Disease Causing Organisms - Virus, Bacteria and others

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What are Pathogens?

Pathogens are microorganisms or agents that cause disease in their host organisms. They can be biological entities such as bacteria, viruses, fungi, protozoa, and parasites. These microorganisms have the ability to invade the host's tissues, multiply, and disrupt normal physiological processes, leading to the development of a disease.
Different pathogens have different mechanisms of infection and modes of transmission. For example, bacteria like Escherichia coli can cause infections when ingested through contaminated food or water, viruses like Influenza can be transmitted through respiratory droplets, and parasites like Plasmodium species which are the causative agents of malaria can be transmitted through the bites of infected mosquitoes.

Names of Viruses and Diseases

# Virus Disease caused
1.Human immunodeficiency virusAIDS
2.Varicella zosterChicken Pox
3.Rubella (virus)German Measles
4.Rubeola (virus)Measles
5.Influenza type H1N1Swine Flu
6.Influenza type H5N1Avian Influenza (Bird flu)
7.Hepatitis virus type A, B, C, D or EViral Hepatitis
8.Polio virusPoliomyelitis
9.Dengue virus (DENV)Dengue
10.Rabies lyssavirusRabies

Names of Bacteria and Diseases

# Bacteria Disease caused
1.Vibrio choleraeCholera
2.Bordetella pertussisWhooping Cough
3.Cornebacterium diphtheriaeDiphtheria
4.Neisseria gonorrhoeaeGonorrhea
5.Mycobacterium lepraeLeprosy
6.Treponema pallidumSyphillis
7.Clostridium tetaniTetanus
8.Mycoplasma pneumoniaePneumonia
9.Salmonella typhiTyphoid
10.Salmonella paratyphiParatyphoid
11.Mycobacterium tuberculosisTuberculosis
12.Yersinia PestisPlague

Names of Other Organisms and Diseases

# Organism Disease caused
1.Plasmodium vivax, Plasmodium malariae, Plasmodium falciparumMalaria
2.Trypanosoma bruceiSleeping sickness
3.Trychophyton rubrumRingworm, Athlete's foot
4.LeishmaniaKala Azar



Select the right answer

1. Which disease is caused by Bordetella pertussis?

2. Which of these causes Chicken Pox?

3. Trypanosoma brucei is responsible for causing which disease?

4. Trychophyton rubrum causes which of the following diseases?

5. The virus named DENV is responsible for which disease?

6. Which of the following is the causative agent of Syphillis?

7. Which of the following is the causative agent of Plague?

8. Which of the following is the causative agent of Malaria?


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