Fill in the blanks.

(a) Pneumonia is an example of .... disease.

(b) Many skin diseases are caused by ..........

(c) Antibiotics commonly block biochemical pathways important for the growth of ........

(d) Living organisms carrying the infecting agents from one person to another are called

(a) The right answer is Infectious communicable disease

Pneumonia is swelling (inflammation) of the tissue in one or both lungs. Pneumonia can be caused by bacteria, viruses, or fungi. Pneumonia is a communicable disease, which means it can be spread from one person to another.

(b) The right answer is Fungi

Fungal diseases are often caused by fungi that are common in the plants and trees as well as on many indoor surfaces and on human skin.

(c) The right answer is Bacteria

An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune system to neutralize pathogens such as bacteria and viruses.

(d) The right answer is Vectors

A vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another. Species of mosquito, for example, serve as vectors for the deadly disease Malaria.