CMV - pneumonia
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CMV - pneumonia

Definition

Cytomegalovirus (CMV) pneumonia is an infection of the lungs that can occur in people who have a suppressed immune system.

See also:

Alternative Names

Pneumonia - cytomegalovirus; Cytomegalovirus pneumonia

Causes

CMV pneumonia is caused by a member of a group of herpes-type viruses. Infection with CMV is very common. Most humans are exposed to CMV in their lifetime, but typically only individuals with weakened immune systems become ill from CMV infection

Serious CMV infections can occur in people with weakened immune systems from conditions such as:

In people who have had organ and bone marrow transplants, the risk of infection is greatest 5 - 13 weeks after the transplant.

Symptoms

In otherwise healthy people, CMV usually produces no symptoms. or a temporary mononucleosis-type illness. Those with weakened immune system can develop serious symptoms, however. Symptoms may include:
  • Cough
  • Fatigue
  • Fever
  • General discomfort, uneasiness, or ill feeling (malaise)
  • Loss of appetite
  • Muscle aches or joint pains
  • Shortness of breath
  • Shortness of breath on exertion
  • Sweating, excessive (night sweats)

Exams and Tests

The doctor or nurse will perform a physical exam. The following tests may be done:

Treatment

The objective of treatment is to stop the virus from copying in the body through the use of antiviral drugs. Some people with CMV pneumonia will need to get medication through a vein (intravenously). Some people might initially need oxygen therapy and breathing support with a ventilator to maintain oxygen until the infection is brought under control.

Outlook (Prognosis)

Antiviral medications stop the virus from copying itself, but do not destroy it. The CMV suppresses the immune system, and may increase your risk of other infections.

Low oxygen levels in the blood in people with CMV pneumonia often predicts death, especially in patients who need to be placed on a breathing machine.

Possible Complications

Complications of CMV infection in people with AIDS include:

  • CMV pneumonia
  • Esophageal disease
  • Intestinal disease
  • Inflammation of the retina (CMV retinitis)

Complications of CMV pneumonia include:

  • Kidney impairment (from drugs used to treat the condition)
  • Low white blood cell count (from drugs used to treat the condition)
  • Overwhelming infection that doesn't respond to treatment
  • Return of CMV infections

When to Contact a Medical Professional

Call your health care provider if you have symptoms of CMV pneumonia.

Prevention

The following have been shown to help prevent CMV pneumonia in certain patients:

  • Using organ transplant donors who don't have CMV
  • Using CMV-negative blood products for transfusion
  • Using CMV-immune globulin in certain patients

Preventing AIDS avoids certain other diseases, including CMV, that can occur in people who have a weakened immune system. Certain people with AIDS who have a CD4 count of less than 100 should consider taking preventive treatment for CMV.

References

Drew WL. Cytomegalovirus. In: Goldman L, Schafer AI, eds.Cecil Medicine. 24th ed.Philadelphia,PA: Saunders Elsevier; 2011:chap 384.


Review Date: 12/6/2011
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School, Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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