Report of pathogens and parasites in Perumytilus purpuratus from San Jorge Bay, Antofagasta, Chile

Montenegro, Diana; Jones, J. B.; González, María Teresa

doi:10.4067/s0718-19572012000200017

Cited by 6 publications

(3 citation statements)

References 21 publications

(17 reference statements)

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“…Our result and other reports of digenea in P. purpuratus do not provide evidence to support the hypothesis of Minchella (1985). The minimum infection size is approximately 20 mm of shell length (Aldana, 2007; Aldana et al, 2009; Castro-Rojas et al, 2015; Montenegro et al, 2012; Muñoz et al, 2013a; b; Lienqueo, 2008), and the sexual maturity of P. purpuratus is reached at 8–10 mm in shell length (Lozada and Reyes, 1981), suggesting that the infection of P. purpuratus is posterior to sexual maturity. Although in this study the time of permanence of a parasite in its host and gonadal regeneration during this time were not evaluated, we did not observe gonadal tissue when the mussels were parasitized.…”

Section: Discussioncontrasting

confidence: 93%

Role of temperature and carbonate system variability on a host-parasite system: Implications for the gigantism hypothesis

García-Huidobro

Varas

George-Nascimento

et al. 2019

International Journal for Parasitology: Parasites and Wildlife

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Biological interactions and environmental constraints alter life-history traits, modifying organismal performances. Trematode parasites often impact their hosts by inducing parasitic castration, frequently correlated with increased body size in the host (i.e., gigantism hypothesis), which is postulated to reflect the re-allocation of energy released by the reduction in the reproductive process. In this study, we compared the effect of a trematode species on shell size and morphology in adult individuals of the intertidal mussels Perumytilus purpuratus (>20 mm) collected from two local populations of contrasting environmental regimes experienced in central-southern Chile. Our field data indicates that in both study locations, parasitized mussels evidenced higher body sizes (shell length, total weight and volume) as compared with non-parasitized. In addition, parasitized mussels from the southern location evidenced thinner shells than non-parasitized ones and those collected from central Chile, suggesting geographical variation in shell carbonate precipitation across intertidal habitats of the Chilean coast. In laboratory conditions, mussels collected from a local population in central Chile were exposed to two temperature treatments (12 and 18 °C). Parasitized mussels showed higher growth rates than non-parasitized, regardless of the seawater temperature treatments. However, the metabolic rate was not influenced by the parasite condition or the temperature treatments. Our field and laboratory results support the parasite-induced gigantism hypothesis, and suggest that both the thermal environment and geographic location explain only a portion of the increased body size, while the parasitic condition is the most plausible factor modulating the outcome of this host-parasite interaction.

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Section: Discussioncontrasting

confidence: 93%

Role of temperature and carbonate system variability on a host-parasite system: Implications for the gigantism hypothesis

García-Huidobro

Varas

George-Nascimento

et al. 2019

International Journal for Parasitology: Parasites and Wildlife

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“…Intracytoplasmic vacuoles have been observed in all types of epithelial cells from distinct tissues, although they are most commonly observed in the gills (Meyers, 1981; Gulka et al, 1983; Leibovitz et al, 1984; Norton et al, 1992; Renault & Cochennec, 1994; Villalba et al, 1999; Meyers & Burton, 2009; Zhu et al, 2012; Carvalho et al, 2013; Da Silva et al, 2015), digestive gland (Harshbarger & Chang, 1977; Gulka et al, 1983; Comps, 1986; Wen et al, 1994; Diggles & Oliver, 2005; Lohrmann, 2009; Cáceres‐Martínez et al, 2010; Boehs et al, 2010; Montenegro et al, 2012; Cáceres‐Martínez & Vásquez‐Yeomans, 2013; Carvalho et al, 2016) and mantle (Meyers, 1981; Norton et al, 1992, 1993b; Wu & Pan, 1999a; Wu & Pan, 2000; Sun & Wu, 2004; Meyers & Burton, 2009; Zhu et al, 2012). In rare cases, IVs have been reported in the gonads (Fries & Grant, 1991; Cremonte et al, 2005).…”

Section: Histologymentioning

confidence: 99%

Rickettsiales‐like organisms in bivalves and marine gastropods: a review

Cruz‐Flores

Cáceres-Martı́nez

2020

Reviews in Aquaculture

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Rickettsiales‐like organisms (RLOs) are intracellular bacteria that have been reported to be symbionts of over 60 species of bivalves and marine gastropod molluscs of aquaculture importance around the world. Morphologically, some of these prokaryotes are similar to bacteria from the order Rickettsiales, and in most cases, they form intracytoplasmic inclusions similar to those observed in bacteria of the family Anaplasmataceae. Genetically, only Candidatus Xenohaliotis californiensis (CXc), a parasite of several abalone species, has been classified as a member of the order Rickettsiales. The other two characterized RLOs are distantly related; one belongs to the same class (α‐proteobacteria), and the other belongs to the γ‐proteobacteria. Hyperparasitism of RLOs by bacteriophages has been reported in several species of mollusc and appears to have a negative effect on RLOs. The intracellular lifestyle of RLOs has been associated with cell alterations including hypertrophy and compression of the cytoplasmic organelles, and in most cases, no host reaction is observed by histology. In some cases, a high infection intensity of RLOs has been related to dysfunction of the affected organs that can result in disease, and in other cases, high burdens of RLOs have been associated with mortality, but most of these cases have yet to be confirmed. To date, only CXc has been confirmed as the aetiological agent of a chronic and potentially lethal disease of several abalone species known as withering syndrome. This disease is listed by the World Organization of Animal Health. With the ever‐increasing interest in preserving fisheries and expanding the aquaculture production of mollusc species, more efforts should be focused on the characterization and study of RLOs to elucidate the type of symbiosis they maintain with their host and determine when they are acting as true pathogens that should be subjected to control in aquaculture. This review provides an overview of the literature on RLOs that infect bivalves and gastropods of aquaculture importance, and we discuss the most important aspects of these unique prokaryotes.

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“…Por otra parte, la ocurrencia de otros patógenos procariontes como Candidatus Xenohaliotis californiensis y organismos tipo rickettsiales (Rickettsia-Like Organisms, RLO) han sido detectados mediante el uso de técnicas histológicas en H. rufescens y A. purpuratus, respectivamente (Lohrmann et al 2002, Campalans & Lohrmann 2009, Lohrmann 2009. Asimismo, se han detectado RLO en ejemplares de Perumytilus purpuratus (Montenegro et al 2012).…”

Section: Moluscosunclassified

Bacteriología asociada al cultivo de moluscos en Chile: Avances y perspectivas

Fuente

Miranda

Faúndez³

2015

Rev. biol. mar. oceanogr.

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Excessive fishing effort has led to overexploitation and depletion of major benthic fisheries in Chile, so it has been encouraged cultivation of major overexploited benthic resources in controlled environments, mainly those which are not possible to collect seeds from environment. In this review, the current knowledge on bacteriology associated with shellfish farming in controlled systems in Chile, including both aspects associated with development of infectious diseases of bacterial aetiology as well as the use of microorganisms to reduce mortality of cultured species, is described. The majority of bacteriological studies in Chilean shellfish culture were done in the Chilean scallop, Argopecten purpuratus and were related to identifying pathogens isolated from mass mortalities occurred in larval and/or juvenile cultures and the verification of their pathogenic activity performing bioassays under controlled condition bioassays. There are also a large number of studies on bacteria exhibiting inhibitory activities against shellfish pathogenic and their protective effects under controlled conditions. Despite the above, still are required more studies to know the structure and dynamics of the microbiota associated to mollusk culture, bacterial pathogens and molecular elements encoding for their pathogenicity.

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Report of pathogens and parasites in Perumytilus purpuratus from San Jorge Bay, Antofagasta, Chile

Cited by 6 publications

References 21 publications

Role of temperature and carbonate system variability on a host-parasite system: Implications for the gigantism hypothesis

Role of temperature and carbonate system variability on a host-parasite system: Implications for the gigantism hypothesis

Rickettsiales‐like organisms in bivalves and marine gastropods: a review

Bacteriología asociada al cultivo de moluscos en Chile: Avances y perspectivas

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