Human Diseases

Did you know that there are over 7,000 known human diseases? In this blog post, we will discuss the biology of human diseases, their causes, and the treatments available. We will also explore viral diseases in humans and skin diseases caused by fungus. Early signs of liver disease in humans will also be discussed. Keep reading to learn more!

What Is A Human Disease?

Human diseases are illnesses and health problems that affect the body and mind of humans. When someone is sick with a viral infection, such as flu or chickenpox, it means they have contracted an illness caused by viral pathogens which are called viral diseases.

Classification Of Human Diseases based on Causes

Human diseases are classified into many different categories. The most common classification is by the cause of the disease. There are five main types of causes: viral, bacterial, fungal, parasitic and environmental.

Viral diseases in humans:

• Viral diseases are caused by viral infections, which can be spread from one organism to another. Viruses cause diseases in many animals and plants. The best known human viral disease is the common cold. Other viral diseases in humans include chickenpox, shingles, influenza (flu), hepatitis B, HIV/AIDS and Ebola fever.
• Viral diseases can be treated with antiviral drugs. Vaccines can be used to prevent viral diseases

Bacterial diseases in humans:

• Bacteria are single-celled organisms that can cause disease. Bacteria are microscopic, so they cannot be seen without a microscope. They only multiply and grow in places with the right conditions, such as in the human body, where they can cause disease.
• There are many different types of bacteria, and some can cause serious diseases. The best known bacterial diseases are tuberculosis (TB), typhoid fever, cholera and meningitis. Bacterial diseases can be treated with antibiotics.

Parasitic diseases in humans:

Parasites are organisms that live on or inside another organism and survive by feeding off it. Parasites can cause disease in humans. The best known parasitic diseases in humans are malaria, sleeping sickness, schistosomiasis and elephantiasis. Parasitic diseases can be treated with drugs that kill the parasites.

Environmental diseases in humans:

Some diseases are caused by contact with environmental factors, such as bacteria, viruses, parasites or toxins. The best known environmental diseases are Legionnaires’ disease, Lyme disease and leptospirosis. Environmental diseases can be treated with antibiotics, antiviral drugs or other drugs.

Fungal diseases in humans:

Fungi are a type of organism that includes moulds, yeasts and mushrooms. Some fungi can cause diseases in humans. The best known fungal disease is ringworm. Other fungal diseases include athlete’s foot and thrush. Fungal diseases can be treated with antifungal drugs.

Classification Of Human Diseases Based On Body Parts

Another way to classify human diseases is by the part of the body that is affected. There are three main groups: respiratory diseases, skin diseases and systemic diseases. Respiratory diseases affect the lungs and airways. They include such common disorders as asthma, pneumonia and bronchitis. 

Skin diseases are those that affect the skin. They are the most common type of disease and include conditions such as eczema, psoriasis and acne. Systemic diseases are those that affect the whole body. Some of the most common include liver disease, diabetes and cancer.

Respiratory diseases are disorders affecting the lungs and airways. They are very common, particularly viral diseases such as the common cold and influenza (flu). These can be early signs of liver disease in humans.

Types of Diseases

There are mainly two types of diseases: infectious diseases and non-infectious diseases. 

Infectious diseases are caused by microorganisms such as viruses, bacteria, or fungi. Noninfectious diseases are caused by environmental factors such as pollution or certain lifestyles. However, some viral and bacterial infections can be prevented through vaccination.

Viral and Bacterial Infectious Diseases:

Infectious Diseases

Viruses, bacteria and fungi spread from person to person through fluids or direct contact with another infected individual. They can also be transmitted through food or water. Infectious diseases can be either viral, bacterial, or fungal. Eg- COVID, Influenza. 

Viral Diseases

Many different viral infections can affect the human body, but common viral diseases include the flu, HIV/AIDS and herpes. The flu is caused by a virus that infects the nose and throat. It is a highly contagious disease that can be spread through coughing and sneezing. HIV/AIDS is a viral disease that affects the immune system by destroying white blood cells. Once HIV/AIDS enters the human bloodstream, it is spread through bodily fluids such as blood, semen and breast milk. Herpes is a viral infection that can cause blisters on the skin or in the mouth. It is spread through direct contact with an infected person.

Bacterial Diseases

Common viral diseases include strep throat, tuberculosis and syphilis. Streptococcus pyogenes, more commonly known as strep throat, is a bacterial infection that causes a sore throat and fever. Tuberculosis is caused by the bacterium Mycobacterium tuberculosis that attacks the lungs. Syphilis is a sexually transmitted bacterial disease that causes sores on the genitals.

Fungal Diseases

There are many different types of fungus, but only a few can cause diseases in humans. This type of disease is a skin disease in humans caused by fungus including ringworm, athlete’s foot and yeast infections. Ringworm is caused by a type of fungus that affects the skin. It is a highly contagious disease that can be spread through contact with an infected person or animal. An athlete’s foot is caused by a fungus that affects the feet. It is a common infection that can be spread through contact with an infected person or object. Yeast infections are caused by a fungal infection in the body. Yeast infections are more common in women than men and can be spread through sexual intercourse with an infected person.

Conclusion 

In conclusion, human diseases are caused by a variety of things and can be treated in several ways. Students need to learn about the biology of diseases, their causes, and the treatments available to protect themselves and others. We hope this article has been informative and helpful. If you have any questions or would like more information, please contact us.