Page 143 - Health, Population and Environment Education 10

the disease are seen and the person becomes the source of infection. The germs from the
person’s body transmit to others by various means. As a result, many persons get infected
by the disease. Similarly, germs transmit to other healthy persons from those infected
persons. The cycle of communicable diseases is shown below.

Source or reservoir of
infection (sick person)

Medium (Modes of Susceptible host (Humans or
transmission) other organisms)

Cycle of communicable diseases

Modes and Ways of Transmission of Some Communicable Diseases
S.No. Modes of transmission Ways of transmission Diseases
1. Direct contact with the • Sleeping in the same • Eye infection
patient bed (conjunctivities)
• Sharing the food and • Scabies
spoon • Common cold
• Sitting nearby • Mumps
• Using the articles • Measles
used by the patient
• Use of utensils used • Chicken pox
by the patient
2. Through contaminated • Through breath of • Pneumonia
air the patient • Measles
• Coming in contact • Mumps
of contaminated air • Common cold
and dust particles • Bronchitis
3. Through contaminated • Drinking • Diarrhoea
food and drinks contaminated water • Dysentery
• Eating food cooked
in contaminated • Cholera
water
• Consumption of • Hepatitis B and C
fruits without • Typhoid
washing hands
properly
• Use of water in dirty
container

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