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HOME/Research and Discoveries/Infants Exposed to Specific Molds Have Higher Asthma Risk

Infants Exposed to Specific Molds Have Higher Asthma Risk

 

August 16, 2012
Blog Editorial Team
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The following article recently appeared in UC Health News. It has been edited for this format.

Cincinnati-based researchers have found that exposure to three types of mold during infancy may have a direct link to asthma development during childhood.

These forms of mold—Aspergillus ochraceus, Aspergillus unguis and Penicillium variable—are typically found growing in water-damaged homes, putting a spotlight on the importance of mold remediation for public health.

Lead author Tiina Reponen, PhD, and colleagues report these findings in the August 2012 issue of the Journal of Allergy and Clinical Immunology, the official scientific publication of the American Academy of Allergy, Asthma and Immunology.

In a long-term population study of nearly 300 infants, researchers from the University of Cincinnati (UC), U.S. Environmental Protection Agency (EPA) and Cincinnati Children’s Hospital Medical Center assessed allergy development and the respiratory health of children annually up until age four, then again at age 7—an early age for objective diagnosis of asthma in children. The team also monitored home allergens and mold. All infants enrolled in the study were born to at least one parent with allergies.

They found that 25 percent of children whose parents had allergies were asthmatic by age 7. Among the multiple indoor contaminants assessed, only mold exposure during infancy emerged as a risk factor for developing asthma at age 7.

“Previous scientific studies have linked mold to worsening asthma symptoms, but the relevant mold species and their concentrations were unknown, making it difficult for public health officials to develop tools to effectively address the underlying source of the problem,” explains Reponen, a professor in the UC College of Medicine’s environmental health department.

The UC-based team used a DNA-based mold level analysis tool, to determine that exposure to Aspergillus ochraceus, Aspergillus unguis and Penicillium variabile was linked to asthma development in the high-risk study population.

“This is strong evidence that indoor mold contributed to asthma development. This stresses the urgent need for remediating water damage in homes, says Reponen. Asthma treatments may be more efficient if targeted toward specific mold species.

Co-authors of the study—which was partially funded by the U.S. Department of Housing and Urban Development and National Institute of Environmental Health Sciences—include UC environmental faculty members James Lockey, MD, David Bernstein, MD, Linda Levin, PhD, Sergey Grinshpun, PhD, Manuel Villareal, MD, Shu Zheng, PhD, and Grace LeMasters, PhD, principal investigator of CCAAPS. Stephen Vesper, PhD, of the EPA, and Gurjit Khurana Hershey, MD, PhD, Patrick Ryan, PhD, of Cincinnati Children’s Hospital Medical Center, also contributed to this study.

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TAGS:
  • allergy and immunology
  • asthma

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