AIMS: The aim of this study was to investigate Candida biofilm growth morphology, its biomass, metabolic activity, and to determine the effects of AbA on the biofilm growth.
METHODS: The biofilm forming ability of several clinical isolates of different Candida species from our culture collection was determined using established methods (crystal violet and XTT assays). The determination of AbA planktonic and biofilm MICs was performed based on a micro-broth dilution method. The anti-biofilm effect of AbA on Candida albicans was examined using field emission scanning electron microscope (FESEM) analysis.
RESULTS: A total of 35 (29.7%) of 118 Candida isolates were regarded as biofilm producers in this study. Candida parapsilosis was the largest producer, followed by Candida tropicalis and C. albicans. Two morphological variants of biofilms were identified in our isolates, with 48.6% of the isolates showing mainly yeast and pseudohyphae-like structures, while the remaining ones were predominantly filamentous forms. The biofilm producers were divided into two populations (low and high), based on the ability in producing biomass and their metabolic activity. Candida isolates with filamentous growth, higher biomass and metabolic activity showed lower AbA MIC50 (at least fourfold), compared to those exhibiting yeast morphology, and lower biomass and metabolic activity. The observation of filament detachment and the almost complete removal of biofilm from AbA-treated C. albicans biofilm in FESEM analysis suggests an anti-biofilm effect of AbA.
CONCLUSIONS: The variability in the growth characteristics of Candida biofilm cultures affects susceptibility to AbA, with higher susceptibility noted in biofilm cultures exhibiting filamentous form and high biomass/metabolic activity.
METHODS: We performed a systematic review that examined household food insecurity among the undernourished under-five children. PubMed, Cochrane, EBSCO Host, Web of Science and Cumulative Index to Nursing and Allied Health Literature were searched from 1 January 2012 to 1 April 2022, for relevant articles. Outcome measures were stunting, underweight or wasting. Of the 2779 abstracts screened, 36 studies that fulfilled the inclusion and exclusion criteria were included. A range of tools had been used to measure HFIS, the most common being Household Food Insecurity Access Scale. HFIS has been found to be significantly associated with undernutrition, particularly stunting and underweight. This is observed proportionately across all national income levels.
CONCLUSIONS: Sustainable and inclusive economic growth, which aims to reduce income, education and gender inequality, should be a key policy goal in the minimizing food insecurity and childhood undernutrition. Multisectoral interventions are needed to address these issues.