List Of Human Diseases For Competitive Exams

In this section you will get to know about various human diseases and their causes. This section containing information about human diseases and their causes is going to be very useful if you are preparing for competitive exams like JKSSB, JKPSC, UPSC and SSC.

Also Read: MCQs on vitamins

Diseases Caused By Bacteria in Humans

The diseases caused by bacteria in humans are listed below:

DiseaseCausative BacteriaMode of transmissionAffected Organ
Septic sore throat StreptococcusDroplets and Direct ContactThroat and Nasal Membrane
Diphtheria Corynebacterium diphtheriaContact, droplets and food items. Respiratory tract
Pneumonia Diplococcus pneumoniaDroplets Respiratory tract
Tuberculosis Mycobacterium tuberculosisDirect contact, droplet infection, food and milk.lungs, bones and other organs
Plague Yersinia pestisFrom rat to man through Rat FleaLymph nodes and Lungs
Tetanus or LockJaw Clostridium tetaniEnters through woundjaw and neck muscles
Typhoid or enteric fever Salmonella typhi Flies, food, faeces water and carriersEntire body
Cholera Vibrio cholerae Flies food, stools, water and carriersSmall intestine
Bacillary dysentery Shigella dysenteriae Flies, food, faeces,water and carriersIntestines
Whooping cough Hemophilus pertussis)Droplets Respiractory Tract
Syphilis Treponema pallidam direct contact, chiefly sexual intercourseBrain, nerves, eyes, heart, blood vessels, liver, bones, and joints.
Leprosy Mycobacterium Leprae long and close contact with infected personsSkin, nerves of hands, feet and eyes, and the lining of the nose
BotulismClostridium BotulinumBadly processed foodStomach and Intestines

Human diseases caused by Viruses

The list of the diseases caused by viruses in humans is given below:

DiseaseCausative VirusMode of transmissionorgans affected
SmallpoxVariola VirusDirect contact, droplets or touching contaminated surfacesskin, intestines, lungs, kidneys, and brain
Chicken PoxVaricella VirusDirect contact, droplets or touching contaminated surfacesTrunk, face, limbs, mouth and throat
Common ColdRhinovirusDroplets or touching contaminated surfacesnose, throat, sinuses and trachea
Influenze/FluOrthomixo virusdirect contact, virus in Saliva and secretion of nose invades salivary glands.nose, throat, sinuses and trachea
MumpsMumps Virusparotid glands
Viral EncephalitisEncephalitis Virus domestic animals are reservoirs
of virus, transmitted by mosquito bite to man.
houseflies, fleas, food and water.
spinal cord 
RabiesRabies virus (rhabdovirus)Through bite of a rabid dognervous system (brain and spinal cord)
Dengue / Break Bone feverDengue virusThrough Mosquito (Aedes)
AIDSHIVanal or vaginal sex, or sharing needles, syringes, or other drug injection equipment Immune System

Human diseases caused by Protozoans

The human diseases caused by protozoans are listed below:

DiseaseCausative ProtozoaMode of transmissionOrgans affected
Amoebic dysentery / (Amoebiasis)Entamoeba histolyticaingestion of cysts in
drinking water vegetables and food
contaminated with faeces.
Diarrhea ‘Giardiasis’Giardia intestinalisingestion of cysts in
drinking water vegetables and food
contaminated with faeces.
large intestine (colon)
MalariaPlasmodium vivaxTransmitted to man by bite of an infected female anopheles mosquito.Kidneys, liver, spleen, lungs
Sleeping sickness (Trypanosomiasis)Trypanosoma bruceiTransmitted by bite of
tsetse fly
brain (Swelling)

Human diseases caused by Fungi

The human diseases caused by fungi are listed below:

DiseaseCausative FungiMode of transmissionOrgans affected
RingwormMicrosporum, Trichophytondirect contact from unbathed cats and dogs or objects handled by infected individuals.Skin
Athlete’s footTrichophytonBad foot hygiene where skin remains warm and moist for long period, fungi finds optimal
condition, invade dead outer layer of skin.
Black Fungus / Mucormycosismucormycetes.via exposed wounds in the skin, inhaling, and breathingsinuses, lungs, skin, and brain.

This was the lost of diseases that occur in humans. we are sure that this list of diseases will help you a lot in your competitive exams.

Also check: MCQs on vitamins

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