{"topic_id":"evidence_exotic_bearded_dragon_husbandry_health","category":"evidence","context":"---\ntopic_id: evidence_exotic_bearded_dragon_husbandry_health\ncategory: evidence\ntitle: \"Evidence cluster — Bearded dragon (Pogona vitticeps) husbandry, health & nutrition (peer-reviewed, Europe PMC)\"\nlang: en\nsource: \"Europe PMC (Europe PubMed Central) REST search, first-hand peer-reviewed abstracts, pulled 2026-08-01\"\nsource_file: pdf-raw/evidence/europepmc_bearded_dragon_husbandry_health_2026-08-01.txt\ndate_parsed: 2026-08-01\ntokens_estimated: 5010\nverification:\n method: substring_match\n claims: 12\n passed: 12\n date: 2026-08-01\nsource_document: \"Peer-reviewed Bearded dragon husbandry/health/nutrition literature (Europe PMC, first-hand abstracts)\"\ncitation:\n authority: \"Europe PMC\"\n title: \"Evidence cluster — Bearded dragon (Pogona vitticeps) husbandry, health & nutrition (peer-reviewed, Europe PMC)\"\n url: \"https://www.ebi.ac.uk/europepmc/\"\n retrieved: \"2026-08-01\"\n doc_type: \"first-hand abstracts (Europe PMC REST)\"\n needs_review: false\n---\n\n# Evidence: Bearded dragon (Pogona vitticeps) husbandry, health & nutrition\n\nSource: Europe PMC (Europe PubMed Central) REST search — first-hand peer-reviewed abstract records, pulled 2026-08-01.\nQueries covered husbandry, health/disease/parasitology, and nutrition/feeding for Pogona vitticeps.\nThe cluster returns **12** representative studies with abstracts below. Abstract text is verbatim from source; each study is traceable by PMID.\n\n## Studies\n- **PMID 41633051 (2026, American journal of veterinary research)** — Dental disease and diet are associated with changes in the microbiota of the oral cavity in bearded dragons (Pogona vitticeps).. Abstract (opening): Objective
To describe the oral microbiota in bearded dragons (Pogona vitticeps) with or without dental disease and evaluate the impact of fruit consumption.Methods
42 total client-owned bearded dragons were categorized into groups: healthy (absent or mild dental disease [n = 21]) and diseased (moderate to severe dental disease [21]). An additional analysis compared fruit-eating (n = 17) and non-fruit-eating bearded dragons (25). Following dentition assessment, all oral quadrants were sampled at 1 time point for DNA extraction via next-generation sequencing targeting bacterial 16S rRNA and fungal internal transcribed spacer 2 regions. The α- and β-diversity, taxonomic abundance, core microbiota analysis, and linear discriminant effect size analyses were compared between groups.Results
The oral microbiota comprised 1,317 and 163 fungal species. Although there were no significant differences in bacterial or fungal α-diversity between healthy and diseased groups, bacterial β-diversity differed significantly. Certain taxa were more abundant in the dental disease group, including Pseudomonas aeruginosa, Devriesea agamarum, Serratia marcescens, and the Aspergillus genus. Additionally, the microbiota of bearded dragons that consumed fruit was significantly altered.Conclusions
There were distinct organisms in the oral microbiota attributed to dental disease, with specific organisms more abundant in diseased individuals, suggesting an association with disease. Bearded dragons fed fruit had more abundant microbial species, indicating fruit consumption may promote oral microbial overgrowth.Clinical relevance
Both differences in the oral microbiota and increased prevalence of specific species associated with dental health status and diet should be considered when making husbandry and therapeutic decisions for bearded dragons.\n Source: https://pubmed.ncbi.nlm.nih.gov/41633051/\n- **PMID 41594463 (2026, Animals : an open access journal from MDPI)** — Detection of Viable Nannizziopsis guarroi in Housing Environments Prior to Dermatological Lesion Development in Bearded Dragons (Pogona vitticeps).. Abstract (opening): Nannizziopsis guarroi causes dermatomycosis in lizards and snakes. Little is known about the environment's role in transmission of the fungus. The environments of bearded dragons experimentally inoculated with N. guarroi were cultured weekly to assess the presence of viable N. guarroi. Four of six (4/6, 66.67%) enclosures demonstrated an environmental presence of N. guarroi prior to the observation of clinical lesions in the bearded dragon housed there. The environments were positive for N. guarroi growth 7-28 days prior to lesion development. The environment should be considered as a potential site of infection for naïve reptile hosts and environmental seeding may occur prior to the development of clinical nannizziomycosis in exposed lizards.\n Source: https://pubmed.ncbi.nlm.nih.gov/41594463/\n- **PMID 40958376 (2026, Veterinary ophthalmology)** — An Ocular Manifestation of a Systemic Disease With Encephalitozoon Pogonae in a Juvenile Central Bearded Dragon (Pogona vitticeps).. Abstract (opening): Objective
Encephalitozoon pogonae, a recently identified microsporidian species, has been associated with systemic infections in Central bearded dragons (Pogona vitticeps) manifesting as granulomatous inflammation and vasculitis. Despite the species similarity to Encephalitozoon cuniculi, which causes ocular, neurologic, and renal pathology in rabbits, ocular manifestations of E. pogonae in bearded dragons are underreported. This case report aims to explore the ocular manifestations of E. pogonae in a clinical case and highlight the challenges in diagnosis and treatment of microsporidial infections in reptiles.Animal studied
A 6-month-old male central bearded dragon with initial presentation of unilateral blepharoconjunctivitis.Procedures
The patient was treated with topical ofloxacin 0.3% ophthalmic solution, systemic nonsteroidal anti-inflammatories (meloxicam), and antimicrobials (ceftazidime). Diagnostic efforts included physical and ophthalmic examination, ocular high-frequency ultrasound (48 mHz transducer), cytological examination of conjunctiva, and histopathological examination with PCR analysis confirming E. pogonae in both liver and conjunctiva.Results
Despite treatment, the patient died from hemopericardium. Necropsy demonstrated severe granulomatous inflammation in multiple organs, including the liver, intestines, and ocular structures (conjunctiva and uveal tissue), as well as hypermature cataracts and phacoclastic uveitis, consistent with systemic microsporidiosis.Conclusions
This case highlights the potential for an ocular manifestation of a systemic disease caused by E. pogonae, underscoring the importance of considering microsporidial infections in the differential diagnosis of refractory ocular disease in reptiles. The findings also emphasize the challenges in diagnosing and treating these infections.\n Source: https://pubmed.ncbi.nlm.nih.gov/40958376/\n- **PMID 41749246 (2026, BMC veterinary research)** — First report of an iridophoroma in a Tegu (Salvator merianae).. Abstract (opening): Background
This case report describes the clinical and histological findings of a rare periocular iridophoroma in a tegu.Case presentation
Iridophoroma is a rare type of chromatophoroma, a tumor that arises from iridophores, specialized pigment cells responsible for reflecting light. This case report describes a 6-year-old male Argentine black and white tegu (Salvator merianae) presented with a large, irregular, proliferative mass in the periocular region. The mass originated from the upper left eyelid, partially covering the ocular surface, and measured 2.5 cm in diameter. The patient was referred to the department of Surgery and Intensive care for mass removal and underwent two separate surgical resections. Fine needle aspiration from the structure revealed the diagnosis of iridophoroma, which was later confirmed through histology. This case aims to broaden current knowledge in reptile medicine by presenting an iridophoroma in Salvator merianae, highlighting its clinical presentation, cytological features, and histopathological aspects.Conclusions
This case represents the first documented occurrence of an iridophoroma in a tegu, highlighting the need for increased awareness and precision in diagnosing tumors in reptiles. The findings demonsrate the importance of paraclinical investigations, such as histopathology, not only in confirming rare conditions but also in differentiating iridophoromas from other potential diagnoses, such as squamous cell carcinoma, papilloma, or melanophoroma. Accurate identification is crucial for guiding appropriate treatment and improving outcomes in reptile medicine.\n Source: https://pubmed.ncbi.nlm.nih.gov/41749246/\n- **PMID 42198584 (2026, Pathogens (Basel, Switzerland))** — Pathological, Immunohistochemical, and Bacteriological Characterization of Salmonellosis in Bearded Dragons (<i>Pogona vitticeps</i>).. Abstract (opening): Salmonella spp. is a major zoonotic pathogen. Although reptiles are mostly considered subclinical carriers, clinical disease may develop following immunosuppression. Clinical salmonellosis in reptiles has been extensively reported; however, the condition has been rarely described in bearded dragons (Pogona vitticeps). We retrospectively analyzed six cases of salmonellosis in bearded dragons and characterized the pathological, immunohistochemical, and bacteriological findings. Clinical signs and gross findings were mostly non-specific. Histological findings mainly consisted of fibrinonecrotizing enterocolitis (83.3%); necrotizing or granulomatous hepatitis (66.7%); pneumonia including bronchopneumonia or interstitial pneumonia in one case each (33.3%); tubulointerstitial nephritis with tubular necrosis (16.7%); and coelomitis (16.7%). Salmonella enterica subsp. houtenae was cultured in three cases (33.3%), whereas S. enterica subsp. enterica serovar Rissen, S. enterica subsp. enterica serovar Cotham, and S. enterica subsp. diarizonae were cultured in one case each. Intralesional bacteria were detected via immunohistochemistry in kidneys and colon in two cases (33.3%). The predominance of lesions in the intestines and liver likely reflects initial intestinal colonization followed by hematogenous dissemination to the liver. Hepatic lesions are thought to represent different stages along a continuum, progressing from acute necrosis to discrete granuloma formation. Renal and respiratory involvement was infrequent, as reported in other reptile species. Some of the isolated Salmonella subspecies (S. diarizonae and S. houtenae) are well-recognized causes of clinical disease in other reptile species but not previously identified in bearded dragons. This study provides a comprehensive pathological, immunohistochemical, and bacteriological characterization of salmonellosis in bearded dragons, thus raising awareness and assisting in the identification of this condition.\n Source: https://pubmed.ncbi.nlm.nih.gov/42198584/\n- **PMID 41940386 (2026, PeerJ)** — Changes in housing and diet combined increase fecal oxyurid load in captive tokay geckos.. Abstract (opening): Reptiles are increasingly popular as exotic pets and can suffer high mortality risks in captivity, yet research into their welfare remains limited. Commonly occurring practices such as frequent handling, changes in housing and diet could induce stress and increase parasite loads with potentially severe negative welfare outcomes. Therefore, it is crucial to understand how routine procedures may influence parasite infections. In this study, we exposed captive bred tokay geckos (Gekko gecko) to two stressors common in the reptile trade, cohabitation with a novel conspecific and a change in diet. We tested the effect of a diet and housing change on oxyurid egg shedding intensity in isolation as well as the combined effect of both treatments. We found that a change in diet or housing alone had no effect on fecal parasite load while both a change in diet and housing combined did increase parasite load. However, we did not notice a visible change in the lizards' body condition, food and water uptake or defecation within the short study period. Our study shows that common changes in housing and husbandry can increase parasite load in tokay geckos. Further studies are needed to determine which other procedures (e.g., confinement, transport, novel environments) affect health and when combined could severely impact reptile health.\n Source: https://pubmed.ncbi.nlm.nih.gov/41940386/\n- **PMID 42409827 (2026, Nature communications)** — Conserved and lineage-specific mechanisms drive chromatophore differentiation in reptiles.. Abstract (opening): The mechanisms by which novel differentiation pathways evolve to produce new cell types are still not fully understood. Chromatophores, the pigmented cells in the skin, offer an ideal paradigm because each type independently develops from neural crest cells to produce a distinct colour using well-characterised biosynthetic pathways. Here we show, using single-cell gene expression analyses, that canonical chromatophores develop in the embryonic skin of corn snakes and bearded dragon lizards. Yet, we identify previously undescribed chromatophore subtypes in the bearded dragon. These populations co-express progenitor and mature markers and possibly contribute to embryonic skin patterning, as revealed by whole-mount in situ hybridisation. Comparative analyses uncover that while mature chromatophores show cross-species similarity reflecting shared pigmentary function, progenitor states differ in transcription factor usage, including species-specific deployment of MITF, PAX7, and TFEC. Integration with teleost and amphibian datasets confirms that diversification of pigmentation arises through distinct progenitor trajectories converging on similar mature states.\n Source: https://pubmed.ncbi.nlm.nih.gov/42409827/\n- **PMID 42017649 (2026, Australian veterinary journal)** — Cholangiocarcinoma in a central bearded dragon (Pogona vitticeps): A case report.. Abstract (opening): Cholangiocarcinoma is an uncommon malignant epithelial tumour of the biliary tract in reptiles and is rarely reported in central bearded dragons (Pogona vitticeps). This case report describes a 7-year-old male central bearded dragon in which a nonspecific coelomic opacity was incidentally detected during a routine clinical examination. Diagnostic imaging, including radiography and ultrasonography, identified a cystic lesion arising from the liver. Blood biochemistry revealed a mild elevation in alanine transaminase and borderline blood urea nitrogen, with no other significant abnormalities. Surgical excision of the mass was performed via a right lateral paracostal coeliotomy. Histopathological examination confirmed a diagnosis of cholangiocarcinoma, supported by immunohistochemical positivity for pankeratin and absence of vimentin and α-smooth muscle actin expression. No evidence of metastatic disease was observed at surgery or during follow-up. The animal recovered uneventfully and remained clinically well with no evidence of recurrence 10 months postoperatively. This case highlights the importance of diagnostic imaging and histopathology in the evaluation of hepatic masses in reptiles and demonstrates that early surgical intervention can result in a favourable long-term outcome.\n Source: https://pubmed.ncbi.nlm.nih.gov/42017649/\n- **PMID 42345833 (2026, Biology)** — Gonadogenesis in the Bearded Dragon (<i>Pogona vitticeps</i>, Agamidae): A Comprehensive Histological Analysis from Gonadal Ridge Formation to Testicular and Ovarian Development.. Abstract (opening): The bearded dragon (Pogona vitticeps) is the most commonly kept pet lizard and a promising model organism for studies of sex determination and gonadal development. Despite its potential, the morphological basis of gonadogenesis in this species remains poorly characterized. Here, we provide a comprehensive histological characterization of gonad development in P. vitticeps using serial paraffin and semi-thin sections, supplemented by morphometric analyses. Gonadal ridges first appeared at stage S28 as bilateral thickenings of the coelomic epithelium, coinciding with primordial germ cell colonization; by S28/29, a recognizable cortex and medulla were already present. The first morphological differences between male and female gonads appeared at S29/30. In differentiating testes, well-defined testis cords with a central lumen formed rapidly, while the cortex became thin and retained only scattered germ cells. Testicular development was characterized by rapid lumen formation within the testis cords, resulting in their early transformation into seminiferous tubules, followed by elongation and coiling of the tubules, maintenance of a stable tubule diameter, and a transient mitotic arrest of germ cells, with proliferation resuming at stage S36. In differentiating ovaries, the cortex remained thick and multilayered, with a progressive increase in germ cell number reflecting active oogonial proliferation. The ovarian medulla expanded substantially, and from S36 onward, lacunae developed within the medullary cords. No meiotic cells were observed at any examined stage. These results provide an essential morphological framework for future molecular and experimental studies of sex determination and gonadal differentiation in this species and in squamates more broadly.\n Source: https://pubmed.ncbi.nlm.nih.gov/42345833/\n- **PMID 41317138 (2026, Veterinary medicine and science)** — Detection of Cryptosporidium and Giardia duodenalis in Reptiles in Thailand.. Abstract (opening): Cryptosporidium spp. and Giardia duodenalis are significant intestinal protozoan parasites affecting humans and animals worldwide. These infections are transmitted through the faecal-oral route, by contaminated water, food or close contact with infected hosts. The zoonotic risk of transmission from reptiles is considered low; yet, limited research exists regarding Cryptosporidium and Giardia infections in these animals. This study investigated the presence of Cryptosporidium spp. and G. duodenalis in reptile faecal samples from a breeding farm in the Chonburi Province, Eastern Thailand. The test population included 363 iguanas, 50 tortoises, 79 bearded dragons and nine snakes. DNA extraction from faecal samples was performed, followed by nested PCR for Cryptosporidium and G. duodenalis, and all positive samples were sequenced for molecular characterisation. Cryptosporidium and G. duodenalis were detected in 13 and 25 out of 501 faecal samples, respectively. Specifically, seven of 363 iguana samples and six of 79 bearded dragon samples tested positive for Cryptosporidium. Cryptosporidium avium was found in 11 samples, and one sample revealed Cryptosporidium serpentis; the remaining sample could not be identified at the species level. For G. duodenalis, 15 of 363 iguanas tested positive, along with six of 79 bearded dragons, two of 50 tortoises and two of nine snakes. Only G. duodenalis assemblage B was identified in positive samples. This study provides epidemiological information on the infection rate and distribution of species of Cryptosporidium and Giardia in a breeding reptile farm in Chonburi Province, Eastern Thailand, and the findings are discussed in the context of the scientific literature. SUMMARY: This study represents one of the largest surveys on Cryptosporidium and Giardia duodenalis in reptiles. Cryptosporidium avium, typically associated with avian hosts, was the predominant Cryptosporidium species identified in iguanas and bearded dragons. Giardia duodenalis assemblage B, known for its zoonotic potential, was the primary assemblage found in iguanas.\n Source: https://pubmed.ncbi.nlm.nih.gov/41317138/\n- **PMID 41795280 (2026, Veterinary anaesthesia and analgesia)** — Antinociceptive effects of subcutaneous hydromorphone in bearded dragons (Pogona vitticeps).. Abstract (opening): Objective
To investigate the efficacy of subcutaneous hydromorphone in bearded dragons by evaluating changes in thermal quantitative sensory testing.Study design
Randomized, blinded, crossover experimental study.Animals
A group of six client-owned, healthy adult bearded dragons.Methods
Thermal threshold (TT) testing was conducted using a ramped stimulus (2 °C second-1) applied to the medial thigh until a response (leg kick, escape, attention to device) was observed or a maximum cut-off temperature (60 °C) was reached. Cold thermal latency (CTL) was tested by applying a 0 °C probe on the medial thigh until a behavioral response (same as TT) was elicited or the cut-off time (60 seconds) was reached. For baseline, both tests were repeated three times with a 20 minute rest interval between each test. Later, a randomized subcutaneous injection of hydromorphone (0.5 mg kg-1) or equal volume of saline was given in the dorsal axillary region. TT and CTL were determined at 0, 2, 4, 8, 12, and 24 hours after injection by a single blinded evaluator. The procedure was repeated 4 weeks later with the alternative treatment. Data were analyzed using mixed-effect models on ranks. Repeatability and test-retest reliability were measured using the coefficient of variation (CV) and Spearman's ⍴. Significance was set at p ≤ 0.05.Results
Hydromorphone significantly increased TT compared with placebo at all time points (p ≤ 0.002) with good repeatability (CV 28.5%). The highest median (interquartile range) TT of 60 (60-60) °C was recorded 2 and 4 hours after injection. CTL time was longer overall after hydromorphone injection (p < 0.001), regardless of time (p = 0.257). TT and CTL showed low test-retest reliability (⍴ = 0.21 and 0.38, respectively). No skin damage was observed.Conclusions and clinical relevance
Hydromorphone (0.05 mg kg-1, subcutaneously) provides antinociception in bearded dragons for 24 hours.\n Source: https://pubmed.ncbi.nlm.nih.gov/41795280/\n- **PMID 41632107 (2026, Acta veterinaria Hungarica)** — Effect of different dietary supplements on the growth and blood parameters of bearded dragons (Pogona vitticeps).. Abstract (opening): Metabolic bone disease of nutritional origin (Ca/vitamin D3 deficiency) is common in pet reptiles. This study aimed to investigate the effects of four dietary supplements with or without artificial UVB irradiation. Selected blood parameters, health and growth were also examined. Thirty-six, one-month-old bearded dragons (Pogona vitticeps) were housed individually and fed five times a week; dietary supplements were given daily. Blood samples were taken from 3 animals in each group (n = 18) seven times, once at 7, 9, 11, 13 and 15, and twice at 16 months of age (with 2 weeks difference). Measured parameters were Ca (2.6 ± 0.5 mmol*L-1), Ca2+ (1.2 ± 0.2 mmol*L-1), uric acid (358 ± 243 µmol*L-1), total protein (66.2 ± 14.9 g*L-1), alanine-aminotransferase (<1-83 U*L-1), Na+ (161 ± 8.0 mmol*L-1) and K+ (3.9 ± 1.1 mmol*L-1). The UVB exposure enhances both the Ca (P = 0.0489) and Ca2+ (P = 0.0222) levels. The 24-h fasting before sampling resulted in significantly (P < 0.0001) lower uric acid values. The effect of age seems clinically relevant in total protein, with lower levels in juveniles (P = 0.0016). Treatments did not affect the animals' body weight and length; all of them were clinically healthy.\n Source: https://pubmed.ncbi.nlm.nih.gov/41632107/\n\nSource text: `pdf-raw/evidence/europepmc_bearded_dragon_husbandry_health_2026-08-01.txt` (Europe PMC first-hand abstracts, pulled 2026-08-01).\n","sources":["Europe PMC — Evidence cluster — Bearded dragon (Pogona vitticeps) husbandry, health & nutrition (peer-reviewed, Europe PMC) (retrieved 2026-08-01)"],"source":{"authority":"Europe PMC","title":"Evidence cluster — Bearded dragon (Pogona vitticeps) husbandry, health & nutrition (peer-reviewed, Europe PMC)","url":"https://pubmed.ncbi.nlm.nih.gov/41633051/","retrieved":"2026-08-01","ref":"PMID 41633051","doc_type":"official PDF","source_document":"Peer-reviewed Bearded dragon husbandry/health/nutrition literature (Europe PMC, first-hand abstracts)","verification_file":"pdf-raw/evidence/europepmc_bearded_dragon_husbandry_health_2026-08-01.txt"},"source_document":"Peer-reviewed Bearded dragon husbandry/health/nutrition literature (Europe PMC, first-hand abstracts)","source_file":"pdf-raw/evidence/europepmc_bearded_dragon_husbandry_health_2026-08-01.txt","tokens_estimated":600,"generated_at":null,"tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}