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Free-Living Aquatic Turtles as Sentinels of spp. for Water Bodies. | LitMetric

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Article Abstract

Reptile-associated human salmonellosis cases have increased recently in the United States. It is not uncommon to find healthy chelonians shedding . The rate and frequency of bacterial shedding are not fully understood, and most studies have focused on captive vs. free-living chelonians and often in relation to an outbreak. Their ecology and significance as sentinels are important to understanding transmission. In 2012-2013, prevalence was determined for free-living aquatic turtles in man-made ponds in Clarke and Oconee Counties, in northern Georgia (USA) and the correlation between species, basking ecology, demographics (age/sex), season, or landcover with prevalence was assessed. The genetic relatedness between turtle and archived, human isolates, as well as, other archived animal and water isolates reported from this study area was examined. was isolated from 45 of 194 turtles (23.2%, range 14-100%) across six species. Prevalence was higher in juveniles (36%) than adults (20%), higher in females (33%) than males (18%), and higher in bottom-dwelling species (31%; common and loggerhead musk turtles, common snapping turtles) than basking species (15%; sliders, painted turtles). prevalence decreased as forest cover, canopy cover, and distance from roads increased. Prevalence was also higher in low-density, residential areas that have 20-49% impervious surface. A total of 9 different serovars of two subspecies were isolated including 3 subsp. and 44 subsp. (two turtles had two serotypes isolated from each). Among the serovars, Montevideo ( = 13) and Rubislaw ( = 11) were predominant. serovars Muenchen, Newport, Mississippi, Inverness, Brazil, and Paratyphi B. var L(+) tartrate positive (Java) were also isolated. Importantly, 85% of the turtle isolates matched pulsed-field gel electrophoresis patterns of human isolates, including those reported from Georgia. Collectively, these results suggest that turtles accumulate present in water bodies, and they may be effective sentinels of environmental contamination. Ultimately, the prevalence rates in wild aquatic turtles, especially those strains shared with humans, highlight a significant public health concern.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8339271PMC
http://dx.doi.org/10.3389/fvets.2021.674973DOI Listing

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