Flat oysters Ostrea edulis are not susceptible to Marteilia pararefringens infection.

IF 1.1 4区 农林科学 Q3 FISHERIES
Mats Bøgwald, Cecilie Skår, Stein Mortensen
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引用次数: 0

Abstract

The host specificity of Marteilia pararefringens is under discussion after its suggested reseparation from the flat oyster pathogen M. refringens in 2018. In Norway, M. pararefringens has been detected in mussels Mytilus spp. sampled from several isolated, small heliothermic ponds (polls) that, at least on the western coast, inhabit some of the last reproducing flat oyster populations. M. refringens has never been detected in Norway. The polls have a limited water exchange, and their uniquely warm temperature can result in high M. pararefringens prevalence and infection intensities, representing unique sites to study the susceptibility of flat oysters to this parasite. We have sampled flat oysters and mussels from all known M. pararefringens sites along the Norwegian coast. All flat oysters and mussels were screened by histology and PCR. Furthermore, to study the potential effect of natural resistance breeding of local flat oysters subjected to repetetive M. pararefringens cycles, we deployed naïve flat oysters from a known Marteilia-free poll to Agapollen, where the parasite has had consistent infection cycles since its discovery in 2016. Naïve mussels were deployed simultaneously in 2 separate years to verify that the flat oysters were subjected to at least 2 transmission cycles. M. pararefringens was not detected in any flat oysters in any poll, local or naïve, despite presence in the mussel populations. Our results show that the European flat oyster Ostrea edulis is not a susceptible host for M. pararefringens.

扁平牡蛎Ostrea edulis对副边缘麻豆病菌不敏感。
在2018年被认为与平牡蛎病原体M. refringens重新分离后,对Marteilia pararefringens的宿主特异性进行了讨论。在挪威,从几个孤立的小型日光池(调查)中取样的贻贝(Mytilus)中发现了pararefringens,至少在西海岸,这些池塘居住着一些最后繁殖的扁平牡蛎种群。挪威从未发现过折射芽孢杆菌。调查区水交换有限,其独特的温暖温度可导致副棱螺旋体的高流行率和感染强度,为研究平牡蛎对该寄生虫的易感性提供了独特的地点。我们从挪威沿海所有已知的平牡蛎和贻贝地点取样。所有的平牡蛎和贻贝进行组织学和PCR筛选。此外,为了研究当地平生牡蛎在重复的pararefringens循环下自然抗性繁殖的潜在影响,我们将naïve平生牡蛎从已知的无marteilia民意调查中部署到Agapollen,该寄生虫自2016年发现以来一直具有一致的感染周期。Naïve贻贝在两个不同的年份同时被放置,以验证扁平牡蛎至少经历了两次传播周期。尽管在贻贝种群中存在,但在当地或naïve的任何民意调查中均未在任何扁平牡蛎中检测到副边缘分枝杆菌。本研究结果表明,欧洲平牡蛎(Ostrea edulis)不是副棱杆菌的易感宿主。
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来源期刊
Diseases of aquatic organisms
Diseases of aquatic organisms 农林科学-兽医学
CiteScore
3.10
自引率
0.00%
发文量
53
审稿时长
8-16 weeks
期刊介绍: DAO publishes Research Articles, Reviews, and Notes, as well as Comments/Reply Comments (for details see DAO 48:161), Theme Sections and Opinion Pieces. For details consult the Guidelines for Authors. Papers may cover all forms of life - animals, plants and microorganisms - in marine, limnetic and brackish habitats. DAO''s scope includes any research focusing on diseases in aquatic organisms, specifically: -Diseases caused by coexisting organisms, e.g. viruses, bacteria, fungi, protistans, metazoans; characterization of pathogens -Diseases caused by abiotic factors (critical intensities of environmental properties, including pollution)- Diseases due to internal circumstances (innate, idiopathic, genetic)- Diseases due to proliferative disorders (neoplasms)- Disease diagnosis, treatment and prevention- Molecular aspects of diseases- Nutritional disorders- Stress and physical injuries- Epidemiology/epizootiology- Parasitology- Toxicology- Diseases of aquatic organisms affecting human health and well-being (with the focus on the aquatic organism)- Diseases as indicators of humanity''s detrimental impact on nature- Genomics, proteomics and metabolomics of disease- Immunology and disease prevention- Animal welfare- Zoonosis
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