Evidence: Reptile (reptile) toxicology
Source: Europe PMC (Europe PubMed Central) REST search — first-hand peer-reviewed abstract records, pulled 2026-08-01. Queries covered toxicology, poisoning, intoxication, heavy metals, mycotoxins and (for relevant taxa) envenomation for reptile. The cluster returns 8 representative studies with abstracts below. Abstract text is verbatim from source; each study is traceable by PMID.
Studies
- PMID 42041919 (2026, Biology) — Herping the African Continent: Alien Amphibians and Reptiles in Sub-Saharan Africa.. Abstract (opening): Introduction of species represents today one of the most important problems of nature conservation. Special attention is paid to alien vascular plants and vertebrates. In the Afrotropical Region (sub-Saharan Africa), however, there is a lack of comprehensive review of alien amphibians and reptiles. The presented paper constitutes an attempt to overview the status, distribution and threats posed by introduced herp species to sub-Saharan Africa since the second half of the 18th century. This review includes 21 amphibian (including 10 established) and 57 reptile (including 33 established) species introduced to sub-Saharan Africa. Most species introduced to sub-Saharan Africa which subsequently developed viable populations originated from the Malagasy (32%), Afrotropical (30%), and Oriental (27%) Regions. Most introductions were made in the last two decades, mostly as results of an increase in international trade and herp pet industry, especially in South Africa. Stowaway and pet trade are the most common pathways of introductions. Several factors determine the successful establishment of introduced alien herp species in sub-Saharan Africa, viz. behavioral and morphological traits, propagule pressure, climate and habitat overlap, and presence of potentially competing species. The impact of alien herps in sub-Saharan Africa on the local biodiversity is not well investigated. In comparison with other continents the number of introduced and established herp species in sub-Saharan Africa is relatively low. The Malagasy Region has the highest number of introduced herp species in sub-Saharan Africa. *[CC BY — Open Access, verbatim with attribution.]*
Source: https://pubmed.ncbi.nlm.nih.gov/42041919/
- PMID 42146017 (2026, Frontiers in physiology) — Physiological responses and adaptive mechanisms of amphibians and reptiles to multiple interacting environmental stressors: an integrative review.. Abstract (opening): This integrative review synthesizes current knowledge on the physiological responses and adaptive mechanisms of amphibians and reptiles to multiple interacting environmental stressors, with particular emphasis on synergistic effects among temperature, hydric stress, disease, and pollution. Given the stronger empirical basis for amphibians in the existing literature, amphibian responses are covered in greater depth, while reptile-specific physiology, immunology, and emerging infectious diseases are explicitly addressed in dedicated sections throughout the review. Critical thermal tolerance analyses reveal that approximately 7.5% of amphibian species will exceed their physiological limits under a 4 °C warming scenario, with tropical lowland species already operating near their CTmax thresholds. Thermal plasticity is limited, with acclimation responses averaging only 0.13 °C increase in CTmax per 1 °C environmental warming-insufficient to track rapid climate change. Water balance regulation shows dramatic interspecific variation, with cutaneous resistance ranging from 0.05 s/cm in aquatic amphibians to >1000 s/cm in desert-adapted reptiles. Synergistic interactions between thermal and hydric stress significantly amplify vulnerability, particularly in dehydration scenarios that reduce critical thermal limits. Chemical pollutants, including heavy metals and pesticides, cause developmental abnormalities (535% increase in malformation frequency), immunosuppression, and endocrine disruption across multiple life stages. Emerging infectious diseases, particularly chytridiomycosis (<i>Batrachochytrium dendrobatidis</i> and <i>B. salamandrivorans</i>) and ranaviruses, drive mass mortality events globally, with co-infections exacerbating population declines. Climate change intensifies disease susceptibility through stress-mediated immunosuppression and altered pathogen dynamics. Adaptive capacity varies markedly among species. While amphibians exhibit strong phenological responses (2-4× greater than other taxa), genetic adaptation potential remains limited by narrow dispersal abilities and habitat fragmentation. Microhabitat buffering can reduce thermal extremes by several degrees but depends critically on habitat structural integrity. This review demonstrates that the pace of anthropogenic change challenges the adaptive capacity of most species, necessitating integrated conservation strategies including microhabitat preservation, climate corridor establishment, pollution mitigation, disease surveillance, and <i>ex-situ</i> conservation programs. *[CC BY — Open Access, verbatim with attribution.]*
Source: https://pubmed.ncbi.nlm.nih.gov/42146017/
- PMID 42347420 (2026, Toxics) — *[Paraphrased derived summary — non-Open-Access source.]* This synthesis of microplastic exposure across five continents finds field detection in amphibian larvae ranging from 26% in conservatively screened Central European populations to 73-80% in high-anthropogenic Anatolian tadpoles, with PET, PE, and PP fibres dominant. Mechanistic evidence links microplastics to oxidative stress, hypothalamic-pituitary-thyroid disruption, microbiome dysbiosis, and impaired antiviral/antifungal immunity (potentially amplifying Batrachochytrium dendrobatidis and ranavirus risk). Sea turtles show near-universal ingestion with maternal transfer to eggs, while freshwater turtles, terrestrial squamates, and crocodilians are understudied; the authors note taxonomic, geographic, and experimental biases in current evidence.
Source: https://pubmed.ncbi.nlm.nih.gov/42347420/
- PMID 42223730 (2026, Veterinary research communications) — *[Paraphrased derived summary — non-Open-Access source.]* During population monitoring in Komodo National Park (April 2025), an adult male Komodo dragon (Varanus komodoensis) was found with a shoulder wound infested by fly larvae, later identified as Chrysomya rufifacies with an estimated 2-3 day post-infestation interval; the wound was cleaned and treated. Baited traps caught 48 adult flies (54% C. rufifacies, 35% C. megacephala, 10% Sarcophaga sp.), indicating multiple opportunistic myiasis agents. This is the first documented traumatic myiasis in a wild Komodo dragon, underscoring a One Health approach to managing the species.
Source: https://pubmed.ncbi.nlm.nih.gov/42223730/
- PMID 41893567 (2026, Toxins) — Are Baby Rattlesnakes More Dangerous than Adults? Origin, Transmission, and Prevalence of a Media-Driven Myth, with Evidence of Effective Messaging to Dispel It.. Abstract (opening): The easily defanged myth that baby rattlesnakes (genera <i>Crotalus</i> and <i>Sistrurus</i>) are more dangerous than adults has persisted in North America despite all evidence to the contrary. The most often cited reason for the babies-more-dangerous (BMD) myth is the venom-dump (VD) hypothesis: babies, in contrast to adults, cannot control how much venom they expend, and therefore inject all of it when biting. We undertook three approaches to explore the origin, transmission, and prevalence of this myth and its most frequent explanation. First, we examined historical newspaper accounts. From 130 newspaper stories mentioning the relative danger of baby rattlesnakes, we identified a timeline in which (1) most stories prior to 1969 were factually correct; (2) the BMD myth and VD hypothesis likely originated in the mid-to-late 1960s and became entrenched in California, especially, from 1970 to 1999; (3) factually incorrect statements subsequently prevailed throughout North America from 2000 to 2014; and (4) factually correct stories regained prominence with apparent effective messaging success from 2015 onward. We further learned that general information stories about rattlesnakes, more often citing subject experts like university professors, were much more likely to provide accurate information than local snakebite stories, which more often cited health professionals (e.g., physicians, veterinarians, pharmacists) and emergency responders (e.g., police and fire officers) who frequently supplied misinformation. Second, we surveyed familiarity with the BMD myth and VD hypothesis among 53 university classrooms (including one high school) representing 3751 students across 29 states within the United States. Consistent with the California media's outsized influence on misinformation transmission, familiarity with the myth was greatest in the southwestern states (52.6%) and declined moving north and east, with the least familiarity in the northeastern states (16.4%). Third, a small survey of 75 emergency responders and health professionals from Southern California revealed that a whopping 73.3% actually believed the BMD myth. Numerous organizations generally regarded as authoritative further amplified the misinformation, especially on the internet, where some content persists to this day. Unfortunately, belief in the BMD myth and VD hypothesis can lead to negative consequences, including misinformed risk-taking by those encountering snakes, unwarranted fear among snakebite victims, and inappropriate care delivered by misinformed or patient/family-pressured medical professionals. Our findings target health professionals and emergency responders as priority audiences for education. *[CC BY — Open Access, verbatim with attribution.]*
Source: https://pubmed.ncbi.nlm.nih.gov/41893567/
- PMID 41954651 (2026, Archives of environmental contamination and toxicology) — *[Paraphrased derived summary — non-Open-Access source.]* Using roadkill as an opportunistic sentinel, researchers measured 30 PFAS in livers of three apex venomous snake species around Durban, South Africa - black mamba (n=28), eastern green mamba (n=5), and Mozambique spitting cobra (n=6). Nine PFAS were quantified, dominated by long-chain compounds plus the replacement chemical 6:2 Cl-PFESA; the highest summed burden was 1084 ng/g dry weight (median 511 ng/g in black mamba). The study illustrates roadkill sampling as a tool to track urban PFAS contamination in difficult-to-study species.
Source: https://pubmed.ncbi.nlm.nih.gov/41954651/
- PMID 42376688 (2026, Veterinary medicine and science) — *[Paraphrased derived summary — non-Open-Access source.]* A captive African rock python (Python sebae) at a private Nigerian zoo presented with heavy Amblyomma latum tick infestation, facial swelling, incomplete shedding, anorexia, lethargy, and intraerythrocytic Haemogregarina-like gamonts on blood smears. Treatment combined mechanical tick removal, oral ivermectin, and improved husbandry; the snake resumed feeding and normal shedding within five days and blood smears were clear post-treatment. The case highlights parasitic surveillance, rapid intervention, and rigorous husbandry for captive reptiles.
Source: https://pubmed.ncbi.nlm.nih.gov/42376688/
- PMID 41749246 (2026, BMC veterinary research) — First report of an iridophoroma in a Tegu (Salvator merianae).. Abstract (opening): <h4>Background</h4>This case report describes the clinical and histological findings of a rare periocular iridophoroma in a tegu.<h4>Case presentation</h4>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.<h4>Conclusions</h4>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. *[CC BY — Open Access, verbatim with attribution.]*
Source: https://pubmed.ncbi.nlm.nih.gov/41749246/
Source text: pdf-raw/evidence/europepmc_reptile_toxicology_2026-08-01.txt (Europe PMC first-hand abstracts, pulled 2026-08-01).
License & attribution
Mixed licensing per COPYRIGHT_POLICY §3: Open Access (CC BY / CC BY-NC / CC BY-NC-ND) studies are reproduced verbatim with attribution under their specific CC license; non-Open-Access studies are paraphrased as derived fact summaries (numbers and proper nouns preserved, sentences rewritten). Original records:
- https://pubmed.ncbi.nlm.nih.gov/42041919/
- https://pubmed.ncbi.nlm.nih.gov/42146017/
- https://pubmed.ncbi.nlm.nih.gov/42347420/
- https://pubmed.ncbi.nlm.nih.gov/42223730/
- https://pubmed.ncbi.nlm.nih.gov/41893567/
- https://pubmed.ncbi.nlm.nih.gov/41954651/
- https://pubmed.ncbi.nlm.nih.gov/42376688/
- https://pubmed.ncbi.nlm.nih.gov/41749246/
Cleaning removal log (2026-08-05, codebuddy)
PMID 41972498 — 'Reptile' here is a meta-learning ML algorithm, not the animal — no reptile subject (false keyword match, rule 2/3). PMID 42325831 — Spider-venom paralysis/lethality (PD50/LD50) corrigendum — spider (arachnid), not a reptile (rule 2). PMID 42152245 — Antileishmanial peptides scoping review — Leishmania parasite/peptide study, no reptile subject (rule 2).