Desulfoluna spp. form a cosmopolitan group of anaerobic dehalogenating bacteria widely distributed in marine sponges.

Host-specific microbial communities thrive within sponge tissues and this association between sponge and associated microbiota may be driven by the organohalogen chemistry of the sponge animal. Several sponge species produce diverse organobromine secondary metabolites (e.g. brominated phenolics, indoles, and pyrroles) that may function as a chemical defense against microbial fouling, infection or predation. In this study, anaerobic cultures prepared from marine sponges were amended with 2,6-dibromophenol as the electron acceptor and short chain organic acids as electron donors. We observed reductive dehalogenation from diverse sponge species collected at disparate temperate and tropical waters suggesting that biogenic organohalides appear to enrich for populations of dehalogenating microorganisms in the sponge animal. Further enrichment by successive transfers with 2,6-dibromophenol as the sole electron acceptor demonstrated the presence of dehalogenating bacteria in over 20 sponge species collected from temperate and tropical ecoregions in the Atlantic and Pacific Oceans and the Mediterranean Sea. The enriched dehalogenating strains were closely related to Desulfoluna spongiiphila and Desulfoluna butyratoxydans, suggesting a cosmopolitan association between Desulfoluna spp. and various marine sponges. In vivo reductive dehalogenation in intact sponges was also demonstrated. Organobromide-rich sponges may thus provide a specialized habitat for organohalide-respiring microbes and D. spongiiphila and/or its close relatives are responsible for reductive dehalogenation in geographically widely distributed sponge species.

Translation cost, quality, and adequacy.

PURPOSE: Although the inclusion of non-native-speaking participants in nursing research is important in every country where nursing research takes place, the literature contains little on the method of achieving quality translation while simultaneously addressing cost containment. We describe a process for evaluating translation adequacy and demonstrate its use in comparing procedures for translating data from non-native-speaking interviews. ORGANIZING CONSTRUCT: This work demonstrates a process for establishing, evaluating, and achieving translation adequacy when conducting qualitative research for cross-cultural comparisons. METHODS: In an ethnographic investigation of disability in Mexican American women, we describe a process for obtaining translation adequacy, defined here as the methodological goal whereby the quality of the translated text meets the needs of the specified study. Using a subset of responses transcribed from Spanish audiotapes into Spanish text, the text was subjected to two separate translation processes, which were compared for adequacy based on error rates and accuracy of meaning, as well as for cost. FINDINGS: The process for discriminating translation adequacy was sensitive to differences in certified versus noncertified translators. While the noncertified translation initially appeared to be seven times less expensive than the certified process, auditing and correcting errors in noncertified translations substantially increased cost. No errors were found with the certified translations. CONCLUSIONS: The level of translation adequacy needed for any qualitative study should be considered before beginning the study itself. Based on a predetermined level, translation choices can be assessed using specified methods, which can also lead to greater transparency in the research process. CLINICAL RELEVANCE: An ongoing process to verify translation outcomes including cost, a component minimally discussed in the current literature, is relevant to nurses worldwide. Awareness of expense and quality issues makes greater methodological transparency possible in the design of translation projects and research studies.