Of them bacteria are the most common disease causing agents.
They cause disease both in the plants and animals and are wide spread and with frequent disease condition among the public.
Some of them infect seasonally especially during rainy season, winters etc.
While others infect regularly due to contamination and spread from one person to another.
Few of them spread as epidemics and are a threat to human population. Plague, cholera were epidemics which wiped of few cities.
The countries population drastically declined due to plague epidemic for centuries in the past.
Bacteria infection deranges the host physiology and are life threatening.
The common symptoms like fever, weakness are observed by the host. If not treated in time, the infection can be fatal.
But the modern medicine has drugs in the form of antibiotics for effective treatment of bacterial diseases
List of diseases caused by bacteria in humans include:
5. Gastric ulcer
10. Gonorrhea. etc.
Tuberculosis: One of the most long standing and widely distributed bacterial disease in human history. It is very hard to cure this disease. It is caused by the bacteria namely myco-bacterium tuberculosis. It mostly infects lungs, bones, abdomen and also brain. If infected, the person has to be treated rigorously. In most cases a combination of anti-tubercular drugs is given for over a period of 6 months to 1 year.
Symptoms:Weight loss, chronic cough, fever, weakness, lack of appetite etc.
Causes: The bacteria is spread by sneezing droplets and air. But the microbe can be latent in humans and can produce disease when the immune system is compromised.
Typhoid: An infection caused by the bacteria salmonella typhi. It is cause mostly due to contaminated water and outside food.
Symptoms: Fever, weakness,vomiting etc.
Cholera: An epidemic infection caused by the bacteria vibrio cholera. This was a sever epidemic which caused devastating loss to human life in many parts of the world. Currently this disease is almost non-existent but still cases are reported in area with unsafe drinking water.
Symptoms: Acute diarrhea, Rice watery stools, weakness. Persons tend to die in a day or two if untreated.
Causes: Lack of safe drinking water and sanitation.
Dysentery: An intestinal infection affecting both children and adults. It is cause by bacteria like Shigella and Entero-invasive Escherichia coli.
Symptoms: Severe pain in the abdomen, loose motions, weakness and fever.
Causes: Water contamination.
Gastric Ulcer: Gastric ulcers are caused by many factors like excess acid secretion, stress etc. But there is also a bacteria namely helicobacter pyroli at the site of ulcer. Though one takes treatment for ulcer, the problem is not solved unless the bacteria is killed by antibiotics.
The interesting concept is, the stomach region is highly acidic due to secretion of hydrochloric acid. The pH can be up to 1.5 and any microbe that enters gut through food is mostly killed by acidic action. But this bacteria is so specialized that, it secretes ammonia which is basic in nature and thus neutralizes the pH in stomach around it. Hence it can stay in stomach of many years until killed by antibiotics.
Symptoms: Acidity, bloating of stomach, gas formation.
Causes: Contaminated drinking water.
Pneumonia: It is an infection of lungs caused by streptococus pneumoniae.
Symptoms: Difficult breathing, cough and fever.
Cause: Common cold and flu.
Leprosy: It is a granulomatous infection caused by mycobacteria leprae. It is spread person to person by touch in most cases.
Symptoms: Inflammation, itching Scars, loss of appendages of hands etc.
Gonorrhea: A sexually transmitted disease caused by nisseria gonorrhea. It occurs in both males and females. Causes infection in genitals, rectum, throat etc.
Symptoms: Burning sensation during urination, Yellow or white discharge, bleeding, swelling of testicles etc.
Causes: It is caused by unprotective sex with those who have this infection.
Diphtheria: Is caused by Corynebacterium diphtheriae
Symptoms: Sore throat, Fever, headache
Plague: A contagious bacterial infection caused due to bacteria Yersinia pestis.
Symptoms: Fever, headache, weakness, swelling of lymph nodes etc.
Other bacterial disease in humans include
Face– Acne or pimples are caused by Propionibacterium acnes.
Ear: Otitis is an ear infection which caused by pneumococcus, Haemophilus influenzae, and Moraxella catarrhalis.
Eyes: Conjunctivitis is an eye infection leading to soreness of eyes. Caused by Chlamydia trachomatis and Neisseria like bacteria.
Brain: Meningitis is an infection of brain meninges (covering layers). It is caused by Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae etc.
Heart: Endocarditis- an inflammation of lining of heart caused by Staphylococcus aureus, streptococci and pseudomonas species.
Urinary tract: Nephritis, prostatitis is inflammation of nephrons and prostate gland respectively.
Sex organs: Syphilis is caused by Treponema pelladium bacteria another sexually transmitted diseases.
Blood: Tetanus by streptococcus tetani.
List of diseases caused by bacteria in Plants include
Blight of paddy, citrus canker, angular leaf spot in cotton, Tumors in plants, rot in vegetables etc.
Also we might find that microbes are only harmful to us. But there are many bacteria which are helpful to us.