Concept:Bacterial diseases in farm animals are caused by specific bacteria, whereas others may be caused by viruses or protozoa.
Explanation:Check the cause of each disease given in the options.
Rinderpest, swine fever, Newcastle, fowl pox and gumboro are viral diseases.
Trypanosomiasis and coccidiosis are protozoan diseases.
Fowl typhoid, mastitis, brucellosis, anthrax and tuberculosis are caused by bacteria.
Among the options, only option D lists diseases that are all bacterial in origin.
Answer:D. Brucellosis, anthrax and tuberculosis.