Diseases caused by micro-organisms::
malaria,dengue-mosquito,- this is a disease caused by the bite of an infected mosquito(which is having plasmodium vivax parasite.)
dengue-- dengue is caused by the bite of female anopheles mosquito in tropical or sub tropical areas.
plague-rats,- this disease is caused by rats this can result in pneumonia,blood infection etc.in 14th century plague killed millions of people and that was called black death.
cholera,typhoid,-housefly--a bacterial disease causing severe dehydration and diarrhea which is spread in water.
typhoid- this is a disease which is spread through the contaminated food,water which results in stomach pain,rashes etc...
cockroaches-salmonella.--this is a disease which infects the intestinal tracts,spread through contaminated water and food.
hope this helps u..pls mrk as branliest.............