Nematodes from <i>Achatina fulica</i> Bowdich, 1822 (Mollusca: Gastropoda) in Argentina

Valente, Romina; Díaz, Julia Inés; Lorenti, Eliana; Salomón, Oscar Daniel; Navone, Graciela Teresa

doi:10.1515/helmin-2015-0071

Cited by 9 publications

(9 citation statements)

References 8 publications

(11 reference statements)

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“…(1) agriculture, destructing crops; (2) human health, acting as an intermediate host of several parasites, e.g. nematodes Angiostrongylus costaricensis (Morera and Cespedes, 1971), A. cantonensis (Chen, 1935), and Aelurostrongylus abstrusus (Raillet, 1898); (3) native fauna, via inter-specific competition (Thiengo et al 2007;Thiengo and Fernández 2016;Valente et al 2016).…”

Section: Relationship Between Nnms Richness and Urbanized Areas And Tmentioning

confidence: 99%

Non-native mollusks throughout South America: emergent patterns in an understudied continent

et al. 2020

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Non-native species have been introduced at escalating rates during the last decades, mainly due to the dispersion generated by the increasing trade and transport worldwide. Mollusks, the second largest metazoan phylum in terms of species richness, are no exception to this pattern, but, to date, a comprehensive synthesis of non-native mollusk species (NNMS) in South America was not available. For this purpose, an e-discussion group was formed with malacologists and taxonomists from South America, where we exchanged and analyzed bibliography, databases and information about NNMS, providing expert opinion to this assessment. The first list of non-native mollusk species for South America, considering terrestrial, freshwater and marine environments, includes 86 NNMS distributed in 152 ecoregions (terrestrial, freshwater and marine) of the 189 recognized for the South American continent. Information on their native region, vectors, first record for South America and distribution, are also provided. In the analysis of the distribution of the NNMS and the entry points of each species (e.g., ports, cargo and passenger airports, cities) and status of conservation of the ecoregions, four hot spots were recognized: Subtropical-Atlantic,

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Section: Relationship Between Nnms Richness and Urbanized Areas And Tmentioning

confidence: 99%

Non-native mollusks throughout South America: emergent patterns in an understudied continent

et al. 2020

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“…Then, we can consider that the infection of Achatina fulica by Strongyluris spp. larvae could be explained by the role of the snail as an intermediate host, as observed by Valente et al (2016). This hypothesis can be accepted, as Fischer et al (2010) mentions that the habitat and habits of A. fulica facilitate the parasitism in this species.…”

Section: Discussionmentioning

confidence: 86%

Distribution of cysts of Strongyluris sp. (Nematoda) in the pallial system of Achatina fulica Bowdich, 1822 from Vila Dois Rios and Vila do Abraão, Ilha Grande, Angra dos Reis, Rio de Janeiro

Oliveira

Santos

2019

Braz. J. Biol.

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This work aimed to assessing Strongyluris sp. cysts distribution pattern in the several inner organs from pallial system of Achatina fulica Bowdich, 1822. Also we verified if there is a relationship between the mollusk size and the number of specimens from parasites collected from two touristic villages in Ilha Grande (Angra dos Reis, Rio de Janeiro state): Vila Dois Rios (VDR) and Vila do Abraão (ABR). The samples were obtained through a field work conducted bimonthly during 2007, 2008, 2010, and 2011, at both locations. Height and width were measured from shells collected, and the all specimens were classified in different classes: class 1 - <4.0 cm, class 2 - 4.1-9.0 cm and class 3 - < 9.0 cm. After the specimens were dissected in order to find and count the number cysts in the pallial system. In specimens from both locations, the pulmonary and secondary veins showed a high number of cysts. No significance difference was found both in the abundance of cysts among the specimens in ABR (p=0.138) and VDR (p=0.181). Achatina fulica showed different intensities of cyst infection based on the size classes: the class-3 specimens, at both locations, showed the greatest cyst average (ABR Anova F= 3.8; p=0.02); (VDR T of Student T= -2.04; p=0.04). The results suggested that the highest number of cysts in the vascularized area in pallial system of A. fulica was a consequence of a greater hemolymph circulation in that area, delivering more nutrients for larvae development. We think that bigger individuals host a higher number of cysts, as they usually present a larger biomass and a larger area of the pallial system, allowing an efficient parasite colonization. Other possible explanation could be the long exposure of the molluscs of class 3 to the parasites, which allowed a longer time to the larvae to allocate themselves.

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“…2D). These morphological characteristics were also described by Thiengo (1995), Franco-Acuña et al (2009), and Valente et al (2016 to L3 larvae identified as Strongyluris sp. (family Heterakidae).…”

Section: Nematode Identificationmentioning

confidence: 77%

Occurrence of Cruzia tentaculata Larvae in the Land Snail Megalobulimus abbreviatus—Influence of Natural Parasite Load on Snail Physiology

Machado,

Mentz,

Hartke

et al. 2023

Zoological Science

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The nematode Cruzia tentaculata is reported here for the first time in the land snail Megalobulimus abbreviatus in southern Brazil. The snails were infected with a high prevalence of larvae up to the L3 stage (68.6%). Cysts were located mainly in the mantle (pulmonary cavity) and the nerve ring. No other helminths were identified in the collected snails. Some physiological aspects were compared between snails infected with L3 larvae and non-infected snails and among infected animals with different parasite loads. No differences were found in hemolymph protein, glucose, or urea content between L3-infected and non-infected snails, nor among animals with different parasite loads. Discontinuous lesions in the rectum associated with the presence of encapsulated larvae were visible in animals with high parasite loads and were more frequent in adult animals. All analyses were carried out during the breeding season; however, the albumen glands of mature snails had a smaller volume in those with higher parasite loads. Ovotestis weight was also significantly negatively correlated with parasite load. Snail reproductive capacity could, therefore, be partially impaired but only for individuals with higher parasite loads. Considering only the measured parameters, natural infection by C. tentaculata does not appear to affect intermediary metabolism of M. abbreviatus. A greater number of larvae and greater severity of tissue injuries are more frequently observed in older snails.

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Nematodes from Achatina fulica Bowdich, 1822 (Mollusca: Gastropoda) in Argentina

Cited by 9 publications

References 8 publications

Non-native mollusks throughout South America: emergent patterns in an understudied continent

Non-native mollusks throughout South America: emergent patterns in an understudied continent

Distribution of cysts of Strongyluris sp. (Nematoda) in the pallial system of Achatina fulica Bowdich, 1822 from Vila Dois Rios and Vila do Abraão, Ilha Grande, Angra dos Reis, Rio de Janeiro

Occurrence of Cruzia tentaculata Larvae in the Land Snail Megalobulimus abbreviatus—Influence of Natural Parasite Load on Snail Physiology

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