Identification of putative genes involved in parasitism in the anchor worm, Lernaea cyprinacea by de novo transcriptome analysis

Pallavi, B.; Shankar, K. M.; Abhiman, P. B.; Ahmed, Iqlas

doi:10.1016/j.exppara.2015.03.014

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Although molecular data have been used in the identification of Lernaea species [10, 11, 14–16, 65, 66], previous molecular studies appear to have focused exclusively on L. cyprinacea , which is therefore the only species for which there are molecular data currently (October 2018) available in public databases. Although these also include a transcriptome [65], and the complete mitochondrial genome [66], identification of L. cyprinacea based on molecular data has been focused principally on partial sequences of two nuclear rRNA genes: 18S and 28S [11, 14–16]. This unavailability of molecular data for the remaining Lernaea species presents a major obstacle to their application as a tool for species identification [16].…”

Section: Discussionmentioning

confidence: 99%

Morphology is not a reliable taxonomic tool for the genus Lernaea: molecular data and experimental infection reveal that L. cyprinacea and L. cruciata are conspecific

et al. 2019

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BackgroundSpecies belonging to the genus Lernaea are cosmopolitan parasites that can infect many different freshwater fish hosts. Due to a high degree of morphological intraspecific variability and high levels of interspecific similarities, their classification is extremely difficult and controversial. Although the suitability of the shape of cephalic horns has been questioned decades ago by some experimental infection studies, this character still plays the central role in the identification of Lernaea spp.MethodsWe used the nominal species Lernaea cyprinacea and Lernaea cruciata to test the hypothesis that the shape of the anchor can exhibit host-induced morphological variability, and that the two taxa may be synonymous.ResultsWe examined 517 wild or farmed specimens of five host fish species (four cyprinids and a mosquitofish), and found that all 16 parasite specimens collected from mosquitofish could be morphologically identified as L. cruciata, whereas the remaining 25 parasite specimens were all identified as L. cyprinacea. We experimentally infected goldfish and mosquitofish specimens with offspring (copepodids) of a single L. cyprinacea specimen: the adult parasites from goldfish were morphologically identified as L. cyprinacea, and those from mosquitofish as L. cruciata. We then used molecular data to corroborate that all these specimens are conspecific.ConclusionsOur results suggest that L. cyprinacea and L. cruciata may be synonyms, misidentified as different species as a result of host-induced morphological variation. Given the current shortage of molecular data for the genus Lernaea, in order to resolve the taxonomy of this genus (determine the exact number of species), future studies should aim to sequence as much molecular data as possible, and conduct further experimental infections.

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Section: Discussionmentioning

confidence: 99%

Morphology is not a reliable taxonomic tool for the genus Lernaea: molecular data and experimental infection reveal that L. cyprinacea and L. cruciata are conspecific

et al. 2019

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“…Approximately 110 species of lernaeids (Lernaea and Lernaea-like parasites) have been described, but Lernaea cyprinacea (one of the more common species) is found worldwide. It is most common in cyprinids, including koi, common carp, goldfish, and other species of fish" [11,12].…”

Section: Introductionmentioning

confidence: 99%

Prevalence of Lernaea cyprinacea Infections in Indian Major Carp at Fish Farms of Bihar, India

Ranjan,

Sahu,

Verma

et al. 2024

UPJOZ

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Lernaea cyprinacea, commonly known as anchor worms, represents a significant parasitic threat to Indian Major Carp (IMC) species in the aquaculture system. Lernaea parasitizing is widely reported, affecting brood stock, fingerlings, and marketable-sized freshwater fish species globally. This study aims to comprehensively investigate Lernaea infections in ten fish farms across Bihar, India, focusing on the prevalence, intensity, water quality parameters, fish weight, and associated factors affecting the occurrence of this parasite. The research combines field surveys, laboratory analysis, and epidemiological assessments to provide a holistic understanding of the impact of Lernaea on the health and productivity of Indian major carp populations. The analysis revealed a positive correlation between host body weight and the intensity of Lernaea cyprinacea infestation. Larger fish were more susceptible to parasitic infections, highlighting a potential vulnerability associated with the size of the host. In conclusion, this study contributes valuable insights into the dynamics of Lernaea cyprinacea infections in IMC stocks, emphasizing the species-specific susceptibility and the influence of host body weight on parasitic infestations. The findings provide a foundation for informed aquaculture practices aimed at minimizing the prevalence and impact of Lernaea, thereby enhancing the overall health and productivity of fish farms in the region. In conclusion, current research confirms that Labeo catla and larger fish are very susceptible to Lernaea cyprinacea infection.

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Transcriptomic analysis of gene expression in immune pathways in the spleen of Takifugu rubripes after immunization with scuticociliate vaccine

Wang,

Gao,

et al. 2024

Aquaculture

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Identification of putative genes involved in parasitism in the anchor worm, Lernaea cyprinacea by de novo transcriptome analysis

Cited by 4 publications

References 17 publications

Morphology is not a reliable taxonomic tool for the genus Lernaea: molecular data and experimental infection reveal that L. cyprinacea and L. cruciata are conspecific

Morphology is not a reliable taxonomic tool for the genus Lernaea: molecular data and experimental infection reveal that L. cyprinacea and L. cruciata are conspecific

Prevalence of Lernaea cyprinacea Infections in Indian Major Carp at Fish Farms of Bihar, India

Transcriptomic analysis of gene expression in immune pathways in the spleen of Takifugu rubripes after immunization with scuticociliate vaccine

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