Microorganisms are also known as microbes that are not visible through naked eyes. Several types of microorganisms are harmless and beneficial to your body. However, other microbes can cause microbial infection or pathogens, leading to diseases.

Some diseases caused by microorganisms do not need any treatment and heal independently. But some microorganisms cause illnesses that can affect you for a long go. Read further to learn about microbes and the diseases they cause.

Microorganisms are microscopic living agents found in every conceivable environment on the earth. They include bacteria, viruses or fungus and live in a unicellular form or as a colony of cells.

Tiny living organisms, known as microbes, are ubiquitous. These tiny entities, also called microbes, are invisible to the human eye. They are found in the air, on land, and in water. Additionally, millions of these microorganisms reside in the human body.

These are diseases caused by different microorganisms: bacteria, viruses, fungi, and parasites. Bacterial diseases, such as tuberculosis and strep throat, are caused by pathogenic bacteria. Virus invasion into host cells can cause viral diseases like influenza or COVID-19. 

Fungal diseases, like candidiasis and athlete's foot, are caused by fungi infection. Parasitic diseases, such as malaria and giardiasis, are caused by parasites outside or inside hosts. Each type of microorganism causes unique health problems, with different mechanisms of infection and disease processes.

Microorganism diseases are spread by different microorganisms, which lead to different infections. These microorganisms might differ in their modes of infection and pathogenesis for causing the disease; however, all can interfere with normal functioning in an individual's body, causing illnesses. 

The major ones include:

• Bacteria: Single-celled organisms can cause tuberculosis, strep throat, and bacterial pneumonia.
• Viruses: Submicroscopic parasites that replicate within the host cells lead to diseases such as influenza, HIV/AIDS, and COVID-19.
• Fungi: Basic include yeasts and molds, which can lead to athlete's foot, ringworm, and candidiasis.
• Parasites: Organisms that live inside other organisms and cause illness, such as protozoa, helminths, also called worms, and ectoparasites, like lice and ticks.

Several sources in the environment can transmit microbial infections. Therefore, it is vital to learn about the diseases and their transmission mode to take appropriate measures. Below are some lists of diseases caused by microorganisms and their transmission mode.

Despite their importance in ecological and biological processes, microorganisms are dangerous to human health, agriculture, and the environment. Microorganisms like bacteria, viruses, fungi, and protozoa cause many human diseases, from the common cold to tuberculosis and HIV/AIDS. This indicates that there are harmful microorganisms in agriculture that can lead to plant diseases, too.

Fungi can cause blights, rusts, or smuts on crops, while bacteria or viruses can result in livestock diseases. Some microorganisms contribute to soil degradation or pollution by releasing harmful substances, among other things. Coming in contact with such microorganisms is harmful to humans. 

Microorganisms like bacteria, viruses, fungi, and protozoa are responsible for numerous diseases, each with different symptoms. Here are some common examples:

Bacterial Infections

• Tuberculosis (TB): A cough lasting more than three weeks without stopping and bringing up blood or chest pain are the main symptoms of tuberculosis. TB can infect other body parts, but it mostly affects the lungs.
• Streptococcal Pharyngitis (Strep Throat): Symptoms include a sudden severe sore throat, swallowing pain, fever, swollen lymph nodes in the neck, and red swollen tonsils, often with patches or streaks of white pus.
• Bacterial Pneumonia: Symptoms include a productive cough (with green or yellow mucus), high fever, chills, chest pain worsening with deep breathing or coughing, and shortness of breath.

Viral Infections

• Influenza (Flu): Symptoms can include a high fever, chills, muscle pains, body aches, muscle pains, joint pains, fatigue, tiredness, sore throat, sore muscles, tired muscles, and dry cough. In severe cases, the flu may become pneumonia.
• Common Cold: This disease is commonly caused by viruses, particularly rhinoviruses. It is characterised by sneezing, runny nose, stuffy nose, mild fever, and coughs. The common cold is less severe than the flu and usually has no associated complications.
• HIV/AIDS: At first, when HIV infects people, they will experience flu-like symptoms such as fever, sore throat, swollen lymph nodes, and weakened immune system. As its stages advance to AIDS (Acquired Immunodeficiency Syndrome).

Fungal Infections

• Athlete’s Foot (Tinea Pedis): In between the toes, you may experience itching, burning, and cracked red skin. Additionally, there might be blisters and peeling of the skin.
• Candida (Yeast Infection): Symptoms include itching, burning, and a thick, white discharge in vaginal infections; oral thrush may cause white patches on the tongue and inside the mouth.
• Ringworm (Tinea Corporis): It is a fungal infection that produces a rash with a ring-like appearance that is red and scaly ring-like appearance. It can occur anywhere on the body and often feels itchy.

Protozoan Infections

• Malaria: Anopheles mosquitoes transmit this disease caused by protozoa from Plasmodium species. Signs include high temperature, which could cycle with sweating and chills, accompanied by muscle pains and fatigue. If severe malaria goes untreated, complications like organ failure or anaemia can result in death.
• Amoebic Dysentery (Amoebiasis): This amoeba causes amoebic dysentery. Among other symptoms are severe diarrhoea (sometimes bloody), stomach pain, cramping, and nausea, which are also known to cause liver abscesses in extreme cases.

Bacterial Infections

• Antibiotics: This is used specifically against bacterial cells. Examples include penicillin, tetracycline, and ciprofloxacin.
• Vaccines: Preventive measures taken to help protect against certain bacterial infections, such as vaccines against tuberculosis or whooping cough.

Viral Infections

• Antiviral: medications stop the replication of viruses. Examples are oseltamivir, which suppresses influenza viruses, and antiretrovirals, like zidovudine, which fight HIV.
• Vaccines: Preventive vaccines protect against various viral diseases, such as the MMR vaccination against measles, mumps, and rubella and the HPV vaccine.

Fungal Infections

• Antifungal Medications: It involves treating the infection using such agents. Fluconazole, itraconazole, and terbinafine are some examples.
• Topical Preparations: Creams, ointments, and shampoos are applied in superficial mycoses. Examples of medications include clotrimazole or ketoconazole.

Parasitic Infections

• Antiparasitic Drugs: The drugs are specific for certain parasites. For example, ivermectin is used for some parasitic infections, while quinine is used for malaria.
• Prevention: Insect repellents, good sanitation, and mosquito nets can prevent parasitic disease.

General Measures

• Supportive Care: It comprises symptomatic management, including rehydrating the body through rest and pain management.
• Probiotics: These are, at times, given to reconstitute the normal flora, mostly after antibiotic therapy.

Yes, most health insurance plans cover diseases caused by microorganisms. These could range from common diseases like the cold and flu to pneumonia, tuberculosis, and even some viral infections. The finer points of coverage need to be glanced over in the policy. 

Though standard plans include coverage for diseases of this type, some, not all, might offer it. Coverage for such diseases could be hampered by pre-existing conditions. It is always advised to check your policy or check with an insurance provider to understand the extent of the coverage regarding microorganism-related illness. 

Microorganisms are everywhere, and they have high disease-causing ability. Unfortunately, it is almost impossible to prevent microbial infections entirely. However, some simple measures can help protect you from the transmission agents. In addition, it will prevent some common diseases caused by microorganisms in humans.

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