Journal
JOURNAL OF VETERINARY MEDICAL SCIENCE
Volume 82, Issue 8, Pages 1124-1129Publisher
JAPAN SOC VET SCI
DOI: 10.1292/jvms.20-0246
Keywords
blood status; Chroicocephalus ridibundus; immunosuppression; Japan; Lead accumulation
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Funding
- Sasakawa Scientific Research Grant from The Japan Science Society
- Environment Research and Technology Development Fund (SII-1) of the Environmental Restoration and Conservation Agency of Japan
- JST/JICA, SATREPS (Science and Technology Research Partnership for Sustainable Development) [JPMJSA1501]
- Program for supporting introduction of the new sharing system [JPMXS0420100619]
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Few studies have evaluated immunosuppression due to lead accumulation below the overt toxicity threshold. If low levels of lead accumulation cause immunosuppression in birds, those birds could become more susceptible to pathogens. We aimed to determine if low levels of lead accumulation lead to immunosuppression in Black-headed gulls (Chroicocephalus ridibundus). Gulls were captured in Tokyo-bay and Mikawa-bay from January to April 2019. Their blood samples were analyzed for eight items. The data were analyzed to evaluate the correlation between lead concentrations and the variables from each bay. Lead was positively correlated with the percentage of heterophils and heterophil and lymphocyte ratio and negatively with lymphocytes. Thus, low lead accumulation levels may induce changes in percentage of the heterophils and lymphocyte.
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