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Quantifying Circulating IgY Antibody Responses against Select Opportunistic Bacterial Pathogens and Correlations with Body Condition Factors in Wild American Alligators, . | LitMetric

AI Article Synopsis

  • The study investigates the immune responses of wild American alligators in Florida and South Carolina to various bacterial infections by analyzing serum samples collected over several years.
  • Researchers developed a specific antibody to measure immune responses and found that antibody levels varied seasonally, with significant differences observed from January to March compared to late spring through fall.
  • Additionally, the research revealed a correlation between the alligators' body-mass-index (BMI) and their antibody levels, contributing valuable insights into the disease ecology of these reptiles in both wild and controlled environments.

Article Abstract

Little is known about the disease ecology of American alligators (), and especially how they respond immunologically to emerging infectious diseases and zoonotic pathogens. In this study, we examined serum samples collected from wild alligators in Florida (2010-2011) and South Carolina (2011-2012, 2014-2017) for antibody responses to multiple bacteria. Immunoglobulin Y (IgY) was purified from serum to generate a mouse monoclonal antibody (mAb AMY-9) specific to the IgY heavy chain. An indirect ELISA was then developed for quantifying antibody responses against whole cell , , and . In Florida samples the primary differences in antibody levels were between January-March and late spring through summer and early fall (May-October), most likely reflecting seasonal influences in immune responses. Of note, differences over the months in antibody responses were confined to , , , and . Robust antibody responses in SC samples were observed in 2011, 2014, and 2015 against each bacterium except . All antibody responses were low in 2016 and 2017. Some of the highest antibody responses were against , , and One SC alligator estimated to be 70+ years old exhibited the highest measured antibody response against and By combining data from both sites, we show a clear correlation between body-mass-indices (BMI) and antibody titers in all six of the bacteria examined. Our study provides a critical antibody reagent and a proof-of-concept approach for studying the disease ecology of alligators in both the wild and in captivity.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8869730PMC
http://dx.doi.org/10.3390/biology11020269DOI Listing

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