5 Infectious Diseases

5 Infectious Diseases are illnesses caused by microorganisms such as bacteria, viruses, fungi or parasites. Many of these can be highly contagious, and some can even be deadly if left untreated. Examples of infectious diseases that can be deadly include influenza, AIDS, malaria and Ebola. Certain infections, such as bacteria, viruses, fungi and parasites, can pose a deadly threat to one’s life. These are infectious organisms known as pathogens can be contracted through contaminated food and water, bug bites or contact with other people carrying the pathogen.

What is the difference between infectious diseases and noninfectious diseases?


Many infectious diseases can be deadly if they’re left untreated. Bacterial infections like Salmonella, tuberculosis and bubonic plague can lead to serious illness and, in some cases, death. Viral infections such as HIV/AIDS, Ebola and smallpox are also dangerous; their contagiousness can spread quickly and cause epidemics in large numbers of people. It’s important to take preventive measures like proper hygiene and to avoid contact with sick people to reduce the risk of catching an infectious disease. Infectious diseases are illnesses caused by germs and parasites that can be spread from person to person. Some examples of fatal infectious diseases include HIV/AIDS, malaria, and COVID-19. When left untreated, these infections can be deadly.

5 Diseases Whose Infection Can Kill You

There are certain diseases whose infection has the potential to be deadly. This article will overview five life-threatening diseases and their symptoms, from bacterial infections to chronic illnesses. By understanding these dangers, you may be able to identify a problem before it develops into something more serious.


Malaria is a parasitic infection transmitted through the bite of an infected mosquito. Symptoms of malaria include fever, chills, severe headaches, shaking, fatigue, and dizziness. Important to seek medical advice if you experience these signs or symptoms, as it can be fatal if left untreated. Early detection greatly increases the chances of a successful outcome.

Malaria can also cause anemia, seizures, liver failure, and other serious health problems if not treated promptly. A rapid diagnostic test (RDT) will detect the presence of malaria parasites in the blood. Treatment includes antimalarial drugs administered orally or intravenously, depending on the severity of symptoms. Additionally, measures such as insecticide-treated mosquito nets and covering areas with clothing or mosquito repellent are suggested in prevention activities against malaria.


HIV stands for human immunodeficiency virus and can lead to Acquired Immune Deficiency Syndrome (AIDS). AIDS weakens the immune system, leaving the individual susceptible to multiple other illnesses. Without treatment, HIV can eventually lead to AIDS and death. Early diagnosis is critical to get the right combination of drugs to prevent the further progression of the virus. Symptoms include fever, fatigue, swollen glands, weight loss, and frequent respiratory infections.


TB exists as a bacterial infection of the lungs caused by Mycobacterium tuberculosis. While it is highly contagious, not everyone exposed to it will become infected. Because of its contagiousness, however, people must take extreme precautions to avoid becoming infected. Symptoms may include persistent coughing, night sweats, chest pains and shortness of breath. Untreated TB can be fatal. Treatment for TB consists of a combination of antibiotics and should be completed as soon as possible to prevent further spread or development into multi-drug resistant TB (MDR-TB).


TB can occur in any body part, but it is most commonly found in the lungs. People infected with TB may have little to no symptoms, which makes it highly contagious and difficult to detect. Symptoms can include a fever, night sweats, fatigue, chest pains, and coughing up blood or sputum. If untreated, TB infection can quickly become a serious condition with life-threatening complications. It’s important that anyone who suspects they may have a TB infection seek medical attention as soon as possible for proper diagnosis and treatment.


Ebola Virus Disease (EVD) is a deadly virus that was initially identified in Zaire in 1976. It is transmitted through contact with the blood, secretions and organs of people who have or may have EVD. Symptoms may include fever, headache, joint and muscle pain, sore throat, weakness, diarrhea and vomiting. EVD can be fatal if left untreated within a few days or weeks. Treatment involves supportive therapy, such as administering fluids and electrolytes to maintain blood pressure and oxygen levels.

Contact tracing is used to identify and monitor individuals who have been in contact with someone who has tested positive for Ebola. It is also important for people living in or travelling to an area where there is an outbreak to take steps. Such as washing hands regularly, avoiding contact with those who are known or suspected to have the virus, and avoiding eating bushmeat can be a source of the virus. A vaccine is currently under development and may soon become available.

Yellow Fever

Yellow fever is a viral disease spread primarily by infected mosquitoes. It affects people in parts of Africa and South America and can be fatal if not treated promptly. Symptoms may include fever, muscle pain, headache, yellowing skin, jaundice, fatigue, difficulty breathing and nausea. Treatment typically involves supportive care such as fluids to prevent dehydration or oxygen supplementation if needed. Vaccination is recommended for those living in or travelling to affected areas.

Yellow fever can be very serious, as it can progress to hemorrhagic fever, shock and ultimately death in some cases. In addition, the virus can pass from infected mother to child during pregnancy. Vaccination and vector control are the most effective ways to prevent the spread of disease. Furthermore, early recognition and treatment of those infected are important for improved outcomes.

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