| April 1, 2006 | CONTACT AUTHOR
Please address all correspondence to: Victoria Bengualid, MD Department of Medicine 7th floor St. Barnabas Hospital 183rd Street and 3rd Avenue Bronx, NY 10457 vbengualid@pol.net
|
ShareThis
|
Haider K1, Qadir A1, Mujibur R1, Judith Berger2, Victoria Bengualid2
Keywords: adenovirus, immunocompetent adult
Adenoviruses are associated with a variety of clinical syndromes and cannot be diagnosed based upon clinical criteria alone. Among children it can cause endemic respiratory disease, gastroenteritis and conjunctivitis1,2. Most of these infections are self limited, with severe or disseminated disease confined to immunocompromised patients, like patients with AIDS and transplant recipients3,4. Among healthy adult’s severe morbidity and mortality due to adenovirus infection is distinctly unusual5. In immunocompetent adults it gained attention initially in 1950s and 1960s, prior to development of vaccine, due to epidemic of adenovirus serotypes 4 and 7 in military recruits6. Its ability to cause severe disease in healthy adults has become major concern recently due to fulminant cases out breaks including two deaths in military recruits reported by Center of Disease Control7. We describe a well documented fatal case of adenovirus pneumonia in an immunocompetent young male, and we discuss potential clinical features of this rare but life threatening disease. It will underscore the need to consider this infection early, even in immunocompetent adults who do not respond to usual treatment.
A healthy 35 year-old male presented with a four-day history of severe abdominal pain, vomiting, watery diarrhea, fever, chills and a two-day history of dry cough and dyspnea. He was febrile with a tender abdomen. An CT scan was negative for appendicitis. His initial chest examination revealed bilateral diffuse wheezes and left base crackles. His respiratory rate was 16 and he was saturating 100% on room air. Laboratory workup was significant for a white blood cell count (7,100/mm3), thrombocytopenia (81000/U), elevated SGPT (48IU/L) SGOT (122IU/L) and creatinine (1.5mg/dl). Chest X-ray showed left lower lobe consolidation.
Despite ceftriaxone and levofloxacin, he remained febrile. Blood, stool and sputum cultures were negative. HIV and mycoplasma antibodies, and urine legionella antigen were negative. On day 4 his vomiting and diarrhea resolved but he remained febrile. His CPK was 7415 IU/L with 16% MB fraction. EKG remained normal. Chest X-ray showed bilateral infiltrates and left pleural disease.
On day six he became short of breath. His chest CT chest showed a left lower lobe and a right upper lobe infiltrates.
On day eight, he was intubated for worsening hypoxia, had several episodes of bradycardia and died. Autopsy lung cultures grew adenovirus.
Severe adenovirus respiratory infections in immunosuppressed individuals have been well described but few cases have been reported in immunocompetent adults8,9. This case illustrates some of the typical features of adenovirus pneumonia, which if recognized earlier, could prompt a more timely diagnosis. These features include: 1. no positive cultures and no response to treatment for atypical pneumonias, 2. one-week presentation with dyspnea, cough, high-grade fever, rhonchi or wheezes which rapidly progresses to respiratory failure and shock5,7,10, 3. chest x-ray with a focal infiltrate, which is unusual for most viral pneumonias3,5,7,10. In addition our case presented with gastroenteritis, which has also been reported with adenovirus pulmonary infections, as well as myocarditis, another feature of adenovirus infections but not previously described with pneumonias.
Nasopharyngeal aspirate or swab, throat swab, sputum or tissue cultures are the most sensitive and specific method for detecting adenovirus. Recent infection can be documented by assay of paired acute and convalescent sera for adenovirus specific antibodies. Most cases of adenovirus are self-limited. Currently no antivirals are approved for treatment. Cidofovir has been shown effective in some cases, although in vitro resistance has occurred11.