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Overview of Fever in Infection

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Fever is a symptom of different medical conditions and illnesses, especially infections. To know more, continue reading.

Medically reviewed by

Dr. Nagaraj

Published At April 19, 2023
Reviewed AtApril 19, 2023

Introduction:

Fever is a typical symptom of infection; it occurs as a result of the body's immune response to fight off the infection. Different types of fevers can be caused by different pathogens, such as bacteria, viruses, fungi, and parasites, and can affect different parts of the body, such as the respiratory system, urinary system, and gastrointestinal system. When an infection is detected by the body, different chemicals are produced by the body's immune system, such as cytokines, which can cause inflammation and activate the body's fever response.

Fever is a natural defense mechanism that guides the body to fight off the infection by raising the body's temperature and making it a less hospitable environment for the invading pathogen.

The severity and duration of a fever can vary depending on the type of infection and the immune system response of the infected person. In some cases, fever may be a mild symptom that resolves on its own, while in other cases it may be a sign of a more serious infection that requires proper medical attention and treatment.

What Are the Different Types of Fever in Infections?

Fever is a symptom of many different types of infections. Some types of fever that may occur with various types of infections are as follows:

  • Acute Fever: Acute fever usually develops suddenly and can last for a short time. It is commonly associated with acute infections such as flu, colds, and ear infections. Acute fever can also be caused by non-infectious conditions such as autoimmune diseases, inflammatory disorders, and medication side effects.

  • Chronic Fever: Chronic fever lasts for a longer period, usually about two weeks or more, and is associated with certain chronic infections such as tuberculosis or HIV (Human immunodeficiency virus).

  • Sustained Or Continuous Fever: In this type of fever, the temperature remains above the normal range and it does not show any fluctuations, examples are fever in bacterial endocarditis, typhoid fever, and urinary tract infections (UTIs).

  • Intermittent Fever: Intermittent type of fever usually occurs in cycles, the temperature of the body associated with this type of fever keeps on rising and falling over a while. Examples of intermittent fever are fever associated with malaria, septicemia, and bacterial infections.

  • Remittent Fever: It is a similar type of fever to intermittent fever, but fluctuations in temperature occur more widely and do not return to normal levels. It is often seen in infectious diseases such as dengue fever, typhoid fever, and septicemia.

  • Pel-Ebstein Fever: This fever is associated with Hodgkin's lymphoma and is characterized by fever cycles that last for one to two weeks.

  • Septic Fever: This type of fever occurs in response to a severe infection and is characterized by a high temperature and the fever does not respond to any antipyretic medication.

  • Postoperative Fever: Postoperative fever is associated with surgery and surgical site and is often caused by an infection at the surgical site.

What Are Common Signs and Symptoms Associated With Fever Caused by Infection?

Fever itself is a symptom of infection, and it can be accompanied by a range of symptoms. Some common symptoms are:

  • Elevated Body Temperature: A fever is defined as a body temperature above the normal range, which is generally considered to be 98.6 degrees Fahrenheit (37 degrees Celsius) taken orally. A fever in infection may range from a mild elevation of temperature to a high fever of over 102 degrees Fahrenheit (38.9 degrees Celsius) or more.

  • Chills: Chills may occur as the body tries to generate heat to increase its temperature to fight off the infection.

  • Headache: Headaches are symptoms associated with fever in an infection, and can be caused by the release of inflammatory chemicals in the body.

  • Body Aches And Muscle Pain: Body aches and pains throughout the body are common symptoms of fever in an infection, and can be caused by inflammation and muscle tension.

  • Fatigue: Fatigue and weakness are common symptoms of fever in an infection, and can be caused by the body's immune response and metabolic changes.

  • Sweating: Sweating is a common symptom of fever in an infection, and can be caused by the body's attempt to cool down by releasing heat through the skin. It is performed by the glands present under the skin.

  • Loss of Appetite: A loss of appetite is a common symptom of fever in an infection, as the body is more focused to prioritize the energy towards the immune response rather than digestion.

If the fever persists for a longer time with symptoms like difficulty breathing, persistent high fever, chest pain, or confusion, it is better to visit a healthcare professional immediately.

How to Treat Fever in an Infection?

The treatment of fever in an infection depends on the cause of the infection, the severity of the fever, the individual's health, and any underlying diseases. However, general measures that can help manage fever in infection are as follows:

  • Stay Hydrated: It is necessary to drink plenty of fluids such as water, fruit juice, or broth to prevent dehydration (a common complication of fever).

  • Rest: Trying to get adequate rest, as it can be a useful tool to conserve the body's energy and aid in healing.

  • Manage Temperature: Use of a cool compress, taking a cool bath or shower, or wearing light clothing can help to lower body temperature and relieve discomfort associated with the fever.

  • Medications: Over-the-counter (OTC) fever-reducing medications such as Acetaminophen or Ibuprofen help to lower body temperature and relieve symptoms such as headaches and body aches. It is important to follow the recommended dosage and consult a healthcare provider if there are any concerns or if the fever persists even after taking the medicines.

  • Addressing the Underlying Infection: Treating the underlying infection with antibiotics, antiviral medication, or other treatments may be necessary to resolve the fever. Visit the doctor for proper dosages and prescriptions.

Conclusion:

It is important to note that not all infections will cause a fever, and not all fevers are caused by infections. Other conditions can cause a fever, such as autoimmune disorders, certain medications, and even some types of cancer. If the fever lasts more than a few days or is accompanied by other symptoms, it is important to seek medical attention to determine the underlying cause.

Frequently Asked Questions

1.

How Is Fever an Indicator of Infection?

The hypothalamus is a part of the brain that regulates the body temperature. In case an infection invades the body, or in cases of illness or other causes, the hypothalamus may increase the body’s temperature. So whenever fever sets in, it is an indicator that something is wrong in one’s body. One gets a fever because the body is trying to act against and kill the bacteria or virus causing the infection.

2.

What Type of Infections Cause Fever?

Fevers below 104 degrees Fahrenheit or 40 degrees Celsius are commonly linked with viral infections like the flu. These fevers are not harmful and help the immune system fight against the disease. Fever may usually be caused by a viral or bacterial infection, heat exhaustion, a cancerous tumor, certain inflammatory conditions, medications like antibiotics and drugs used to treat elevated blood pressure or other conditions, and some immunizations.

3.

How Long Does Fever Due to Infection Last?

The duration of the fever is determined by its cause. If fever is due to infection, it will usually resolve within three to four days. However, Dengue fever can persist for 10 days or more. The temperature of viral fevers ranges from 99 degrees Fahrenheit to over 103 degrees Fahrenheit, depending on the virus causing the fever. However, one must seek medical attention if fever persists for a long time and is accompanied by breathing changes.

4.

Does Fever Occur Only With an Infection?

A fever can be the first or only sign of an infection. In the case of certain infections, one might have other symptoms without having a fever. When treated appropriately, fever resolves independently, and in case of bacterial infection, it abates with antibiotics. The occurrence of fever signifies the body’s normal mode of fighting against infections. However, one must seek medical attention if fever persists for a long time and is accompanied by breathing changes.

5.

How to Differentiate Between Viral Fever and Fever Caused by Other Infections?

Since all fevers may cause irritability, discomfort, sweatiness, and so on, medical intervention is necessary to identify the underlying cause. Usually, the symptoms of viral infection last for a shorter duration. When treated appropriately, fever resolves independently, and in case of bacterial infection, it abates with antibiotics.

6.

How Can Fever Due to Infection Be Reduced?

Fever due to infection can be reduced in the following ways:


- Taking Ibuprofen or Acetaminophen.


- Drinking plenty of fluids.


- Eating light foods that are easily digestible.


- Take plenty of rest.


- Apply cool compresses to the skin.


- Wearing lightweight clothing.

7.

Can Fever Be Caused Due to Bacterial Infection?

The major symptom of bacterial infection is fever, except in cases of skin infections. In skin infections, pain and redness are caused in the skin. The symptoms of bacterial infections usually last for 10 to 14 days or even more. Other signs of bacterial infection include tiredness and swollen lymph nodes in the armpits, groin, neck, or any other region.

8.

What Are the Major Symptoms of Infection?

A fever can be the first or only sign of an infection. Other signs and symptoms include:


- Chills and sweats.


- Shortness of breath.


- Nasal congestion.


- Sore throat or development of new mouth sore.


- Changes in cough or development of new cough.


- Diarrhea.


- Vomiting.


- Stiff neck.


- Increased urination or burning or pain during urination.


- Abdominal or rectal pain.


- Redness, soreness, or swelling in a particular area.

9.

Is a Fever an Indicator of Infection or Inflammation?

Fever is a hallmark feature of inflammatory and infectious diseases. A fever is the body’s natural method of acting against inflammatory stimuli like a virus or infection. The hypothalamus is a part of the brain that regulates the body temperature. In case of an infection invades the body, or in cases of illness or other causes, the hypothalamus may increase the body’s temperature.

10.

Can Fever Due to Infection Come and Go?

Usually, if an infection causes a fever, it should resolve within three to four days. If the fever persists or symptoms worsen beyond three to four days, one must seek medical help. If it is not treated, then it can result in severe complications. It is normal for a fever to come and go throughout the day.

11.

Is Fever High With Bacterial or Viral Infection?

Usually, the immune system in the body clears viral infections more easily than bacterial infections. Compared to bacterial infections, viral infections can be less severe, meaning that fever may be lower with viral infection than a bacterial infection. The temperature of viral fevers ranges from 99 degrees Fahrenheit to over 103 degrees Fahrenheit, depending on the virus causing the fever.

12.

How to Know if a Fever Is Due to a Viral Infection?

The temperature of viral fevers ranges from 99 degrees Fahrenheit to over 103 degrees Fahrenheit, depending on the virus causing the fever. Both viral and bacterial infections may have similar symptoms. A healthcare professional may rule out bacterial infection by analyzing the medical history and symptoms, taking samples to test for bacteria, and taking a throat swab to test for bacteria in case of sore throat. A blood sample may be taken to detect certain markers that may signify a viral infection.

13.

What Are the Various Stages of Infection?

The following are the various stages of infection:


- Incubation.


- Prodromal (stage before the characteristic symptoms of infection manifest).


- Illness.


- Stage of decline.


- Convalescence (final stage of infection wherein the symptoms tend to resolve).

Dr. Nagaraj
Dr. Nagaraj

Diabetology

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