Molecular and ultrastructural characterization of Andreanna caspii n. gen., n. sp. (Microsporida: Amblyosporidae), a parasite of Ochlerotatus caspius (Diptera: Culicidae)

Simakova, Anastasia V.; Vossbrinck, Charles R.; Andreadis, Theodore G.

doi:10.1016/j.jip.2008.07.004

Cited by 18 publications

(7 citation statements)

References 21 publications

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“…In the absence of genetic recombination the global E. bieneusi population could be viewed as a collection of clonally reproducing genotypes which can be adequately characterized with a single marker. However, evidence of meiotic recombination in other microsporidia, such as Kneallhazia solenopsae , a parasite of fire ants (Sokolova and Fuxa, 2008), Andreanna caspii , a mosquito parasite (Simakova et al, 2008), and Vairimorpha , parasites of Lepidoptera (Jouvenaz and Ellis, 1986), indicates that sexual recombination in E. bieneusi should be investigated. The fact that sex is widespread among fungi supports this argument.…”

Section: Discussionmentioning

confidence: 99%

Host-specific segregation of ribosomal nucleotide sequence diversity in the microsporidian Enterocytozoon bieneusi

Widmer

Akiyoshi

2010

Infection, Genetics and Evolution

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Enterocytozoon bieneusi is a unicellular enteric fungal pathogen and the most common cause of human microsporidiosis. The frequent detection of this organism in animals, including companion animals, livestock and wildlife, has raised the question of the importance of animal reservoirs in the epidemiology of this pathogen. A partial sequence of the ribosomal internal transcribed spacer (ITS) has been widely used as a genetic marker for studying the molecular epidemiology of E. bieneusi. With the aim of comparing E. bieneusi ITS genotypes originating from different host species, and assess the potential for zoonotic transmission, E. bieneusi ITS sequences retrieved from GenBank were analyzed using two metrics of diversity, rarefaction and phylogenetic distance. In spite of the human ITS sample being geographically more diverse, ITS sequence diversity in animals exceeded that of humans. In both host groups much of the ITS diversity remains to be sampled. Using quantitative phylogenetic tests we found evidence for a partial but significant segregation of E. bieneusi ITS sequences according to host species. Host-specific segregation was confirmed by hierarchical analysis of molecular variation. To improve our understanding of the epidemiology of human microsporidiosis and strengthen the study of E. bieneusi populations, efforts to genotype additional E. bieneusi isolates from wildlife and companion animals should be prioritized and the geographic and species diversify of animal samples should be increased. Due to the possibility of genetic recombination in this species, additional unlinked genetic markers need to be developed and included in future studies.

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Section: Discussionmentioning

confidence: 99%

Host-specific segregation of ribosomal nucleotide sequence diversity in the microsporidian Enterocytozoon bieneusi

Widmer

Akiyoshi

2010

Infection, Genetics and Evolution

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“…The species composition of Microsporidia was studied using standard procedures of light and electron microscopies as well as molecular genetic tools [4,9].…”

Section: Methodsmentioning

confidence: 99%

“…These parasites are the most diverse in the mosquitoes belonging to the genus Aedes Meigen. Currently, 14 genera and over 100 species of microsporidians in these mosquitoes have been described, being the largest number as compared with other mosquito genera [1][2][3][4][5][6]. Representatives of some genera of these parasites have complex mono-, di-, tri, and tetramorphic life cycles with changing hosts.…”

Section: Introductionmentioning

confidence: 99%

Ecological aspects of microsporidia parasitizing in natural populations of the Aedes (Diptera: Culicidae) blood-suking mosquitoes in Western Siberia

Simakova¹,

Pankova²,

Issi³

et al. 2016

Tomsk State University Journal of Biology

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We examined microsporidia (1976-2014) in natural populations of blood-sucking Aedes mosquitoes of Western Siberia with the focus on their biodiversity and ecology. In total, we recorded 31 species of Culicidae family mosquitoes in Western Siberia; 22 species of them belong to the univoltine genus Aedes, producing one generation per year (spring). As it has been shown, microsporidians infect 13 mosquito species. In this study, we isolated 26 microsporidian species representing five genera (Amblyospora, Andreanna, Dimeiospora, Novothelohania, and Trichoctosporea) from mosquitoes; of them, the Amblyospora species were the most abundant. The majority of species display a high level of host specificity. Microsporidians are found in all types of aquatic habitats; however, the highest diversity of parasites was observed in mainland temporary ponds. During the period of study, the prevalence rates of microsporidians infecting Aedes mosquitoes varied from 0.05 to100%, with the maximal parasite prevalence during mass mosquito pupation and imago emergence (mid-May-beginning of June). Low parasite loads (0.05-6.5%) are characteristic of the last 20 years.

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“…In unicellular eukaryotes, this process is typically inferred from microscope observations (i.e., fusion of haploid cells or meiotic processes), but it has rarely been observed in microsporidia and has involved a few evolutionarily distant species (81,84,85). For this reason, it is still unclear whether sexual reproduction is rare, complex, or merely difficult to identify in this parasitic lineage.…”

Section: Sex and The Microsporidiamentioning

confidence: 99%

Microsporidia: Eukaryotic Intracellular Parasites Shaped by Gene Loss and Horizontal Gene Transfers

Corradi

2015

Annu. Rev. Microbiol.

120

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Microsporidia are eukaryotic parasites of many animals that appear to have adapted to an obligate intracellular lifestyle by modifying the morphology and content of their cells. Living inside other cells, they have lost many, or all, metabolic functions, resulting in genomes that are always gene poor and often very small. The minute content of microsporidian genomes led many to assume that these parasites are biochemically static and uninteresting. However, recent studies have demonstrated that these organisms can be surprisingly complex and dynamic. In this review I detail the most significant recent advances in microsporidian genomics and discuss how these have affected our understanding of many biological aspects of these peculiar eukaryotic intracellular pathogens.

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Molecular and ultrastructural characterization of Andreanna caspii n. gen., n. sp. (Microsporida: Amblyosporidae), a parasite of Ochlerotatus caspius (Diptera: Culicidae)

Cited by 18 publications

References 21 publications

Host-specific segregation of ribosomal nucleotide sequence diversity in the microsporidian Enterocytozoon bieneusi

Host-specific segregation of ribosomal nucleotide sequence diversity in the microsporidian Enterocytozoon bieneusi

Ecological aspects of microsporidia parasitizing in natural populations of the Aedes (Diptera: Culicidae) blood-suking mosquitoes in Western Siberia

Microsporidia: Eukaryotic Intracellular Parasites Shaped by Gene Loss and Horizontal Gene Transfers

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