Biomass composition of the golden tide pelagic seaweeds Sargassum fluitans and S. natans (morphotypes I and VIII) to inform valorisation pathways

Massive strandings of the pelagic brown algae Sargassum have occurred in the Caribbean, and to a lesser extent, in western Africa, almost every year since 2011. These events have major environmental, health, and economic impacts in the affected countries. Once on the shore, Sargassum is mechanically harvested and disposed of in landfills. Existing commercial applications of other brown algae indicate that the pelagic Sargassum could constitute a valuable feedstock for potential valorisation. However, limited data on the composition of this Sargassum biomass was available to inform on possible application through pyrolysis or enzymatic fractionation of this feedstock. To fill this gap, we conducted a detailed comparative biochemical and elemental analysis of three pelagic Sargassum morphotypes identified so far as forming Atlantic blooms: Sargassum natans I (SnI), S. fluitans III (Sf), and S. natans VIII (SnVIII). Our results showed that SnVIII accumulated a lower quantity of metals and metalloids compared to SnI and Sf, but it contained higher amounts of phenolics and non-cellulosic polysaccharides. SnVIII also had more of the carbon storage compound mannitol. No differences in the content and composition of the cell wall polysaccharide alginate were identified among the three morphotypes. In addition, enzymatic saccharification of SnI produced more sugars compared to SnVIII and Sf. Due to high content of arsenic, the use of pelagic Sargassum is not recommended for nutritional purposes. In addition, low yields of alginate extracted from this biomass, compared with brown algae used for industrial production, limit its use as viable source of commercial alginates. Further work is needed to establish routes for future valorisation of pelagic Sargassum biomass.

Prevalence of hepatitis B in people living with HIV/AIDS in Latin America and the Caribbean: a systematic review and meta-analysis

Background

Hepatitis B virus (HBV) infection is a major cause of chronic liver disease worldwide. In immunocompromised patients, the chronicity rates of HBV infection are higher, but the rates of hepatitis Be antigen (HBeAg) and HBsAg loss and seroconversion to anti-HBe and anti-HBs are lower than those in immunocompetent subjects. This study aimed to evaluate articles on the prevalence of HBsAg in people living with human immunodeficiency virus (HIV) /AIDS (PLWHA) in Latin America and the Caribbean (LAC).

Methods

We searched the PubMed, Latin American and Caribbean Health Sciences, and Embase databases for studies up to November 2016 on infection with HIV and HBV in LAC without period or language restrictions. We did not include case reports, case series, review articles, comments, or studies with a sample size smaller than 100. We also evaluated the quality of the articles using a list of criteria totaling 21 items.

Results

Of the 28 selected articles (n = 18,457) published from 1999 to 2016, 18 studies (64.3%) were from Brazil, 3 (10.7%) were from Argentina, 2 (7.1%) were from Chile, 2 (7.1%) were from Cuba, 1 (3.6%) was from Colombia, 1 (3.6%) was from Venezuela, and 1 (3.6%) was from Jamaica. The mean score for the assessment of the study quality was 11.6 (range: 8–16). The estimated pooled prevalence of HBsAg among PLWHA in the selected studies was 7.0% (95% CI 7.0–7.0%). The pooled prevalence of HBsAg was 8.0% (95% CI 8.0–9.0%) in the studies published from 1999 to 2006 and 6.0% (95% CI 5.0–6.0%) in the studies published during the later timeframe.

Conclusions

The results of this review indicate the need to increase the investment in preventive measures against hepatitis B, particularly when the impact of adequate vaccination in this population is considered. Future studies with larger sample sizes are needed in LAC to determine the true prevalence of hepatitis B throughout the region and to clarify and address the risk factors associated with the acquisition of infection.

Electronic supplementary material

The online version of this article (10.1186/s12879-017-2695-z) contains supplementary material, which is available to authorized users.

Human papillomavirus (HPV) types prevalence in cervical samples of female sex-workers on Curaçao

Sex-workers have an increased risk for high-risk HPV(hrHPV) cervical cancer. On Curaçao, legal and illegal prostitution practice is high and the promiscuous lifestyle is common. We aimed to gain insight in HPV-genotype prevalence in cervical scrapes of female sex workers (FSW) and related risk factors in comparison with women not working in the sex industry. Cervical samples were taken from 76 FSW and 228 non-FSW (NFSW) age matched controls in the period between 2013 and 2015. HPV was detected by GP5+/6+ PCR-EIA followed by genotyping via reverse line-blot. HPV prevalence in FSWs was 25.0% and in NFSWs 29.4% (p = 0.14). NFSW had more often untypable HPV-genotypes (HPV-X:5.3% vs 0.0%; p = 0.042). A trend for statistical difference was observed in HPV prevalence between FSWs from Dominican Republic (42.1%) and FSWs from Colombia (19.2%; p = 0.067). Young age was the only risk factor related to HPV prevalence in FSWs. (Mean age FSW 29.2 y ±7.8 and NFSW 33 y ±6.2) Smoking and drugs consumption were significantly higher among FSW. A significant higher number of women with history of any STD was reported by NFSWs. In addition, >90% of FSW had their previous Pap smear <3 years ago, while >35% NFSW never had a previous Pap smear (p < 0.001).

IN CONCLUSION

no significant difference in HPV prevalence is observed between FSW and NFSW. HPV prevalence in FSW was associated with a lower age. During interviews, FSW seemed more aware about prevention strategies, reported less history of STD's and were more updated with cervical cancer screening, compared to NFSWs.

International trade and the neoliberal diet in Central America and the Dominican Republic: Bringing social inequality to the center of analysis

Scholarship on international trade and health analyzes the effects of trade and investment policies on population exposure to non-nutritious foods. These policies are linked to the nutrition transition, or the dietary shift towards meat and processed foods associated with rising overweight and obesity rates in low- and middle-income countries. We argue for expanding the trade and health literature's focus on population exposure through the concept of the neoliberal diet, which centers subnational social inequality as both an outcome of neoliberal agri-food trade policies and a determinant of dietary change. We develop this perspective through a regional analysis of non-nutritious food availability following the implementation of the Dominican Republic-Central America Free Trade Agreement (CAFTA-DR), together with an extended case study, from the late 1990s to the present, of household expenditure and food price changes in the Dominican Republic, the region's largest food importer. Our analysis demonstrates that low-income consumers face increasing household food expenditures in a context of overall food price inflation, in addition to relatively higher price increases for healthy versus ultraprocessed foods. Neoliberal policies not only contribute to restructuring the availability and pricing of healthy food for low-income consumers, but they also exacerbate social inequality in the food system through corporate-controlled supply chains and farmer displacement. Our findings support policy proposals for socially distributive forms of healthy food production to stem the negative effects of the nutrition transition.

Metastatic Breast Cancer to the Urinary Bladder in the Caribbean

One of the most common cancers amongst women is breast cancer. The most common metastatic sites are the lymph nodes, lungs, liver, and bone. Metastatic spread to the urinary bladder is rare, and this case, as far as we are aware, is the first reported in the Caribbean. This patient developed urinary symptoms 4 years after her diagnosis of breast cancer. CT imaging showed thickening of the bladder wall, and histology confirmed metastatic breast cancer. As imaging modalities and cancer treatment improve, patients live longer with metastatic disease, and we will potentially see more unusual presentations of metastatic disease.

Quality of life of cancer patients living in Trinidad and Tobago

PURPOSE

To determine quality of life (QoL) of cancer patients in The Republic of Trinidad and Tobago using the European Organization for Research and Treatment of Cancer Care Quality of Life Instrument (EORTC QLQ-C30) and examine relationships between QoL and socioeconomic and medical variables.

METHOD

A cross-sectional study, consisting of 480 cancer patients being managed at the National Radiotherapy Centre, was conducted. One-way, multiple analysis of variance (MANOVA) with post hoc testing was used to analyze relationships between socioeconomic and medical variables and scales on the EORTC QLQ-C30. Stepwise linear regression was used to evaluate which independent variables contributed to the global QoL and function scores.

RESULTS

Participants were of mean age 64.1 ± 12.1 years (males) and 56.7 ± 16.6 years (females). Mean values for global QoL and function scales were below 75. Persons in younger age groups had significantly better physical and cognitive function scores (p < 0.05). Males had higher emotional function scores than females (p < 0.05). Persons with higher income and education had better scores on all function scales, except social, and less symptoms (p < 0.05). Persons receiving chemotherapy had more nausea/vomiting, appetite loss, and constipation (p < 0.05).

CONCLUSION

Age, income, education, and cancer treatment were factors most associated with scores on the EORTC QLQ-C30. Further research is required in this population to examine these variables in more depth and explore methods to improve QoL of cancer patients in this population.

Aging with HIV in Latin America and the Caribbean: a Systematic Review

PURPOSE OF REVIEW

With the establishment of antiretroviral treatment (ART) programs in low- and middle-income countries, people with HIV (PWH) in Latin America and the Caribbean (LAC) are living longer, subsequently developing chronic non-communicable diseases (NCDs). Few studies focus on the impact of aging among older LAC PWH. This systematic review aims to fill this information gap and understand the burden of aging with HIV in LAC. We identified peer-reviewed literature published in English, Spanish, or Portuguese from several databases to assess currently available evidence on the burden of aging with HIV in LAC and selected six common NCDs found in older PWH (cardiovascular disease [CVD], bone and musculoskeletal [MSK] disorders, cancer, renal disease, neurocognitive impairment [NCI], and depression).

RECENT FINDINGS

Of the 5942 publications reviewed, only 53 articles were found with populations 40 years and older or age-related findings (27 CVD, 13 NCI or depression, 6 MSK disorders, 4 renal disease, 3 cancer). Most (79%) publications were from Brazil with few longitudinal studies on aging with HIV. Prevalence of illnesses such as CVD, NCI, depression, or osteoporosis varied widely depending on the screening instrument utilized and geographic population surveyed. Age was a significant predictor of comorbidity in nearly all studies. Our results demonstrate the need for longitudinal studies and validated screening instruments appropriate for use among PWH in LAC. Understanding the mechanisms behind aging in HIV and the roles of sociocultural factors and genetic diversity specific to LAC is needed to appropriately manage chronic comorbidities as PWH age.

Disruption to diabetes and hypertension care during the COVID-19 pandemic in Latin America and the Caribbean and mitigation approaches: a scoping review

BACKGROUND

The COVID-19 pandemic disrupted care for non-communicable diseases globally. This study synthesizes evidence on disruptions to primary care, focusing on hypertension and diabetes care and mitigation approaches taken during the pandemic in Latin America and the Caribbean (LAC).

METHODS

We conducted a scoping review, searching nine electronic databases for studies from January 2020 to December 2022 on COVID-19-related primary care disruptions and interventions, including studies on hospital-based interventions given their relevance to the pandemic response in LAC. We adapted the Primary Health Care Performance Initiative framework to develop our search strategy and synthesize data. For studies reporting interventions, we included studies conducted outside of LAC.

RESULTS

Of 33,510 references screened, 388 studies were included (259 reported disruptions in LAC, 61 interventions in LAC, 63 interventions outside LAC, and five interventions from countries within and outside LAC), with three-quarters presenting data from Brazil, Argentina, Mexico, and Peru; few studies focused on rural areas. Additionally, the few studies that adequately quantified care disruptions reported a reduction in hypertension and diabetes control during the pandemic (e.g., hypertension control rate decreased from 68 to 55% in Mexico). Frequently reported causes of disruption included burnout and mental health challenges among healthcare workers (with disproportionate effects by type of worker), reduced medication supplies, and reduced frequency of clinic visits by patients (e.g., due to financial constraints). The most reported interventions included remote care strategies (e.g., smartphone applications, virtual meeting platforms) and mental health programs for healthcare workers. Remote care strategies were deemed feasible for care delivery, triaging, and clinical support for non-physicians. Patients were generally satisfied with telemedicine, whereas providers had mixed perceptions. Robust evidence on the effectiveness of remote care strategies for diabetes and hypertension care was unavailable in LAC.

CONCLUSION

Hypertension and diabetes control appeared to worsen in LAC during the pandemic. Major reported causes of care disruptions were workforce issues, reduced medication supply, and changes in patient perceptions of seeking and receiving primary healthcare. Remote care strategies were feasible for various purposes and were well received by patients. However, the lack of data on intervention effectiveness underscores the importance of strengthening research capacity to generate robust evidence during future pandemics. Developing resilient healthcare systems able to provide care for hypertension and diabetes during future pandemics will depend on investment in the healthcare workforce, medical supply chain, health data and research infrastructure, and technology readiness.

What is post-COVID-19 syndrome? Definition and update

This work addresses the origin and development of post-COVID-19 syndrome, which consists of the persistence of different symptoms over time as a consequence of SARS-CoV-2 infection. Based on a narrative review of the scientific literature, a brief analysis of the new term is made, specifying the conceptual definition, characteristic symptoms, the various implications for people's health, and the responses to specific care measures that have been implemented. It concludes with a wake-up call to the governments of Latin America and the Caribbean in order for care and surveillance to be provided to this public health problem.

An Exploratory Survey on the Care for Ataxic Patients in the American Continents and the Caribbean

Little is known about access of rare disease carriers to health care. To increase this knowledge, the Pan American Hereditary Ataxia Network (PAHAN) conducted an exploratory survey about care for hereditary ataxias in American continents and the Caribbean. A questionnaire was sent to health professionals about the hereditary ataxias identified; access to care; and local teaching and research. The number of ataxics under current care per 100,000 inhabitants was subtracted from the expected overall prevalence of 6/100,000, to estimate the prevalence of uncovered ataxic patients. Local Human Development Indexes (HDI) were used to measure socio-economic factors. Twenty-six sites participated. Twelve sites had very high, 13 had high, and one site had medium HDI. Participants reported on 2239 and 602 patients with spinocerebellar ataxias and recessive forms under current care. The number of patients under current care per inhabitants varied between 0.14 and 12/100,000. The estimated prevalence of uncovered ataxic patients was inversely proportional to HDIs (rho = 0.665, p = 0.003). Access to diagnosis, pre-symptomatic tests, and rehabilitation were associated with HDIs. More and better molecular diagnostic tools, protocols and guidelines, and professional training for ataxia care were the top priorities common to all respondents. Evidence of inequalities was confirmed. Lower HDIs were associated with high potential numbers of uncovered ataxic subjects, and with lack of molecular diagnosis, pre-symptomatic testing, and rehabilitation. More and better diagnostic tools, guidelines, and professional training were priorities to all sites. PAHAN consortium might help with the last two tasks.