infection
Tonsillitis is commonly caused by viruses, such as the rhinovirus or adenovirus, but can also be caused by the bacterium Streptococcus pyogenes (Group A Streptococcus).
Bacteria is a type of unicellular micro organism. but a micro organism is something that is living that you cannot see with the unaided eye.
Yeast
Bacteria, fungi, algae, protozoa and virus
Streptococcal bacteria cause strep throat.
bacteria
fungus
Any animal infected with it.
fungus
Tuberculosis is caused by the bacterium called as Mycobacterium tuberculosis.
The allele causes a certain type of protein to form
Usually, they are caused by a fungus known as Gardinera.