Two Perkinsus spp. infect Crassostrea gasar oysters from cultured and wild populations of the Rio São Francisco estuary, Sergipe, northeastern Brazil

Silva, Patrícia Mirella da; Scardua, Marcos Paiva; Vianna, Rogério Tubino; Mendonça, Raoani Cruz; Barreto, Cairé; Dungan, Christopher F.; Scott, Gail P.; Reece, Kimberly S.

doi:10.1016/j.jip.2014.04.005

Cited by 40 publications

(39 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Villanueva Dual infections in oyster species have been reported in areas that historically have had a long history of surveillance, for example in C. virginica on the east coast of the United States with dual infections of Haplosporidium nelsoni and P. marinus (RagoneCalvo et al, 2003), similarly in Crassostrea hasar with P. olseni and P. marinus in Brazil (Da Silva et al, 2014). The oyster cultures in the Gulf of California begin with pathogen-free spat according to regulation, but the Gulf of California waters harbor pathogens that are of global concern, does not guarantee a pathogenfree culture.…”

Section: Discussionmentioning

confidence: 99%

OsHV 1 and notifiable protozoa in healthy Crassostrea corteziensis cultured in two distant areas of the Gulf of California

Martínez-Garciá

Chon

Castro‐Longoria

et al. 2017

lajar

View full text Add to dashboard Cite

ABSTRACT. Infectious diseases have been a major limiting factor for large scale production of oyster farming. Several factors have contributed to the emergence and spread of infectious diseases in all cultivation sites around the world. Therefore, the prevention and control of diseases has become a priority for the sustainability of global aquaculture. Crassostrea corteziensis is a native species that contributes to the Mexican Pacific oyster production and used in this study to assess seasonal simultaneous infective events between distant areas in the Gulf of California. The results of the molecular analysis showed a higher prevalence of Perkinsus marinus in the north area and Marteilia refringens in the south. OsHV-1 was only present in summer and autumn with low prevalence in the two areas. The histological analysis of the PCR-positive organisms presented alterations characteristic of infections. The presence of M. refringens in a new location on the Gulf of California suggests that this pathogen is already well established in the area and the dual presence of pathogens in C. corteziensis is reported for the first time.

show abstract

Section: Discussionmentioning

confidence: 99%

OsHV 1 and notifiable protozoa in healthy Crassostrea corteziensis cultured in two distant areas of the Gulf of California

Martínez-Garciá

Chon

Castro‐Longoria

et al. 2017

lajar

View full text Add to dashboard Cite

show abstract

“…According to Silva et al [29], the dynamics of infection by P. marinus and P. olseni in C. gasar (= C. brasiliana) may have seasonal variations in tropical climate and be associated with cultural practices. This variation of infection may also be associated with C. rhizophorae, which would explain the low prevalence in the study.…”

Section: Discussionmentioning

confidence: 99%

Protozoan Parasite Perkinsus sp. Infecting Crassostrea rhizophorae From the Coast of Rio Grande do Norte (Northeast of Brazil)

Silva¹

2017

JAMB

View full text Add to dashboard Cite

The aquatic environment facilitates the horizontal transmission of pathogenic agents. The protozoa parasites of the genus Perkinsus cause an epidemic disease of marine bivalves throughout the world, often causing mortality in populations of molluscs. This study reports for the first time the presence of Perkinsus sp. infecting Crassostrea rhizophorae from the coast of the state Rio Grande do Norte. The samples of mangrove oysters (Crassostrea rhizophorae) occurred in summer, in December (N = 10) of 2016, January (N = 40) and February (N = 40) of 2017 from the estuary Porto do Mangue. Two fragments of the gills were incubated in Ray's Fluid Thioglycollate Medium -RFTM. The ecological parameters parasitological were calculated. Were found parasitized five of the ninety oysters collected in porto do mangue estuary, which corresponded to a mean prevalence of perkinsose of 5.56%. The intensity of infection by perkinsose ranged from very light the mild.

show abstract

“…In situ hybridization (ISH), the detection of pathogens in histological sections using DNA probes, is a similarly valuable molecular assay but a more specialized tool used primarily for characterizing new pathogens [56,57] and linking known pathogens to new hosts [58,59]. Both PCR and ISH are valuable in elucidating life cycles.…”

Section: The Paradox Of Advanced Diagnosticsmentioning

confidence: 99%

Managing marine mollusc diseases in the context of regional and international commerce: policy issues and emerging concerns

Carnegie

Arzul

Bushek

2016

Phil. Trans. R. Soc. B

View full text Add to dashboard Cite

Marine mollusc production contributes to food and economic security worldwide and provides valuable ecological services, yet diseases threaten these industries and wild populations. Although the infrastructure for mollusc aquaculture health management is well characterized, its foundations are not without flaws. Use of notifiable pathogen lists can leave blind spots with regard to detection of unlisted and emerging pathogens. Increased reliance on molecular tools has come without similar attention to diagnostic validation, raising questions about assay performance, and has been accompanied by a reduced emphasis on microscopic diagnostic expertise that could weaken pathogen detection capabilities. Persistent questions concerning pathogen biology and ecology promote regulatory paralysis that impedes trade and which could weaken biosecurity by driving commerce to surreptitious channels. Solutions that might be pursued to improve shellfish aquaculture health management include the establishment of more broad-based surveillance programmes, wider training and use of general methods like histopathology to ensure alertness to emerging diseases, an increased focus on assay assessment and validation as fundamental to assay development, investment in basic research, and application of risk analyses to improve regulation. A continual sharpening of diagnostic tools and approaches and deepening of scientific knowledge is necessary to manage diseases and promote sustainable molluscan shellfish industries.

show abstract

Two Perkinsus spp. infect Crassostrea gasar oysters from cultured and wild populations of the Rio São Francisco estuary, Sergipe, northeastern Brazil

Cited by 40 publications

References 40 publications

OsHV 1 and notifiable protozoa in healthy Crassostrea corteziensis cultured in two distant areas of the Gulf of California

OsHV 1 and notifiable protozoa in healthy Crassostrea corteziensis cultured in two distant areas of the Gulf of California

Protozoan Parasite Perkinsus sp. Infecting Crassostrea rhizophorae From the Coast of Rio Grande do Norte (Northeast of Brazil)

Managing marine mollusc diseases in the context of regional and international commerce: policy issues and emerging concerns

Contact Info

Product

Resources

About