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Are all microorganisms harmful?
Beneficial microorganisms Harmful microorganisms
intestinal flora
food
antibiotics
pathogenic microorganisms
spoilage
decomposer microorganisms
plankton
illnesses
Infection
headache
vomiting
fever
Illnesses caused by microorganisms
Transmission
sexual transmission
in food or water
in air
skin
Female Anopheles mosquito
Plasmodium
Malaria
CLOSEBACK
Mortality of someinfectious diseases
Illnesses caused by microorganisms
Transmission
sexual transmission
in food or water
in air
skin
Number of deaths per 100,000 inhabitants
Pneumonia
Tuberculosis
Diarrhea
1900 1910 1920 1930 1940 1950 1960 1970 1980
250
200
150
100
50
Protection against infectious disease
ResourcesVaccinesAntibiotics
Alexander Flemingdiscovered penicillin.
Wash your hands before eating.
Eat fresh food.
Prevention
vaccination
penicillin
Edward Jennerdiscovered vaccination.
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