The influence of aestivation in land snails on the larval development of Muellerius cf. capillaris (Metastrongyloidea: Protostrongylidae)

Solomon, Allan I.; Paperna, I.; Markovics, Alex

doi:10.1016/0020-7519(96)00013-6

Cited by 21 publications

(15 citation statements)

References 12 publications

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“…Development to L 3 stage in Vallonia is temperaturedependent (Samson and Holmes, 1985), but likely occurs faster over a longer season in Utah than in Alberta, Canada. While aestivation of host gastropods slows development of protostrongylid larvae to the infective stage (Solomon et al, 1996), greater activity of gastropods in riparian habitats would lessen this effect on availability of L 3 larvae to bighorn sheep.…”

Section: Discussionmentioning

confidence: 99%

“…Emphasis was placed on collecting fresh fecal pellets because, in the presence of precipitation, lungworms may become activated and exit feces in search of intermediate host gastropods (Forrester, 1971). Hot, dry conditions may reduce the number of viable lungworm larvae in feces through desiccation, although protostrongylid larvae seem quite tolerant (Forrester and Senger, 1963;Solomon et al, 1998). Using only fresh feces ensured more accurate assessment of fecal output of lungworm larvae.…”

Section: Bighorn Sheep Distribution and Fecal Analysismentioning

confidence: 99%

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Ecology of Gastropod and Bighorn Sheep Hosts of Lungworm on Isolated, Semiarid Mountain Ranges in Utah, Usa

Rogerson

Fairbanks

Cornicelli

2008

Journal of Wildlife Diseases

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ABSTRACT:Isolated, nonmigratory populations of bighorn sheep (Ovis canadensis) may experience high exposure to lungworms (Protostrongylus spp.) through a build-up of fecal material. However, semiarid climates may hinder lungworm transmission by limiting terrestrial gastropods, the intermediate hosts. We assessed potential for lungworm transmission, documented occurrence of transmission, and identified habitat types where transmission was likely to occur on ranges of two recently introduced populations of bighorn sheep in northern Utah. Gastropods were collected weekly on Antelope Island and the Newfoundland Mountains, May-August 2001-02, from each of the four major habitat types (riparian, rock, desert shrub, and grass). Distribution of 113 bighorn sheep groups was observed, and 421 fecal pellet groups were collected to estimate lungworm levels. A total of 1,595 gastropods representing five genera were collected from both ranges. Vallonia made up 85% of all gastropods collected. Of 980 gastropods collected on Antelope Island in 2002, only Vallonia were found infected with protostrongylid-type larvae (10 of 98051%). Lungworm prevalence in bighorn fecal samples was 97% on Antelope Island and 90% on the Newfoundland Mountains. Lungworm prevalence in lambs indicated lungworm transmission was occurring on Antelope Island. Lungworm transmission was likely occurring in riparian habitat due to abundant gastropods, presence of infected gastropods, and reliance by bighorn sheep on few water sources. Differences in spatial distribution between ram and nursery groups may partly explain higher fecal larvae counts in nursery than in ram groups. We suggest lungworm levels in bighorn sheep on semiarid ranges may increase in dry years as bighorn sheep concentrate use on fewer perennial water sources.

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Section: Discussionmentioning

confidence: 99%

Section: Bighorn Sheep Distribution and Fecal Analysismentioning

confidence: 99%

Ecology of Gastropod and Bighorn Sheep Hosts of Lungworm on Isolated, Semiarid Mountain Ranges in Utah, Usa

Rogerson

Fairbanks

Cornicelli

2008

Journal of Wildlife Diseases

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“…When infected gastropods aestivate, such as during summer droughts, parasite development is normally inhibited (Solomon et al 1996) and host survival is reduced compared to uninfected snails. Temperature can be a limiting factor on parasite development, both within invertebrate hosts and in free-living parasites.…”

Section: Discussionmentioning

confidence: 99%

Intensity of parasitic mite infection decreases with hibernation duration of the host snail

et al. 2012

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Temperature can be a limiting factor on parasite development. Riccardoella limacum, a haematophagous mite, lives in the mantle cavity of helicid land snails. The prevalence of infection by R. limacum in populations of the land snail Arianta arbustorum is highly variable (0-78%) in Switzerland. However, parasitic mites do not occur in host populations at altitudes of 1290 m or higher. It has been hypothesized that the host's hibernation period might be too long at high elevations for mites and their eggs to survive. To test this hypothesis, we experimentally infected snails and allowed them to hibernate at 4°C for periods of 4-7 months. Winter survival of host snails was negatively affected by R. limacum. The intensity of mite infection decreased with increasing hibernation duration. Another experiment with shorter recording intervals revealed that mites do not leave the host when it buries in the soil at the beginning of hibernation. The number of mites decreased after 24 days of hibernation, whereas the number of eggs attached to the lung tissue remained constant throughout hibernation. Thus, R. limacum survives the winter in the egg stage in the host. Low temperature at high altitudes may limit the occurrence of R. limacum.

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“…d Larvae L 2 with Glycine max-FITC-positive dense granules at the medial third, with a shortage at the extremities, mainly in the anterior end (Glicine max-FITC, LSCM). FITC=Fluorescein isothiocyanate, LSCM=laser scanning confocal microscopy larval cycles of nematodes in their snail hosts such as age (Cabaret 1987;Cheng and Alicata 1965;Wallace and Rosen 1969), parasitic load (Gerichter 1948), susceptibility (Gerichter 1948;Halvorsen and Skorping 1982), lack of nutrients -aestivation (Solomon et al 1996), and the host constitution (Rachford 1976). Therefore, we also believe that temperature may be the main environmental factor that directly influences larval development of Metastrongilidae, which constitutes important data in epidemiology and cycle maintenance in laboratory.…”

Section: Discussionmentioning

confidence: 96%

“…Studies have demonstrated that the nematode larval development in mollusks may be influenced by environmental factors such as humidity, temperature, estivation, intern factors such as infection intensity, and specific characteristics of the host like age, size, and susceptibility (Cheng and Alicata 1965;Gerichter 1948;Guilhon and Gaalon 1969;Halvorsen and Skorping 1982;Hori et al 1985;Ishii 1984;Kutz et al 1999;Rachford 1976;Rose 1957;Samson and Holmen 1984;Solomon et al 1996;Yousif and Lammler 1975;Wallace and Rosen 1969;Kutz et al 2001;Lv et al 2006;Jenkins 2006).…”

Section: Introductionmentioning

confidence: 97%

Development of Angiostrongylus costaricensis Morera and Céspedes 1971 (Nematoda: Angiostrongylidae) larvae in the intermediate host Sarasinula marginata (Semper 1885) (Mollusca: Soleolifera)

Mendonça¹,

Carvalho²,

Mota

et al. 2008

Parasitol Res

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In life cycle of Angiostrongylus costaricensis, veronicellidae mollusks participate as the invertebrate host while rodents as the main vertebrate host. The current work shows a sequential larval development of A. costaricensis in Sarasinula marginata, individually killed and digested from day 1 to 43, post infection. Some larvae, recovered from sedimentation, were submitted to selective staining after paraffin embedded or inclusion in JB-4 to study inner structures. As control, four slugs were used, two killed at the beginning of infection and the others at the end of the experiment. At day 2 post infection, larvae were motionless and thick, presenting initial retention of granules. At day 4, L2 were detected, persisting until 43 days post infection. Larvae L2 displayed a large amount of granules rich in lipids and carbohydrates through its overall body, with more accumulation at the medial third corresponding to the esophagus-intestine transition site. Lipid granules, the main energetic source, were located at the basal and apical regions of intestinal cells. Both L1 and L3 presented bilateral alae, which is also common in other nematodes. Transition forms between L2 to L3 molts were also observed.

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The influence of aestivation in land snails on the larval development of Muellerius cf. capillaris (Metastrongyloidea: Protostrongylidae)

Cited by 21 publications

References 12 publications

Ecology of Gastropod and Bighorn Sheep Hosts of Lungworm on Isolated, Semiarid Mountain Ranges in Utah, Usa

Ecology of Gastropod and Bighorn Sheep Hosts of Lungworm on Isolated, Semiarid Mountain Ranges in Utah, Usa

Intensity of parasitic mite infection decreases with hibernation duration of the host snail

Development of Angiostrongylus costaricensis Morera and Céspedes 1971 (Nematoda: Angiostrongylidae) larvae in the intermediate host Sarasinula marginata (Semper 1885) (Mollusca: Soleolifera)

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