a substance that kills bacteria or prevents the growth of bacteria.
a chemical made by the immune system that makes it possible for the white blood cells to destroy pathogens.
microscopic, single-celled organisms.
very easy to spread - used to describe a disease.
anything that causes our body to stop working properly.
able to make the antibodies to a pathogen before it can make you unwell.
a disease that can be spread.
a stomach infection caused by the bacterium Salmonella enteritidis.
a white blood cell that makes antibodies and is found in the lymph nodes.
a white blood cell that consumes pathogens and is found in the lymph nodes.
a type of white blood cell that consumes pathogens.
an organism that causes disease.
bacteria that cause disease.
an early antibiotic.
isolation to prevent the spread of a disease.
a bacterial infection caused by Clostridium tetani.
a chemical that causes your body to react as if it had encountered a pathogen.