Understanding Animal Research

Guinea pigs in medical research

Laboratory guinea pigsWhy are guinea pigs used in medical research? They have many biological similarities to humans, beyond the simple fact that they are mammals, which make them useful in many fields of research. Guinea pigs have been used as experimental animals for centuries; hence 'guinea pig' for a human experimental subject.


Studies on guinea pigs led to the discovery of:

  • Vitamin C
  • the tuberculosis bacterium
  • adrenaline

Guinea pigs were used in development of:

  • vaccines for diphtheria and TB
  • replacement heart valves
  • blood transfusion
  • kidney dialysis
  • antibiotics
  • anticoagulants
  • asthma medicines

Early history

Vitamin C was discovered using guinea pigs in 1907, and because, like humans, it requires this vitamin in its diet, the guinea pig has been used ever since in its study. Most other animals synthesise their own vitamin C. Following this early use, many other areas of nutrition have been studied in the guinea pig.

The German scientist Robert Koch used guinea pigs to discover that TB was caused by the bacterium Mycobacterium tuberculosis, in 1882. The sensitivity of the guinea pig to this and other infections, and the similarities of its immune defence system to that of humans, has made it important in the study of infectious diseases.

Guinea pig tissue

The guinea pig is also widely used to provide tissues and organs for research. Guinea pig blood components are widely used, and isolated organ preparations such as guinea pig lung and intestine are extensively used in research to develop new medicines. Such tissue and organ preparations were important in the discovery and early development of beta blockers to treat high blood pressure and drugs to treat stomach ulcers.

Main uses of guinea pigs in research today


There are four main areas:

  • Allergies and respiratory diseases
  • Nutritional research
  • Hearing
  • Safety testing

Watch our video Guinea pigs in medical research

See also the page on guinea pigs at AnimalResearch.info

Last edited: 19 November 2012 15:47