
called by scientists. The most common
microorganisms are bacteria and virus, but others
are fungi, protozoans, and worms. Bacteria, which
are one-celled organisms, and viruses, which are
even smaller, are mainly [parasites]
that multiply sometimes with astonishing
speed. |
|
| FACT: A single cell of E.
coli bacterium in the intestines could multiply,
with optimum conditions, so that in 3 days its
descendants would weigh as much as the entire
earth. |
|
..BATTLE AGAINST DISEASE
