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This free and downloadable eBook will teach you everything you need to know about infectious diseases and how they affect the human body. Topics include: What is an infectious disease? What are the major categories of pathogens? How does an infection happen to a person's body? How do we diagnose and treat an infection?? Simply follow this link for instructions on how to download your free copy: http://bit.ly/2BDrvA6 You may also like our blog, where we post new articles about all things health-related! Check it out at https://www.publichealthcorps.org/blog/. Infectious disease is a medical condition that is the result of an infection caused by a specific agent or agents, known as pathogens. A pathogen can be a virus, bacterium, fungus, parasite or prion. Infectious diseases typically have symptoms and signs that help to identify them. These can include fever, diarrhea, arthritis, coughing blood or muscle aches. Infectious diseases are also known for their ability to cause epidemics of illness if not controlled properly. An example of this would be smallpox in the early 20th century, which killed hundreds of millions around the world because it was not identified as an infectious disease until it had already begun to spread quickly. This led to many people becoming ill or dying. An infectious disease can also be caused by harmful chemicals or other environmental factors, for example asbestos-related diseases are one of the most common forms of cancer in the world. Some infectious diseases are preventable, such as the infections that occur after an operation are usually avoided by scrubbing with antiseptic solutions before the operation begins. The presence of pathogens in body fluids is called infection.. An infection may be either localised where it only affects a small area of the body, or it can be systemic if it spreads throughout the whole body.Sudden weight loss, weakness and fatigue. Swollen lymph nodes in the neck, underarms and groin. Chronic infection of the nose and sinuses. Varies between individuals, but common symptoms of chronic sinusitis include headache, facial pain and pressure, toothache, bad breath, fullness in the ears and nasal discharge.Fever that varies between cycles of not being able to maintain a low temperature (febris paroxysmalis) and having a very high temperature (febris continua), sweating on and off and feeling tired and weak (asthenia). Lungs fill with fluid causing breathing difficulties (pleurisy). Skin rash on chest or back (pellagrin). Myalgia or muscle aches are also common.Diarrhea, abdominal cramps, nausea, vomiting, headaches. Generalised body aches.Some infectious diseases are very minor and can be cured with basic first aid care, however some of them can be fatal if left untreated. A viral infection of the respiratory tract for instance is usually self-limiting and will clear up within a week or two if it is properly managed with rest and plenty of fluids to prevent dehydration. This is very different from infections caused by bacteria such as TB which can be fatal if it is not treated in a timely manner because it could spread into the lungs where there are more bad bacteria that could lead to pneumonia or meningitis. cfa1e77820
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