Understanding the Barriers to COVID-19 Vaccine Among Hispanic/Latinx Communities.

OBJECTIVE: COVID-19 disproportionally affected Hispanic/Latinx populations exacerbating systemic health inequities. The pilot study aimed to explore barriers to COVID-19 vaccination across Hispanic/Latinx communities in Southern California. METHODS: Cross-sectional survey of 200 participants to identify common barriers to vaccine hesitancy among Hispanics/Latinx individuals in Southern California utilizing a 14-item survey and questionnaire in English and Spanish. RESULTS: Of the 200 participants that completed questionnaires, 37% identified a knowledge deficit, 8% identified misinformation, and 15% identified additional barriers such as awaiting appointments, immigration status, transportation issues, or religious reasons as barriers to not receiving the COVID-19 vaccine. Wald statistics denoted that household members with COVID-19 infection within the past 3 months saw a medical provider within the last year, wearing a mask in public often, and barriers to vaccination (not knowing enough about the vaccine) predicted vaccine. These variables indicated changes in the likelihood of obtaining vaccination. CONCLUSION: The most crucial factor for increasing vaccination rates was directly reaching out to the community and actively conducting surveys to address the barriers and concerns encountered by Hispanic/Latinx participants.

Biotransformation of 2,4-dinitrotoluene in a phototrophic co-culture of engineered Synechococcus elongatus and Pseudomonas putida.

In contrast to the current paradigm of using microbial mono-cultures in most biotechnological applications, increasing efforts are being directed towards engineering mixed-species consortia to perform functions that are difficult to programme into individual strains. In this work, we developed a synthetic microbial consortium composed of two genetically engineered microbes, a cyanobacterium (Synechococcus elongatus PCC 7942) and a heterotrophic bacterium (Pseudomonas putida EM173). These microbial species specialize in the co-culture: cyanobacteria fix CO2 through photosynthetic metabolism and secrete sufficient carbohydrates to support the growth and active metabolism of P. putida, which has been engineered to consume sucrose and to degrade the environmental pollutant 2,4-dinitrotoluene (2,4-DNT). By encapsulating S. elongatus within a barium-alginate hydrogel, cyanobacterial cells were protected from the toxic effects of 2,4-DNT, enhancing the performance of the co-culture. The synthetic consortium was able to convert 2,4-DNT with light and CO2 as key inputs, and its catalytic performance was stable over time. Furthermore, cycling this synthetic consortium through low nitrogen medium promoted the sucrose-dependent accumulation of polyhydroxyalkanoate, an added-value biopolymer, in the engineered P. putida strain. Altogether, the synthetic consortium displayed the capacity to remediate the industrial pollutant 2,4-DNT while simultaneously synthesizing biopolymers using light and CO2 as the primary inputs.