Ever since COVID-19 wreaked havoc, a persistent low-grade fever can seem scarier than usual. With the changing seasons, it is difficult to ascertain the cause. Low-grade fever occurs when the body temperature remains between 99.5°F (37.5°C) and 100.3°F (38.3°C) for more than 24 hours. There can be many reasons behind persistent low-grade fever.
Here are 5 health conditions that have a persistent low-grade fever as a symptom:
viral infections
Viruses can cause infectious diseases such as the common cold, flu, even serious illnesses such as Ebola and COVID-19. These protein-coated tiny microbes invade living, normal cells and use them to multiply and produce more viral cells. That’s what makes you sick. Often a common symptom of these viral infections is fever. If you think you have caught a viral infection, there are tests to find out for sure. From immunoglobulin blood tests, PCR tests to rapid tests and respiratory pathogens panels, your healthcare practitioner can guide you.
pneumonia
Pneumonia is an infection that causes inflammation of the air sacs in one or both lungs. The air sacs may fill with purulent contents, which may cause a low-grade fever. Other symptoms may include cough with phlegm or pus, chills, and difficulty breathing. Pneumonia can be caused by a variety of organisms, including bacteria, viruses, and fungi. Although it is not always life-threatening, the most severe cases are found in infants and young children, people over the age of 65, and people with health problems or weakened immune systems.
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urinary tract infection
Urinary tract infection or UTI is an infection of the urinary system. This may involve your urethra, kidneys, or bladder. While your urine usually does not contain bacteria, microorganisms can enter the urinary system from outside the body. It causes problems like infection and inflammation leading to urinary tract infection (UTI). While fever is not a common symptom of UTI, it can be seen occasionally. If your health care practitioner suspects a UTI, they will ask you to have a urinalysis and a urine culture.
tuberculosis
Tuberculosis is caused by a bacterium called Mycobacterium tuberculosis. This bacteria usually attacks the lungs. TB bacteria can attack other parts of the body, such as the kidneys, spine, and brain. There are two conditions related to TB: latent TB infection (LTBI) and TB disease. TB is a fatal condition so proper and timely treatment is essential. While fever is not a common symptom of TB, it is sometimes noted. LTBI patients do not feel sick, are asymptomatic, and cannot spread TB to others.
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thyroid inflammation
The thyroid is a butterfly-shaped gland in the neck. It is responsible for the production of hormones that regulate the growth and metabolism of the body. Inflammation of this gland is called thyroiditis. This causes the production of abnormally high or low levels of thyroid hormone. One effect of this is an increase in body temperature.
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