Livestock and Poultry Density and Childhood Cancer Incidence in Nine States in the USA

Details

• Alternative Title:
  Environ Res
• Personal Author:
  Booth, Benjamin J. ; Jones, Rena R. ; Turyk, Mary E. ; Freels, Sally ; Patel, Deven M. ; Stayner, Leslie T. ; Ward, Mary H.
• Description:
  Background
  
  Parental occupational and childhood exposures to farm animals have been positively associated with childhood brain tumors, whereas associations with childhood leukemia are equivocal. The developing immune system may be influenced by allergen, virus, or other exposures from animal sources, which may contribute to childhood cancer incidence.
  
  Methods
  
  Incident cancers (acute lymphoblastic leukemia [ALL], acute myeloid leukemia [AML], central nervous system [CNS], peripheral nervous system [PNS]) for children aged 0–4 diagnosed between 2003 and 2008 were obtained from nine National Cancer Institute Surveillance, Epidemiology and End Results (SEER) registries and were linked to U.S. Census of Agriculture data from 2002 and 2007 by county of diagnosis. Animal densities (animal units [AU]/km2; one animal unit is 1,000 pounds of animal weight) were estimated for hogs, cattle, chickens (layers and broilers, separately), equine (horses, ponies, mules, burros, donkeys), goats, sheep, turkeys, and total animals. Animal density was examined in models as both continuous (AU per km2) and categorical variables (quartiles). Animal operation densities (per km2) by size of operation (cattle, hogs, chickens, sheep) were modeled continuously. Rate ratios and 95% confidence intervals were estimated using Poisson regression.
  
  Results
  
  We found positive associations between AML and broiler chicken densities (RRper 10 AU/km2=1.14, 95% CI=1.02–1.26). ALL rates increased with densities of hog operations (RRper operation/100 km2=1.06, 95% CI=1.02–1.11). PNS cancer rates were inversely associated with layer chicken density (RRper log of AU/km2=0.94, 95% CI=0.89–0.99). No association was found between any cancer type and densities of cattle, equine, or goats.
  
  Conclusions
  
  Although limited by the ecologic study design, some of our findings are novel and should be examined in epidemiological studies with individual level data.
  
  
• Subjects:
  Agricultural Exposures Animals Article Central Nervous System Neoplasms Child, Preschool Childhood Cancer Environmental Epidemiology Farm Animals Female Humans Incidence Infant Infant, Newborn Leukemia, Myeloid, Acute Livestock Male Neoplasms Peripheral Nervous System Neoplasms Population Density Poultry Precursor Cell Lymphoblastic Leukemia-Lymphoma Residence Characteristics United States

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• Source:
  Environ Res. 159:444-451.
• Pubmed ID:
  28858758
• Pubmed Central ID:
  PMC5784771
• Document Type:
  Journal Article
• Funding:
  T42 OH008672/OH/NIOSH CDC HHS/United States ; Z01 CP010125-12/NULL/Intramural NIH HHS/United States ; Z01 CP01012522/ImNIH/Intramural NIH HHS/United States
• Volume:
  159
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:d5882d348f95e017268161f6b4110d613c5c1bce401a3147622726890e2856df
• Download URL:
  https://stacks.cdc.gov/view/cdc/52015/cdc_52015_DS1.pdf
• File Type:
  [PDF - 380.27 KB ]