A disease is a condition that negatively impacts the functioning or structure of a human organ, and which isn’t caused by any direct external force. Diseases can be grouped into two broad categories: infectious and non-infectious. Non-infectious diseases are frequently termed medical illnesses that are linked to specific clinical manifestations. A perfect example of this is typhoid fever, which is caused by infection with bacteria transmitted by direct contact with an infected person’s bodily secretions. An example of an infectious disease, is flu.
Viral diseases spread by contact, usually involve bacteria or viruses. Some examples of viral infections include measles, chickenpox, influenza and shingles. The symptoms of each type of virus are very similar, though they are also diverse in their characteristics. Common symptoms of chicken pox include high fever, swollen lymph glands and a sore throat. In case of shingles, the patient will experience blisters, pain and itching.
Non-infectious infections include diseases such as hepatitis, cholera, diarrhea and viral meningitis. Non-infectious germs can affect both humans and animals. Examples of germs that cause infections in animals are bacteria and viruses. In the case of human infections, common symptoms include fever, loss of appetite and malaise. If these symptoms are exhibited repeatedly and persist for more than two weeks, it is highly likely to be a case of infectious diseases.
The major risk for infectious diseases lies in the transfer of bacteria or viral pathogens from one individual to another during crowded places such as health centers or nursing homes. Such contaminated food is then consumed by unknowing persons. The contamination of food supplies can lead to several types of diseases; some of them are typhoid fever, cholera and diarrhea. Food poisoning is also a cause of concern; it is caused by eating contaminated food. Other examples of infectious diseases include e-coli, hepatitis B, meningitis, rabies, syphilis and swine flu.
Contamination of water bodies is another way of spreading infectious diseases. It can occur when there are poor hygiene practices or during the construction of new establishments. Some bacteria that cause infections in humans can also infect animals when they consume contaminated food. Examples of these organisms include listeria and salmonella. In order to prevent the occurrence of infectious diseases, it is important to make sure that all persons are following proper hygiene measures.
Aside from direct contact with an infected person, other ways of transmission of infectious diseases exist. For instance, droplets of sweat or secretions can carry the germ responsible for infection. Similarly, bodily fluids such as blood, saliva and urine can act as a carrier of bacteria. For older persons, they are prone to suffer from this condition since they have less immunity than younger people. Although symptoms of these germs may not be immediately noticeable, they can pose a serious threat to your health.