Lethal human metavirus pneumonia in a patient with chronic lymphocytic leukemia

Area of Science:

• Medical Microbiology
• Pulmonology
• Hematology

Background:

• Human metapneumovirus (HMPV) typically causes mild, flu-like respiratory illness, common in early childhood with frequent reinfections.
• While generally mild, HMPV infections can be severe in older adults and those with comorbid conditions, particularly hematological malignancies.
• The COVID-19 pandemic created diagnostic challenges, potentially masking other respiratory pathogens.

Purpose of the Study:

• To report a rare case of severe HMPV infection in an elderly patient with chronic lymphocytic leukemia.
• To emphasize the increased risk of severe HMPV outcomes in immunocompromised individuals.
• To highlight the importance of a broad diagnostic approach for respiratory infections.

Main Methods:

• Case report of an 81-year-old male with chronic lymphocytic leukemia presenting with respiratory symptoms.
• Diagnostic workup including testing for SARS-CoV-2 and other respiratory pathogens.
• Clinical observation, intensive care unit admission, and mechanical ventilation.

Main Results:

• Initial suspicion of SARS-CoV-2 infection was ruled out; HMPV was identified as the causative agent.
• The patient exhibited severe bilateral pulmonary infiltrates and rapid clinical deterioration.
• Despite intensive care and mechanical ventilation, the patient died on day 5 of admission.

Conclusions:

• Severe HMPV infection is rare but poses a significant threat to patients with hematological diseases.
• Immunocompromised individuals, such as those with chronic lymphocytic leukemia, are at high risk for severe HMPV outcomes.
• This case underscores the need for vigilance and comprehensive diagnostics in managing respiratory infections in vulnerable patient populations.