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J Eukaryot Microbiol ; 60(6): 601-8, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23869987

RESUMO

Microsporidia are intracellular parasites considered to be ubiquitous in the environment. Yet the true extent of their diversity in soils, sand, and compost remains unclear. We examined microsporidian diversity found in the common urban environments of soil, sand, and compost. We retrieved 22 novel microsporidian sequences and only four from described species. Their distribution was generally restricted to a single site and sample type. Surprisingly, one novel microsporidian showed a wide distribution, and high prevalence, as it was detected in five different compost samples and in soil samples collected over 200 km apart. These results suggest that the majority of Microsporidia appear to have a narrow distribution. Our phylogenetic analysis indicated that the Microsporidia detected in this study include representatives from four of the five major microsporidian groups. Furthermore, the addition of our new sequences calls into question the cohesiveness of microsporidian clade II. These results highlight the importance of increasing our knowledge of microsporidian diversity to better understand the phylogenetic relationships and evolutionary history of this important group of emerging parasites.


Assuntos
Biodiversidade , Microsporídios/classificação , Microsporídios/isolamento & purificação , Microbiologia do Solo , Análise por Conglomerados , DNA Fúngico/química , DNA Fúngico/genética , DNA Ribossômico/química , DNA Ribossômico/genética , Genes de RNAr , Microsporídios/genética , Dados de Sequência Molecular , Noroeste dos Estados Unidos , Filogenia , RNA Fúngico/genética , RNA Ribossômico 18S/genética , Análise de Sequência de DNA , Dióxido de Silício , Solo
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