The Ghanaian government, as part of measures to clean the payroll of «ghost names» introduced a scheme to validate personnel by the
various heads of departments to ensure those
whose names appeared on their vouchers were indeed at post.
In the study, which included a series of laboratory experiments, field surveys and mathematical modeling, the presence of
various species of dragonfly larvae reduced the infections in frogs caused by parasitic flatworms called trematodes, said Val Beasley, professor and
head of the department of veterinary and biomedical sciences, Penn State, who worked with Rohr and
whose research group collaborated with Lucinda Johnson, senior research associate and director of the Center for Water and the Environment, University of Minnesota Duluth, to complete the field study.