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Fever

Definition.

Fever is the temporary increase in the

body's temperature in response to a

disease or illness.

A child has a fever when the

temperature is at or above one of these

levels:

 (^) 100.4°F (38°C) measured in the bottom (rectally)  (^) 99.5°F (37.5°C) measured in the mouth (orally)  (^) 99°F (37.2°C) measured under the arm (axillary) An adult probably has a fever when the temperature is above 99°F to 99.5°F (37.2°C to 37.5°C), depending on the time of day. Also known as: Elevated temperature; Hyperthermia; Pyrexia; Febrile

Considerations.

» Fever is an important part of the body's defense against

infection. Most bacteria and viruses that cause

infections in people thrive best at 98.6°F (37°C).

» Brain damage from a fever generally will not occur unless the

fever is over 107.6°F (42°C).

» Unexplained fevers that continue for days or weeks are called

fevers of undetermined origin (FUO).

Causes. Almost any infection can cause a fever, example: » (^) Bone infections, appendicitis, skin infections or cellulitis, and meningitis » (^) Respiratory infections such as colds or flu-like illnesses, sore throats, ear infections, sinus infections, mononucleosis, bronchitis, pneumonia, and tuberculosis » (^) Urinary tract infections » (^) Viral gastroenteritis and bacterial gastroenteritis

Children may have a low-grade fever for 1 or 2

days after some immunizations.

Teething may cause a slight increase in a child's

temperature, but not higher than 100°F

(37.8°C).

Almost any infection can cause a fever, including:

» (^) Child: » (^) Is 3 months or younger and has a rectal temperature of 100.4°F (38°C) or higher » (^) Is 3 to 12 months old and has a fever of

102. child 2°F (39°C) or higher » (^) Is 2 years or younger and has a fever that lasts longer than 24 to 48 hours » (^) Is older and has a fever for longer than 48 to 72 hours » (^) Has a fever of 105°F (40.5°C) or higher, unless it comes down readily with treatment and the person is

When to Contact a Medical Professional

≈ (^) Adult: ≈ Have a fever that stays at or keeps rising above 103°F (39.4°C) ≈ (^) Have a fever for longer than 48 to 72 hours ≈ Have had fevers come and go for up to a week or more, even if they are not very high ≈ (^) Have a serious medical illness, such as a heart problem, sickle cell anemia, diabetes, cystic fibrosis. ≈ (^) Have pain with urination ≈ Have a new rash or bruises

THANK YOU for your attention. Reference: Neil K. Kaneshiro. (2020). Fever.. 10/10/2021, de Penn Medicine. Sitio web: https://www.pennmedicine.o rg/for-patients-and-visitors/p atient-information/conditions -treated-a-to-z/fever By: Joce y Xim