Introduction
Neutrophils are a type of white blood cell. Neutrophils play vital roles in acute viral infections.
They restrict viral replication and diffusion through -
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Phagocytosis (cell eating).
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Degranulation (for release of anti-microbial cells).
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Respiratory burst, secretion of cytokines (proteins).
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The release of neutrophil extracellular traps also activates the adaptive immune response.
Some characteristics and functions of neutrophils, such as cell number, lifespan, and antiviral capability, get over-activated while eliminating viruses.
What Is Meant by Neutrophilia?
Neutrophilia is a condition that occurs when the body produces too many neutrophils. Neutrophils are white blood cells. As such, they are involved in fighting infection. Sometimes, they stay fighting the infection much longer. If the bloodstream has too many neutrophils, it can result in leukocytosis (a high count of white blood cells). This condition can cause fever or recurring infection. This condition is treated by managing the underlying condition.
What Are the Conditions That Affect Neutrophils?
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Neutropenia:
In this condition, the count of neutrophils is too low, resulting in recurrent infection and swelling. The causes of this condition include cancer treatment, infection, or autoimmune conditions.
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Neutrophilia:
This condition occurs when the count of neutrophils is very high. This is generally caused due to bacterial infection.
What Is Acute Acquired Neutrophilia?
Acute acquired neutrophilia is defined as a higher neutrophil count in the given blood sample than the normal range caused by infections, inflammation, or neoplastic processes.
Acute-acquired neutrophilia occurs in the body due to the overproduction of neutrophils. Neutrophils help fight infection. If neutrophils increase in the bloodstream, leukocytosis or a high total white blood cell count is likely to develop. The presence of symptoms such as fevers or recurring infections is an indication of an underlying condition that is causing neutrophilia.
What Causes Acute Acquired Neutrophilia?
Neutrophilia is the body’s reaction to an invader, which can emerge from a severe blood disorder, everyday infection, or a stressful day at work. Neutrophilia is divided into two categories - primary and secondary.
Primary Neutrophilia Causes -
The person can be born with neutrophilia. Other causes include:
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Chronic Myelogenous Leukemia - It is a form of blood cancer (leukemia) that affects the white blood cells.
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Essential Thrombocytosis (ET) - It is a rare disorder in which the body produces too many platelets.
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Polycythemia Vera -This is a blood disorder when the bone marrow produces too many red blood cells.
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Juvenile Myelomonocytic Leukemia (JMML) - It is a rare blood cancer that typically affects children and happens when certain white blood cells do not mature normally.
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Chronic Neutrophilic Leukemia - This is a rare blood cancer that happens when the bone marrow makes too many neutrophils.
Secondary Neutrophilia (Acquired Neutrophilia) Causes -
Secondary neutrophilia causes are associated with various infections, inflammation caused by medical conditions, and the body’s reaction to stress. Some causes may include:
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The presence of an Infection can lead to inflammation.
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Acute, chronic inflammation is caused by rheumatoid arthritis and inflammatory bowel disease.
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Vasculitis (inflammation seen in the blood vessels).
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Injuries or sudden trauma.
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Reactions to tumors.
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Adverse reaction to a medication.
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Physical or emotional stress.
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Smoking cigarettes.
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Vigorous exercise.
What Is the Difference Between Neutrophilia and Neutropenia?
Neutropenia happens when the neutrophil count is lower than average. Neutrophilia can develop from infections or some cancer treatments.
What Are Neutrophilia Symptoms?
Neutrophilia itself is usually asymptomatic. However, a high cell count points toward an underlying condition that can cause the following symptoms:
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Temperatures above 100.4 degrees Fahrenheit (38 degrees Celsius).
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Fatigue, weak or tired.
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Drowsiness, dizziness, or fainting.
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Repeated episodes of infection.
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Ulcers and wounds are not able to heal properly.
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Pain and inflammation are present in the joint area.
How Is Neutrophilia Diagnosed?
Neutrophilia is most often a sign of underlying illness. Healthcare providers usually do physical examinations to look for infection, inflammation, or blood disorders. The test includes a complete blood count (CBC). The test results interpret the total number of white blood cells and how many white blood cells are neutrophils.
What Is the Range for a Normal Neutrophil Count?
The normal neutrophil count can vary based on factors such as age. Generally, the average neutrophil level for an adult is 1,450 to 7,500 neutrophils per microliter. Acute-acquired neutrophilia occurs when more than 7,500 neutrophils per microliter are seen in a given blood sample. Leukocytosis occurs when there are more than 11,000 total white cells per microliter.
How Is Neutrophilia Treated?
Neutrophilia is not a condition that can be treated. It is a sign of underlying conditions, such as infection and inflammation, and a vital sign of more serious conditions like blood disorders and blood cancer. Sometimes, neutrophilia is the body’s reaction to medication or stress. Therefore, treating the underlying etiology helps eradicate acute acquired neutrophilia.
Is There Any Complication Associated With Neutrophilia?
The complications of neutrophilia are the following:
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Blood hyperviscosity (or thrombophilia is the increased tendency of blood to thrombose) is associated with leukemoid reactions (increased white blood cell count).
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Bacteremia, septic (infection) shock, and multiple organ failure in untreated infections.
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Wound healing disorder, severe periodontitis (dental gum disease), and severe mental impairment.
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Thrombosis (multiple blood clots inside a blood vessel), hemorrhage (blood loss), and transformation to acute leukemia (development of cancer).
How to Reduce the Risk of Developing Neutrophilia?
Generally speaking, neutrophilia cannot be prevented. One can be born with neutrophilia (congenital neutrophilia) or develop it (acquired neutrophilia) because of an underlying medical condition. If a severe underlying condition is absent, the risk of developing neutrophilia can be reduced by taking good care of the health. For example:
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Exercise and maintain a healthy weight.
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Meditate for stress reduction.
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Have a strong immunity to fight seasonal colds and flu.
What Is the Prognosis for Neutrophilia?
In the case of acute acquired neutrophilia, the prognosis, or expected outcome, depends on the underlying medical condition triggering the overproduction of neutrophils. Neutrophilia associated with infection and inflammatory state resolves with the resolving of the conditions. Drug-related neutrophilia may be resolved by discontinuing treatment or discontinuing the drug.
Conclusion
Neutrophilia happens when the body produces too many neutrophils, a type of white blood cell that fights off infections. Neutrophilia can reveal itself after routine blood tests. A larger-than-normal neutrophil count is the body’s reaction to changes. If blood tests show the neutrophil count is higher than it should be, healthcare providers may perform additional tests to diagnose the underlying condition.
