Bacteriological analysis of Periplaneta americana L. (Dictyoptera; Blattidae) and Musca domestica L. (Diptera; Muscidae) in ten districts of Tangier, Morocco

In this study, Periplaneta americana and Musca domestica were collected from ten districts in Tangier, to isolate and identify some bacteria from their body using selective media. The results indicate that theamounts of bacteria were different between the districts. Moreover, the bacteria isolated from body of American cockroaches differed from those of the houseflies. These findings show that American cockroaches and houseflies may carry pathogenic bacteria in the urban areas of Tangier

Challenges to determining whether DHA can protect against age-related cognitive decline

DHA, an omega-3 fatty acid, is an important constituent of brain membranes and has a key role in brain development and function. This review aims to highlight recent research on DHA’s role during age-related cognitive decline and Alzheimer’s disease. Animal and in vitro studies have provided some interesting mechanistic leads, especially on brain glucose metabolism, that may be involved in neuroprotection by DHA. However, results from human studies are more mitigated, perhaps due to changing DHA metabolism during aging. Recent innovative tools such as 13C-DHA for metabolic studies and 11C-DHA for PET provide interesting opportunities to study factors that affect DHA homeostasis during aging and to better understand whether and how to use DHA to delay or treat Alzheimer’s disease