1. can be treated with antibiotics - bacteria
2. genetic material enclosed in protein casing - virus
3. unicellular organisms in Protista kingdom - protozoa
4. infection spread by spores - fungi
Explanation:
Protozoans are free-living or parasitic unicellular colony forming protists. Parasitic protozoans are pathogenic and cause many parasitic diseases like malaria, leishmaniasis, sleepiness disease, giardiasis etc.
Fungi spread infection by their spores. The microscopic spores are produced for reproduction which settles in the air or surface or soil. Anyone can be infected when these spores are inhaled or contacted by body. Spores from mold and other fungi can spread infections like tinea diseases, onychomycosis, candidiasis, bronchopulmonary aspergillosis, and many respiratory illnesses like allergy, asthma etc.
The genetic material of a virus is enclosed in a protein casing or shell called capsid. This protein (protomers) covering protects the viral genetic material degraded by the host cells or other antiviral agents. Many diseases are caused by virus starting from the common flu and severe ones like HIV.
Diseases caused by a pathogenic strain of bacteria can be cured by treating with antibiotics. Bacterial diseases include pneumonia, H. pylori, meningitis, gonorrhea, etc. antibiotics are antibacterial drug that fights against bacteria either by killing them or by inhibiting their growth. Common antibiotic types include the pencillins, cephalosporins, macrolides, fluroquinolones, etc.