Researchers have developed a protocol using environmental DNA (eDNA) to identify aquatic plant diversity, making ecological biodiversity surveys of these plant communities faster and less expensive. Their study on pondweeds -- an important bioindicator of aquatic ecosystem health -- allows researchers to overcome difficulties in monitoring and identification, and draw conclusions regarding plant diversity and water quality. eDNA is a rapidly emerging technique, but its use in aquatic habitats has been understudied.
Bacteria -- especially Gram-negative strains -- are becoming increasingly resistant to current antibiotic drugs, and the development of new classes of antibiotics has slowed. Faced with these challenges, investigators are studying the potential of combination therapy, in which two or more drugs are used together to increase or restore the efficacy of both drugs against a resistant bacterial pathogen. Now new research indicates that such synergy may work even when bacteria become resistant to colistin, which is considered a treatment agent of last resort.