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Impact of Community Respiratory Viral Infections in Urban Children with Asthma



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  • Description:
    Background: Upper respiratory tract viral infections cause asthma exacerbations in children. However, the impact of natural colds on children with asthma in the community, particularly in the high-risk urban environment, is less well defined. Objective: We hypothesized that children with high-symptom upper respiratory viral infections have reduced airway function and greater respiratory tract inflammation than children with virus-positive low-symptom illnesses or virus-negative upper respiratory tract symptoms. Methods: We studied 53 children with asthma from Detroit, Michigan, during scheduled surveillance periods and self-reported respiratory illnesses for 1 year. Symptom score, spirometry, fraction of exhaled nitric oxide (FeNO), and nasal aspirate biomarkers, and viral nucleic acid and rhinovirus (RV) copy number were assessed. Results: Of 658 aspirates collected, 22.9% of surveillance samples and 33.7% of respiratory illnesses were virus-positive. Compared with the virus-negative asymptomatic condition, children with severe colds (symptom score =5) showed reduced forced expiratory flow at 25% to 75% of the pulmonary volume (FEF25%-75%), higher nasal messenger RNA expression of C-X-C motif chemokine ligand (CXCL)-10 and melanoma differentiation-associated protein 5, and higher protein abundance of CXCL8, CXCL10 and C-C motif chemokine ligands (CCL)-2, CCL4, CCL20, and CCL24. Children with mild (symptom score, 1-4) and asymptomatic infections showed normal airway function and fewer biomarker elevations. Virus-negative cold-like illnesses demonstrated increased FeNO, minimal biomarker elevation, and normal airflow. The RV copy number was associated with nasal chemokine levels but not symptom score. Conclusion: Urban children with asthma with high-symptom respiratory viral infections have reduced FEF25%-75% and more elevations of nasal biomarkers than children with mild or symptomatic infections, or virus-negative illnesses. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    1081-1206
  • Document Type:
  • Funding:
  • Genre:
  • Place as Subject:
  • CIO:
  • Topic:
  • Location:
  • Volume:
    122
  • Issue:
    2
  • NIOSHTIC Number:
    nn:20055187
  • Citation:
    Ann Allergy Asthma Immunol 2019 Feb; 122(2):175-183.e2
  • Contact Point Address:
    Marc B. Hershenson, MD, University of Michigan Medical School, 1150 W. Medical Center Dr., Building MSRB2, Room 3570B, Ann Arbor, MI 48109-5688
  • Email:
    mhershen@umich.edu
  • Federal Fiscal Year:
    2019
  • Performing Organization:
    University of Michigan, Ann Arbor
  • Peer Reviewed:
    True
  • Start Date:
    20050701
  • Source Full Name:
    Annals of Allergy, Asthma and Immunology
  • End Date:
    20280630
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:b83e165a141271e5cfbdd8477062c881ba2bc1e5a8b17f70725769bd47c5f450e09985e5ceac7560e3c4c076ecbfee9ac0b27d826ec519a81d65c668c0ab789d
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  • File Type:
    Filetype[PDF - 734.86 KB ]
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