(i) Virus (a) E.coli (ii) protozoan (b) hepatitis

Solution

1. Hipatitis A is a highly contagious liver infection caused by the virus. 2. Plasmodium is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. The life cycles of Plasmodium species involve development in a blood-feeding insect host which then injects parasites into a vertebrate host during a blood meal. 3. Escherichia coli, also known as E. coli, is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms. 4. Ringworm is a highly contagious fungal infection of the skin or scalp. And spread by skin-to-skin contact or by touching an infected animal or object.