Risk Classification for Respiratory Viral Infections in Adult Solid Organ Transplantation Recipients.

Introduction: Molecular testing such as nasopharyngeal viral polymerase chain reaction (PCR) (NVP) is available now in most hospitals and widely used to identify respiratory viral infections (RVIs) in solid organ transplantation (SOT) recipients.

Materials And Methods: A retrospective multicenter study at 8 hospitals from March 1, 2016, to April 30, 2019. We included all adult SOT recipients who were admitted to the hospitals and had their first NVP post transplantation.

Results: A total of 102 adult SOT recipients were enrolled. NVP test was positive in 33 (32.4%) SOT recipients and negative in 69 (67.6%). Median age was more than 60 years old with female predominance in both groups. The majority of patients who had positive NVP were hospitalized either in fall or winter seasons (91%). RVI symptoms were documented in about 73% of the positive NVP group. Rhinovirus was the most common identified virus (48.4%). On logistic regression analysis, clinical presentation in fall or winter seasons, presenting with upper respiratory infection (URI) symptoms and taking prednisone ≥10 mg/d were significantly associated with positive NVP. This model classified patients into 3 categories of risk for RVIs-low (none of the variables), 0%; intermediate (1 variable), 6.5%; and high (≥2 variables), 55.4% with P < .001 for all predictors.

Conclusion: SOT recipients who are taking prednisone (≥10 mg) and have URI symptoms in fall or winter seasons are more likely to have RVIs.