List of 16 Diseases Caused by Bacteria in Humans

Bacteria are unicellular microorganisms, known as one of the earliest living beings on the earth. They can exist in any possible place in the environment, even inside your body.

Most bacteria that dwell in your body are usually harmless and beneficial. However, some (less than 1%) can invade your body from the outer environment and make you ill, leading to diseases caused by bacteria.

If you want to learn about such diseases and their symptoms, prevention and treatment, keep reading.

Team Digit

What are Bacterial Diseases?
Causes of Bacterial Diseases
List of Diseases
Signs and Symptoms
Damages Caused
Associated Risk Factors
Diagnostic Tests
Treatment Methods
Preventive Measures
Does Health Insurance Cover?
Frequently Asked Questions

What Are Bacterial Diseases?

Bacterial diseases are illnesses caused by harmful bacteria, which are single-celled microorganisms. These diseases can affect various body parts and are often spread through direct contact with contaminated food, water, or air.

Symptoms and severity vary widely, ranging from mild infections to severe, life-threatening conditions. Bacterial diseases are typically treated with antibiotics, though resistance to these medications is a growing concern.

What are the Causes of Bacterial Diseases?

Bacterial diseases primarily arise due to pathogenic bacteria that invade the body and interfere with normal functioning. These microorganisms find their way into the body via different routes, including food or water that is contaminated, direct contact with infected persons, and vectors such as insects.

Poor sanitary practices, substandard hygiene, and compromised immune systems can also heighten the risk of acquiring bacterial infections. It is essential to understand these causes to prevent and effectively manage bacterial diseases.

16 Common Diseases Caused by Bacteria

Bacterial infections are caused by different strains of bacteria that can lead to various health issues. Below is a list of diseases caused by bacteria:

Whooping Cough

It is a contagious infection in the respiratory system that causes severe cough and difficulty breathing. It is caused by Bordetella pertussis. Immediate medical treatment is essential to manage symptoms and prevent severe complications. Vaccination is also crucial in preventing outbreaks, particularly in vulnerable populations.

Bubonic Plague

This contagious disease causes swollen lymph nodes in the neck, groyne, and armpit. Yersinia pestis causes this serious infection and requires prompt medical intervention to avoid life-threatening outcomes. It can also spread through flea bites or contact with infected animals, making early detection and treatment critical.

Cholera

It falls under the examples of bacterial diseases that affect the intestine and cause diarrhoeal sickness. Vibrio cholerae causes it. Proper hydration and medical care are crucial to treat this disease and prevent dehydration. Improved sanitation and access to clean water are key preventive measures.

Diphtheria

This infectious disease affects the mucous membranes of your throat and nose. Caused by Corynebacterium diphtheriae, it requires timely antibiotic treatment to avoid severe respiratory complications. Vaccination is highly effective in preventing diphtheria and controlling its spread through the body.

Pseudomonas Infection

This infection affects your lungs, blood, stomach, tendons, and urinary tract. It also can spread over a wound or burn. Effective treatment is critical to manage this versatile infection caused by Pseudomonas aeruginosa. It is often resistant to multiple antibiotics, making treatment challenging.

Leprosy

It happens due to slow bacterial growth and affects the eyes, skin, nasal cavity, and peripheral nerve. Caused by Mycobacterium leprae, it requires long-term antibiotic therapy to prevent disability and spread. Early diagnosis is essential to minimise the risk of complications and long-term effects.

Tetanus

It is an infection that causes painful stiffness and muscle shrinkage, mainly in the neck and jaw. It is caused by Clostridium tetani. Immediate medical treatment with antitoxin and antibiotics is necessary to manage this serious infection. Proper wound care and vaccination are important preventive measures.

Gonorrhoea

It is one of the diseases caused by bacteria that causes infertility. Caused by Neisseria gonorrhoeae, prompt treatment with antibiotics is required to prevent long-term complications. It can lead to serious health issues, including pelvic inflammatory disease and chronic pain. Safe sex practices are crucial for prevention.

Syphilis

This is a sexually transmitted disease that can initially cause soreness in your mouth, rectum, and genital. However, the final stage can affect your heart, eyes, brain, and nerve. Caused by Treponema pallidum, early diagnosis and treatment are essential. Regular screening and practising safe sex can reduce the risk of syphilis.

Salmonellosis

This infection affects the intestine and causes diarrhoea, abdominal pain, and fever. Caused by Salmonella enteritis, it requires proper medical treatment and hydration to manage symptoms. If left untreated, it can lead to severe dehydration and more serious complications. Safe food handling and hygiene are key to prevention.

Urinary Tract Infection

It affects any part of your lower urinary tract, including the uterus, bladder, and kidneys. Caused by coliform bacteria, antibiotic treatment is required to resolve symptoms and prevent complications. Safe food handling and hygiene are key to prevention. Proper hydration and personal hygiene can help prevent recurrent infections.

Respiratory Tuberculosis

It is one of the bacterial diseases that primarily affects your lungs, causing cough, bleeding, and chest pain. It is caused by Mycobacterium tuberculosis and requires a long course of antibiotics for effective treatment. Public health measures and vaccination are critical in controlling its spread.

Botulism

It is an infection that affects the muscles of your eyes, mouth, face, neck, throat, arms, and legs. Caused by Clostridium botulinum, it requires immediate medical attention to manage symptoms and prevent severe complications. Early treatment with antitoxins and supportive care is crucial for recovery.

Bacterial Pneumonia

It is an infection that affects your lungs directly and causes severe cough and sneeze. It is caused by Streptococcus pneumoniae and requires antibiotics for effective treatment. Without timely intervention, it can lead to serious complications such as pneumonia or respiratory failure. Vaccination and prompt medical care are important for prevention and management.

E. coli Infection

Caused by various strains of Escherichia coli, it can lead to gastrointestinal symptoms such as diarrhoea, abdominal cramps, and nausea. Some strains can cause severe complications like hemolytic uremic syndrome (HUS). Proper food handling and hygiene are essential to prevent E. coli infections.

Chlamydia

A common sexually transmitted infection caused by Chlamydia trachomatis leads to symptoms like discharge, pain during urination, and, in women, pelvic pain. If untreated, it can cause serious reproductive issues. Regular screenings and safe sex practices are important for prevention and early detection.

What Are the Signs and Symptoms of Bacterial Diseases?

What Are the Symptoms of Bacterial Diseases?

All the infections mentioned above have significant symptoms. However, some general signs of diseases caused by bacteria are as follows:

Coughing
Diarrhoea
Fever, cold and sore throat
Fatigue
Headache
Pain in urination
Muscle pain and soreness
Irritation and rashes

Damages Caused by Bacteria in Humans

Understanding the impacts of bacterial infections is crucial for effective management and prevention. Illustrated below are the various damages caused by bacterial infections:

Bacteria can invade and destroy host cells, leading to tissue damage and inflammation. This can result in cell death and chronic diseases.
Some bacteria produce toxins that weaken the immune system, increasing susceptibility to other infections.
Certain bacteria can cause long-term infections, leading to persistent damage to organs and tissues, such as tuberculosis.
Bacterial infections can lead to sepsis, a severe condition causing widespread inflammation, organ failure, and potential death.
Bacteria like Clostridium botulinum produce toxins that can cause paralysis, while Corynebacterium diphtheriae can damage the throat and heart.
Bacteria can spread throughout the body, causing systemic infections like bacteremia, which can lead to widespread inflammation and organ failure.
Infections can trigger excessive inflammation, leading to tissue damage and contributing to chronic conditions like arthritis or inflammatory bowel disease.

Who Is At Risk of Getting Affected by Bacteria?

The following conditions increase the risk of bacterial diseases in humans -

Anyone under medication that subdues the immune system.
If a person is suffering from any illness or recently had any surgery.
Infants and older people who lack immunity or nourishment.
If anyone comes in direct contact with an infected person.
Anyone who is suffering from an immunodeficiency disorder.
A person who is genetically prone to bacterial infections.
If an infected animal scratches or bites you.

How to Diagnose Bacterial Diseases?

Usually, a doctor can name the disease caused by bacteria by analysing your symptoms thoroughly. However, sometimes your doctor may need confirmation through some tests. Below are some tests that your doctor may prescribe you.

Diagnostic Test	Description
Blood Tests	Used to analyse blood samples for signs of infection, inflammation, or immune response.
Tests of Fluid and Mucus Samples	Involves analysing fluid or mucus samples from affected areas (e.g., throat swabs, sputum) to identify bacterial presence.
Urine or Stool Test	Involves examining urine or stool samples to detect bacteria or their byproducts, indicating infections in the urinary or gastrointestinal tract.
Imaging Studies	It includes X-rays, endoscopy, ultrasound (USG), etc., which are used to visualise internal structures and identify abnormalities or infections.
Antibody Blood Tests	Detects antibodies in the blood, indicating past exposure to a pathogen or an immune response.
PCR Test	Polymerase Chain Reaction test identifies the genetic material of bacteria, offering high accuracy in detecting infections.
Stains of Tissue	Special stains are applied to tissue samples to highlight specific bacteria, cells, or structures, aiding in disease diagnosis.

Other than this, your doctor may opt for an imaging study such as an X-ray, endoscopy, USG, etc.

What Are the Treatment Methods for Diseases Caused by Bacteria?

Although often bacterial infections get cured on their own, you may need treatment once they become severe. Following are some generic cures to diseases caused by bacteria:

1. Antibiotics

Your doctor will prescribe you antibiotics according to the type of bacterial infection. Most antibiotics can fight several types of bacteria, but not all. You can take antibiotics through your mouth, the surface of your eyes and skin or your veins (intravenous therapy).

2. Supportive Medication

You may need some anti-inflammatory or pain killer medication. These drugs help you relax your pain and prevent the infection from spreading. In addition, your doctor may add medicine to control your fever and painful cough during the treatment.

3. Surgery

You may need a surgical procedure if you have a blister. The process can be simple in case of an abscess on your skin. However, the surgery can be complicated if the bump is deep-rooted in your body.

What Are the Preventive Measures to Control Diseases Caused by Bacteria?

Microbes are not easy to prevent completely from affecting animals or human beings. Nevertheless, following preventive measures can mitigate the risk of bacterial infections.

Maintaining proper hygiene and washing hands frequently reduces the risk of bacterial infection.
Keep your face and mouth covered to prevent the spread of bacterial diseases that are communicable.
You must not share your foods, drinks, hair comb, toothbrush, razor, needles, food container etc.
Getting your vaccine on time helps mitigate the risk factor of infections due to bacteria.
Stay away from public places or gatherings when you are ill.
Having protected carnal intercourse is crucial to prevent spreading bacterial infection.
You can prevent bacterial infections by eating freshly made and hygienic food.

Does Health Insurance Cover Bacterial Diseases?

Yes, health insurance typically covers bacterial diseases, including the costs for doctor visits, diagnostic tests, and necessary medications. Most comprehensive health insurance plans, especially those under the Affordable Care Act (ACA), provide coverage for essential health benefits, which generally include treatments for bacterial infections.

However, the extent of coverage and out-of-pocket costs can vary depending on your specific plan. Some plans, like short-term or limited-duration health plans, may have more restrictions and may not cover all treatments for bacterial diseases. It's important to review your insurance policy or speak with your provider to understand what is covered and any potential costs you may incur.

Bacterial diseases present a significant health challenge, affecting various parts of the body and leading to a range of symptoms from mild to severe. Understanding the causes, symptoms, and treatment options for bacterial infections is crucial for effective management and prevention. Timely medical intervention, proper hygiene practices, and adherence to prescribed treatments can significantly reduce the risk of complications and improve overall health outcomes.

FAQs about Diseases Caused by Bacteria

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Which place in the human body has most of the bacteria?

Most of the bacteria (almost a billion) in the body live in the human gut.

Is Diphtheria a bacterial disease?

Yes, Diphtheria is a bacterial disease caused by a type of bacteria named Corynebacterium diphtheria.

What are bacterial diseases?

Bacterial diseases are infections caused by bacteria, which are single-celled microorganisms. They can affect various parts of the body and cause a wide range of symptoms.

How do bacterial diseases spread?

Bacterial diseases can spread through direct contact with infected individuals, contaminated food or water, airborne droplets, or contact with contaminated surfaces.

What are the common symptoms of bacterial infections?

Symptoms vary depending on the type of infection but can include fever, chills, fatigue, pain, swelling, and redness. Specific symptoms depend on the part of the infected body.

How are bacterial diseases diagnosed?

Diagnosis typically involves a combination of physical examination, medical history, and laboratory tests such as blood tests, urine or stool tests, tissue samples, and imaging studies.

How can bacterial diseases be prevented?

Prevention methods include practising good hygiene, such as regular handwashing, maintaining proper food safety, getting vaccinated, and avoiding close contact with infected individuals.

Are bacterial infections contagious?

Yes, many bacterial infections are contagious and can spread from person to person through various means, such as respiratory droplets, skin contact, or contaminated surfaces.

What are the risks of untreated bacterial infections?

Untreated bacterial infections can lead to severe complications, including chronic health problems, organ damage, or even death. Prompt treatment is crucial to avoid these risks.

How can you tell if a bacterial infection is severe?

Signs of a severe bacterial infection include high fever, severe pain, difficulty breathing, confusion, persistent vomiting, or rapid worsening of symptoms. Immediate medical attention is needed in these cases.

Are all bacterial infections treatable with antibiotics?

Most bacterial infections are treatable with antibiotics, but some bacteria resist certain antibiotics, making treatment more challenging. Proper diagnosis and antibiotic sensitivity testing are important.

Can bacterial diseases be transmitted through animals?

Yes, some bacterial diseases can be transmitted from animals to humans, known as zoonotic infections. Examples include Lyme disease from ticks and brucellosis from livestock.

What should you do if you suspect a bacterial infection?

If you suspect a bacterial infection, seeking medical advice for proper diagnosis and treatment is important. Do not self-medicate or delay seeking professional help.