Major Diseases Caused by Bacteria
Disease Pathogen Affected Organs Symptoms
Anthrax Bacillus Anthracis Skin, Lung Itchiness, loss of appetite, nausea,
fever
Botulism Clostridium Botulinum Neural System Difficulty swallowing or speaking,
dry mouth
Chlamydial Chlamydia Trachomatis Cervix, Eye, pain or burning during urination.
Urethritis Urethra itching, redness, or swelling
Cholera Vibrio Cholerae Intestine Vomiting, acute diarrhoea, muscular
cramps, dehydration etc.
Diphtheria Corynebacterium Respiratory tract Difficulty in respiration (mainly in
diphtheriae 2-5 yrs of child)
Gonorrhea Neisseria Gonorrhea Urinary Tract Swelling in urinary tract
Leprosy Mycobacterium Leprae Skin, Bones, Ulcers, nodules, scaly scabs (the
Peripheral Nerves infected part of the body becomes
senseless)
Plague Pasteurella, Yersinia Blood and lung High fever, weakness and
pestis haemorrhage which trun black,
anemia, fever
Pneumonia Diplococcus Lungs Chest pain, cough, high, fever.
pneumoniae
Salmonellosis Salmonella Intestine diarrhea, fever, & abdominal cramps
Tetanus (lock Clostridium tetani Central nervous Painful contraction of neck and jaw
jaw) system muscles followed by paralysis of
thoracic muscles.
Tuberculosis Mycobacterium Lungs Repeated coughing, high fever
Tuberculosis
Typhoid Salmonella typhi Intestine High fever, diarrhoea, headache
Typhus Salmonella Typhi Blood, Skin
Whooping cough Bacillus pertussis Respiratory Continuous coughing
or pertussis system
Major Diseases Caused by Virus
Disease Pathogen Affected Organs Symptoms
AIDS Acquired HIV Human T-lymphocytes, Weak immune system
Immune Deficiency Immunodeficiency White blood cells
Syndrome Virus
Chicken pox Vericella virus Whole body High fever, reddish eruption
(Varicella) on body.
Dengue Fever dengue virus Blood, Muscles, head, eye High fever, backache,
and joints headache, retro-orbital pain
behind the eye ball.
Ebola Ebola Virus (filovirus) Whole body Fatal hemorrhagic fever,
liver and kidney dis-function
vomiting, headache.
Hepatitis A (Not Hepatitis-A & B virus Liver Loss of appetite, nausea,
fatal) whitish stool and jaundice
and B (fatal)
Herpes Simplex herpes simplex virus Skin, Pharynx, multiple blisters on or
Genital organs around affected areas
Influenza (flu) Influenza virus Respiratory Tract Inflammation of upper
respiratory tract, nose throat
and eyes.
Measles (Rubeola) Rubella virus Whole body Loss of appetite, reddish
eruption on the body.
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