What is infection?
Infections are diseases that can occur in every part of our body, caused by bacteria,
viruses or parasites and some of them can be contagious. All infections are caused
by pathogens. Additionally, infections cause disease.
Isabela’s lesson
What is a disease?
A disease is simply a form of malfunction or even disorder of either the body or mind
which leads to or can lead to a decline of good health. They actively attack the
body’s cells. There are different categories of diseases that are known. These
categories include:
1. Infectious diseases caused by foreign organisms such as pathogens which
invade the body.
Category Cause of the Examples The duration Location Modes of
disease transmission
Protozoa Protozoan Malaria – a blood For an acute The parasites Person to
infections are disease, which is disease, continue to person.
parasitic caused by pathologic infect red Animal to
diseases ‘plasmodium changes occur blood cells, person.
caused by parasites’. over a relatively resulting in Mother to
organisms short time and symptoms unborn child.
formerly Measles - an involve a rapid that occur in Indirect
classified in the infectious onset of disease cycles that contact.
Kingdom viral disease conditions. last two to Insect bites.
Protozoa. They causing fever and three days at Food
include a red rash, https://courses.lum a time. contaminatio
organisms typically occurring enlearning.com/mic n.
classified in in childhood. robiology/chapter/c https://www.o
Amoebozoa, E Wikipedia haracteristics-of- micsonline.org
xcavata, and infectious-disease/ https://www.h /conferences-
Chromalveolata ealthline.com/ list/modes-of-
https://en.m.wik health/malaria transmission-
ipedia.org/wiki/ of-infectious-
Protozoan_infe diseases
ction
Bacterial A localised Cholera – caused Bacterial infections One location Causing or
infection, which by consuming last 5 to 7 days is the small sneezing.
stays in contaminated food depending on the intestine. Contact with
one place howe or water. patient. infected
ver, reproduces people.
and produces Kissing.
toxins. These Sex.
toxins can https://www.b
harm your ritannica.com
tissues. Also /science/chol
caused by era
microbes.
Viral It’s made up of Hepatitis -caused The effects will This viral Person to
genetic by consuming last as long as the infection person.
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