Different types of microorganism lives in our body. Some of these are quite useful for the body. Some of them are not useful, but not harmful. Many of them again becomes harmful at certain conditions or for a particular reason. And makes people sick.
The diseases that occur due to microorganisms is called infectious diseases. In order to survive or spread, the infectious organisms use the body cells. And organize themselves in a healthy environment of the body. Special environment or location of the people can play important role in the spread of diseases.
After entering into the body the microorganisms destroy white blood cells, different types of antibodies and other disease-resistant organisms of the body. And different symptoms of fever, headache, rashes or illness occur.
How to Control Infectious Diseases?
Anyone may be infected with contagious diseases at any time. The risk of getting infected by the individual depends whether the microbes creates any toxic chemicals; Or can they disable the body’s immune system?
So those people whose immune systems are weak; They are more likely to be affected. The patients infected with HIV or AIDS; as a result of cancer, the patients immune system weakens.
Most infectious diseases are often less complicated. But in some cases they may become life damaging. For example: pneumonia, brain lesions (menengitis), AIDS etc. Some germs can again cause of cancer in the future.
For example, cancer of the uterine mouth, helicobater pylori from Human Papilloma virus, and cancer of the stomach, Hepatitis B and C are at risk of liver cancer. Infectious diseases can spread through either direct or indirect.
Humans to humans spreading:
In this case, bacteria, viruses, or any other microbes directly enter the healthy body from the infected person. Healthy people may be infected with sneezing, coughing, touching or chewing of infected person.
From animals to humans:
This disease spreads from the bite or scratched from any infected animal or even pet.
Even after cleaning the stomach stool or urine of the pet, there is a danger of being infected.
From mother to newborn:
Newborns may be infected from pregnant mothers. Sometimes there is a risk of entering the body of a newborn baby from the mouth of the uterus during pregnancy or at any time during delivery.
Some germs enter the human body through contaminated foods or water or with contaminated air or any other pollutant or polluted medium.
Some germs may survive for some time depending on the inert material without any living organisms. In that case, the germs are likely to enter the human body indirectly.
For example, any healthy man will be infected with flu, if he uses the materials of the infected person.
People are generally infected with bacteria, viruses, fungus and parasites.
This micro organisms can survive in almost all types of weather around the world.
In addition to humans, bacteria also live in water or soil, plants and other animals body. Some may also fly in the air. Bacteria can grow rapidly in the animal body.
The bacteria that live in the human body, less than 1% of them are harmful for the body.
Some bacteria helps in digestion; some are to destroy the cells related to the disease; some helps in providing nutrition for the body.
In the attack of harmful bacteria, can cause Bronchitis, influenza, Cyanocytes, hooping cough, inflammatory throat pain, pneumonia, inflammatory infections of the airways, urinary tract infections, tetanus, Rheumatic fever, tuberculosis, cholera, dysentery, typhoid, leprosy, plague, diphtheria, anthrax etc.
These types of germs can not grow by itself; Rather, it penetrates through the cells of the host. With the help of cell growth and reproduction process, it creates new cells on the host body and spread the number of viruses.
Starting from the usual cold, Dengue, Yellow Fever, Hum, Mumps, Chikungunya, Rabies, Ebola, Polio, Zika, Mole etc are the viral infectious diseases. Even they can attack liver, respiratory and blood-related processes.
AIDS is a disease that is contagious by the immunodeficiency virus; Which gradually destroys the body’s immune system.
These micro organisms can live and survive on the basis of wind, soil, water or vegetation. Some fungi can survive in humans body. The amount of fungus seen in the environment, only half them are harmful for the body.
Wounds in the forearm, under the toes and in the skin are the result of fungus attack.
In addition to various types of skin diseases, some fungi can also attack the lungs or nerve system.
Parasites are very small organisms which depend on other living organisms to survive.
People can contagious with this germs by contaminated foods, water, pests, insect bites etc. that are infected with this germs. For example, small parasites of malaria enter the human body by bites of mosquitoes.