Croup is a most commonly caused by viruses but it could be due to other causes as well, such as bateria, allergens and inhaled irritants.
croup is viral infection but bacteria ca be involved
There are both viral and bacterial forms of pneumonia.
Bacteria Virus
Bacteria and virus
No. HIV is caused by a virus, not a bacteria.
virus
It is a virus.
Pneumonia is an inflammation or infection of the lungs most commonly caused by a bacteria or virus. Pneumonia can also be caused by inhaling vomit or other foreign substances.
a bacteria. the bacteria that causes pneumonia is called pneumoniae.
AIDS is caused by a virus, not a bacteria. It is the HIV virus.
Impetigo can be caused by the staphylococcus aureus, or the streptococcus pyogenes bacteria.
A virus
Virus