MiDOG Animal Diagnostics is proud to share a newly published study in the American Journal of Veterinary Research examining oral microbiota changes in bearded dragons (Pogona vitticeps) diagnosed with dental disease.
This research represents a collaboration between MiDOG Animal Diagnostics and the School of Veterinary Medicine, University of Wisconsin–Madison (Madison, WI), combining advanced next-generation sequencing (NGS) technology with academic clinical expertise to deepen our understanding of reptile oral pathology.
Authors:
Ivana Levy, DVM
Christoph Mans, Dr med vet, MBA, DACZM
Kaylie Zapanta, PhD
Janina Krumbeck, PhD
Study Overview
Oral disease is a common and often undercharacterized condition in captive reptiles. Historically, diagnoses have focused on mechanical trauma, husbandry deficiencies, or individual opportunistic pathogens. However, this study evaluated whether broader microbial community dynamics may play a role.
Using next-generation sequencing, 16S rRNA gene sequencing for bacterial profiling and ITS2 sequencing for fungal identification, researchers analyzed oral samples from 42 client-owned bearded dragons. Microbial communities from clinically healthy individuals were compared to those with moderate to severe dental disease.
Unlike culture-based diagnostics, sequencing allowed for comprehensive, culture-independent detection of both bacterial and fungal organisms and assessment of their relative abundance within the oral ecosystem.
Key Findings
1. Dysbiosis Rather Than a Single Causative Agent
While overall microbial richness (α-diversity) did not differ significantly, community composition (β-diversity) was distinctly altered in dragons with dental disease.
This finding supports a dysbiosis-driven model, where shifts in microbial balance, rather than the presence of a single pathogen, contribute to disease progression.
2. Organisms Enriched in Diseased Animals
Dragons with dental pathology showed increased relative abundance of:
-
Pseudomonas aeruginosa
-
Devriesea agamarum
-
Serratia marcescens
-
Aspergillus spp.
Several of these organisms are recognized opportunists in reptiles and other species, suggesting that disease may reflect ecological imbalance and overgrowth rather than primary infection alone.
3. The Impact of Diet
Fruit consumption was associated with significant alterations in oral microbiota composition and greater microbial abundance.
Given that dietary sugars can influence microbial proliferation and biofilm formation, this finding reinforces the importance of species-appropriate nutrition and careful dietary counseling in captive reptile management.
Why This Matters for Clinical Practice
Chronic stomatitis and periodontal disease in reptiles are often multifactorial. Husbandry, nutrition, immune function, and microbial ecology interact in complex ways.
This study demonstrates that:
-
Reptile oral disease may be rooted in microbial community imbalance
-
Both bacteria and fungi contribute to the oral ecosystem
-
Diet can measurably influence microbial structure
-
Culture-independent sequencing provides a broader and more accurate microbial snapshot
For clinicians managing recurrent or treatment-resistant cases, deeper microbial profiling can offer valuable context that traditional culture alone may not reveal.
Advancing Evidence-Based Exotic Diagnostics
This collaboration between MiDOG Animal Diagnostics and the University of Nebraska–Lincoln reflects a shared commitment to advancing evidence-based diagnostics in exotic animal medicine.
By integrating high-resolution microbial sequencing with academic research, we continue to expand the scientific foundation for managing complex, multifactorial diseases in reptiles and other non-traditional species.
To learn more about microbial profiling services for reptiles, zoological collections, and exotic species, contact our team or explore our diagnostic offerings.