Infectious Diseases - Timeline

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  • Infectious Diseases: Timeline
  • Edward Jenner and vaccination
  • Ignaz Semmelweiss and the spread of infection
  • Louis Pasteur and the germ theory of disease
  • Joseph Lister and antiseptic surgery
  • Alexander Fleming and the discovery of penicillin
  • Recent Events
  • Quiz

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Quiz - Timeline

1. Drag the scientists and their discovery to the correct date

Ignaz Semmelweiss
Developed the germ theory of disease
Edward Jenner
Introduced hand washing to prevent the spread of infection between doctors and patients
Joseph Lister
Carried out the first successful vaccination against smallpox
Louis Pasteur
Discovered penicillin
Alexander Fleming
Developed the use of antiseptics in surgery
Date Scientist Discovery

2. Penicillin is now only one of many antibiotics used to treat disease. Which of the following are reasons why so many are required?

Statement True False
Penicillin does not kill all bacteria
Penicillin does not kill viruses
Penicillin is not available in large enough quantities to use for all infections
Some bacteria are resistant to penicillin
Other antibiotics are cheaper than penicillin

3. Select the correct answer from the multi-choices. When you have answered all 4 questions you may check your answers by clicking the button below.


Why aren’t people vaccinated against smallpox today?


What is the germ theory of disease?


The first person to carry out a successful vaccination against smallpox was


The germ theory of disease was proved by

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Medicine that acts against bacterial infections. Penicillin is an example of an antibiotic.
Protein that is produced by lymphocytes (white blood cells) and that attaches to a specific antigen.
Molecule on the surface of a pathogen that identifies it as a foreign invader to the immune system.
Single-celled organism. Has a cell wall, cell membrane, cytoplasm. Its DNA is loosely-coiled in the cytoplasm and there is no distinct nucleus.
The use of biological organisms or enzymes to create, break down or transform a material
To cut apart, or separate, tissue especially for anatomical study.
Exponential growth
If something is growing exponentially the larger the quantity gets, the faster it grows
Micro-organism that can grow in long tubes called hyphae or as single cells. Fungi have a nucleus, cytoplasm and a cell wall.
Herd immunity
If a high percentage of a population is immune to a disease the disease cannot be passed on because it cannot find new hosts.
Infection caused by the human immunodeficiency virus (HIV). It attacks and destroys the immune system.
Hybridoma cells are formed by fusing a specific antibody-producing cell with a type of cancer cell that grows well in tissue culture
Immune system
The body's natural defence mechanism against infectious diseases.
A process which gives immune resistance to a particular disease. The human or animal is exposed to a harmless antigen in order to raise antibodies and provide an immune memory.
A type of white blood cell that make antibodies to fight off infections.
A type of white blood cell that consumes dead pathogens that have been killed by antibodies.
Organism that feeds off another living host and causes it some damage. An example of a parasite is a tapeworm that lives in the digestive system of a host organism.
A micro-organism that causes disease.
Phagocytes are the white blood cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.
A polymer made up of amino acids joined by peptide bonds. The amino acids present and the order in which they occur vary from one protein to another.
Protozoa are one-celled animals
A spore is a reproductive structure that is adapted for dispersal and surviving for extended periods of time in unfavourable conditions.
A poisonous or toxic substance - produced by pathogens.
A small amount of dead or weakened pathogen is introduced into the body. It prepares the immune system to prevent future infections with the live pathogen.
Medicine that contains a dead or weakened pathogen. It stimulates the immune system so that the vaccinated person has an immunity against that particular disease.
The smallest of living organisms. Viruses are made up of a ball of protein that contains a small amount of the virus DNA. They can only reproduce after they have infected a host cell.
World Health Organization.
Chlorinated Lime
A mixture of calcium hydroxide, calcium chloride and calcium hypochlorite.
Free of pathogens. An aseptic technique is one performed under sterile conditions.
A chemical which can destroy microorganisms. Antiseptics are applied to the surface of the skin or to living tissue to reduce the possibility of infection.