list in five ways which protozoan are harmful to us
Answers
❤ANSWER❤
The 5 harmful diseases caused by protozoans in humans are:
1. Amoebiasis - is caused by Entamoeba histolytica and can lead to ulcers in the colon.
2. Diarrhoea - is caused by Giardia lamblia and leads to loose bowels.
3. Trypanosomiasis - is caused by the Trypanosoma species which are flagellate parasites of blood plasma and leads to sleeping sickness.
4. Leishmaniasis - is caused by the species of Leishmania and leads to skin sores and spleen enlargement.
5. Malaria - is caused by four different species of Plasmodium and leads to malaria.
Explanation:
Answer:
A pathogen is a micro-organism that has the potential to cause disease.
An infection is the invasion and multiplication of pathogenic microbes in an individual or population.
Disease is when the infection causes damage to the individual’s vital functions or systems.
An infection does not always result in disease!
To cause an infection, microbes must enter our bodies. The site at which they enter is known as the portal of entry.
Microbes can enter the body through the four sites listed below:
Respiratory tract (mouth and nose) e.g. influenza virus which causes the flu.
Gastrointestinal tract (mouth oral cavity) e.g. Vibrio cholerae which causes cholera.
Urogenital tract e.g. Escherichia coli which causes cystitis.
Breaks in the skin surface e.g. Clostridium tetani which causes tetanus.
To make us ill microbes have to:
1.reach their target site in the body;
2.attach to the target site they are trying to infect so that they are not dislodged;
3.multiply rapidly;
4.obtain their nutrients from the host;
5.avoid and survive attack by the host’s immune system.
pls mark as brainliest
Explanation: