CORRECT answer is Protozoa.Protozoa are a group of unicellular EUKARYOTIC organisms.Diseases like DYSENTERY and MALARIA are caused by protozoa.The protozoa CAUSING malaria is Plasmodium.The mosquito spreading malaria is anopheles mosquito.Disease caused by protozoa are - African trypanosomiasis.Amoebiasis.Malaria.Chagas disease.Leishmaniasis.Important diseasesPathogenDiseaseVirusSmallpox.Chickenpox.SARS.Polio.Rabies.Dengue fever.Measles.Common cold.BacteriaCholera.Pertussis.Leprosy.Plague.Tuberculosis.Tetanus.Syphilis.Typhoid.Anthrax.FungusAthlete's foot.Aspergillosis.Ringworm.