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Title

Rifampicin treatment of Blattella germanica evidences a fecal transmission route of their gut microbiota

AuthorsRosas, Tania; García-Ferris, Carlos; Domínguez-Santos, Rebeca; Llop, Pablo; Latorre, Amparo; Moya, Andrés
KeywordsAntibiotic treatment
Microbiota transmission
Endosymbiont
Gut microbiota
Insect symbiosis
Issue Date2018
PublisherOxford University Press
CitationFEMS Microbiology Ecology 94(2): fiy002 (2018)
AbstractEukaryotes have established symbiotic relationship with microorganisms, which enables them to accomplish functions that they cannot perform alone. In the German cockroach, Blattella germanica, the obligate endosymbiont Blattabacterium coexists with a rich gut microbiota. The transmission of Blattabacterium is vertical, but little is known about how the gut microbiota colonizes newborn individuals. In this study, we treated B. germanica populations with rifampicin, a broad-spectrum antibiotic, during two generations and analyzed gut bacterial composition and the Blattabacterium load in control and rifampicin-treated populations. Rifampicin exerted a drastic effect on gut microbiota composition, which recovered in the second generation in the case where the antibiotic was not added to the diet. Furthermore, we observed that bacterial species present in the diet, and particularly in the feces, contribute significantly to establishing the gut microbiota. Finally, the Blattabacterium population remained unaffected by the antibiotic treatment of adults during the first generation but was strongly reduced in the second generation, suggesting that this intracellular symbiont is sensitive to rifampicin only during the infection of the mature oocytes, when it is in an extracellular stage.
Publisher version (URL)https://doi.org/10.1093/femsec/fiy002
URIhttp://hdl.handle.net/10261/184466
DOI10.1093/femsec/fiy002
ISSN0168-6496
E-ISSN1574-6941
Appears in Collections:(I2SysBio) Artículos
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