Skin-mates or neighbors? A seasonal study of amphibian chytrid and dermocystid infection in Boana pulchella (Anura: Hylidae)

Borteiro, Claudio; Gobel, Noelia; Kolenc, Francisco; Laufer, Gabriel; Debat, Claudio Martínez; Ubilla, Martı́n

doi:10.31017/cdh.2018.(2018-012)

Cited by 7 publications

(7 citation statements)

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“…Borteiro et al . (2018 b ) identified D. hylarum in Scinax fuscovarius , but not in any other amphibian species examined; Jay and Pohley (1981) found D. penneri in A. americanus , but not in six other species from the same study site; and Broz and Privora (1952) identified A. ranae in R. temporaria , but not R. esculenta or any other species occupying the same habitat. The present study documented Dermotheca sp.…”

Section: Discussionmentioning

confidence: 98%

“…While robust epidemiologic data for amphibian dermocystids is limited, a few consistent trends emerge when all available literature is considered together. Several studies demonstrate that dermocystid prevalence is highest in cooler seasons including late fall, winter and early spring (Pérez, 1907; Pérez, 1913; Guyénot and Naville, 1922; Remy, 1931; Poisson, 1937; Broz and Privora, 1952; Jay and Pohley, 1981; Green et al ., 2002; Raffel et al ., 2008; Borteiro et al ., 2018 b ). This could be due to temperature-dependent alterations in host immunity, seasonal behavioral changes facilitating infection and/or cooler temperatures promoting parasite replication, as documented for B. dendrobatidis (Berger 2004; Kriger and Hero, 2007; Rowley and Alford, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Dermocystid prevalence can vary between wetlands and years, indicating that host and environmental factors likely influence lesion development (Broz and Privora, 1952; Raffel et al ., 2008; Courtois et al ., 2013; Fiegna et al ., 2017; Borteiro et al ., 2018 b ; Fagotti et al ., 2019). Furthermore, dermocystid prevalence can vary between sympatric species examined within a single sampling period.…”

Section: Discussionmentioning

confidence: 99%

“…Prevalence of A. ranae was significantly higher in a population of declining R. lessonae (45.5-52.4%) than a stable population of R. esculenta (14.3-17.2%) from the same wetland complex in Italy (Pascolini et al, 2003). Borteiro et al (2018b) identified D. hylarum in Scinax fuscovarius, but not in any other amphibian species examined; Jay and Pohley (1981) found D. penneri in A. americanus, but not in six other species from the same study site; and Broz and Privora (1952) identified A. ranae in R. temporaria, but not R. esculenta or any other species occupying the same habitat. The present study documented Dermotheca sp.…”

Section: Parasitologymentioning

confidence: 95%

“…Many of these methods require biopsy or sacrifice of affected animals, making visual examination an attractive option. Several studies rely on visual detection of dermocystids exclusively, however, few have critically evaluated the sensitivity and specificity of this method (Courtois et al, 2013;Diego-Rasilla 2017;Galán and Dopereiro, 2017;Borteiro et al, 2018b). Raffel et al (2008) dissected 106 eastern newts and found that 12 newts with visible cutaneous D. viridescens lesions had consistent sporangia in the skin on histologic examination.…”

Section: Parasitologymentioning

confidence: 99%

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Characterization ofDermothecasp. Infection in a midwestern state-endangered salamander (Ambystoma platineum) and a co-occurring common species (Ambystoma texanum)

Adamovicz¹,

Woodburn²,

Herrera³

et al. 2020

Parasitology

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Ichthyosporean parasites (order Dermocystida) can cause morbidity and mortality in amphibians, but their ecology and epidemiology remain understudied. We investigated the prevalence, gross and histologic appearance, and molecular phylogeny of a novel dermocystid in the state-endangered silvery salamander (Ambystoma platineum) and the co-occurring, non-threatened small-mouthed salamander (Ambystoma texanum) from Illinois. Silvery salamanders (N = 610) were sampled at six ephemeral wetlands from 2016 to 2018. Beginning in 2017, 1–3 mm raised, white skin nodules were identified in 24 silvery salamanders and two small-mouthed salamanders from five wetlands (prevalence = 0–11.1%). Skin biopsy histology (N = 4) was consistent with dermocystid sporangia, and necropsies (N = 3) identified infrequent hepatic sporangia. Parasitic 18S rRNA sequences (N = 5) from both salamander species were identical, and phylogenetic analysis revealed a close relationship to Dermotheca viridescens. Dermocystids were not identified in museum specimens from the same wetlands (N = 125) dating back to 1973. This is the first report of Dermotheca sp. affecting caudates in the Midwestern United States. Future research is needed to determine the effects of this pathogen on individual and population health, and to assess whether this organism poses a threat to the conservation of ambystomatid salamanders.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Parasitologymentioning

confidence: 95%

Section: Parasitologymentioning

confidence: 99%

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Characterization ofDermothecasp. Infection in a midwestern state-endangered salamander (Ambystoma platineum) and a co-occurring common species (Ambystoma texanum)

Adamovicz¹,

Woodburn²,

Herrera³

et al. 2020

Parasitology

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Ontogenetic skull variation in a shovel‐headed amphisbaenian species

Hohl,

Azorit,

Vassallo

et al. 2023

Journal of Morphology

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Leposternon microcephalum is a species belonging to the Amphisbaenia, a group of burrowing reptiles. Amphisbaenia present various morphological and physiological adaptations that allow them to penetrate the ground and live underground, through a system of galleries and permanent chambers that they build themselves. Among the morphological adaptations in this group, those of the skull stand out as it serves as the main excavation tool. Four basic skull shapes are recognized: rounded, keeled, shovel‐shaped, and spade‐shaped. The skull of L. microcephalum belongs to this last type, which is considered the most specialized. The species inhabits soils that are highly compacted and difficult to penetrate. Among the species of Leposternon present in South America, L. microcephalum has the widest distribution, being found in all Brazilian biomes and neighboring countries such as Bolivia, Argentina, Paraguay, and Uruguay. The analysis of the skull of this species was carried out using three‐dimensional geometric morphometrics (3D‐GMM), a technique that allows comparative analysis, through robust statistical methods, of shape and its variations, using Cartesian coordinate data from a configuration of homologous landmarks. The technique allows the size and shape components of a structure to be analyzed separately. From an ontogenetic point of view, this methodology had also been used to investigate variations in Cynisca leucura, a member of the Amphisbaenidae with a rounded head. Our hypothesis is that the patterns of morphological differentiation in the skull, mainly in the intermediate and occipital regions, are similar in different Amphisbaenia species. Therefore, the objective of this study was to analyze cranial morphological variations in an ontogenetic series of L. microcephalum using 3D‐GMM. Computed Tomographic scans of 13 specimens were analyzed: juveniles (N = 8) and adults (N = 5), based on 20 landmarks that characterize the skull. Principal components and regression analyses between shape (dependent variable) and size (independent variable) showed a clear difference between the cranial morphological pattern of juvenile individuals and that of adults. For instance, young specimens tend to have a dorsoventrally tall neurocranium, with the tip of the snout more anteriorly oriented and its dorsal border subtly curved. Dorsally, the parietal region is thicker and smoothly dome‐shaped in juveniles. As in C. leucura, the variation was strongly correlated with the size change from juvenile to adult, indicating a dominant role for ontogenetic allometry in determining skull shape.

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Triple dermocystid-chytrid fungus-ranavirus co-infection in a Lissotriton helveticus

Ayres¹,

Acevedo

Monsalve-Carcaño

et al. 2020

Eur J Wildl Res

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Skin-mates or neighbors? A seasonal study of amphibian chytrid and dermocystid infection in Boana pulchella (Anura: Hylidae)

Cited by 7 publications

References 0 publications

Characterization ofDermothecasp. Infection in a midwestern state-endangered salamander (Ambystoma platineum) and a co-occurring common species (Ambystoma texanum)

Characterization ofDermothecasp. Infection in a midwestern state-endangered salamander (Ambystoma platineum) and a co-occurring common species (Ambystoma texanum)

Ontogenetic skull variation in a shovel‐headed amphisbaenian species

Triple dermocystid-chytrid fungus-ranavirus co-infection in a Lissotriton helveticus

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