Tag: Brazil

Long Covid requires a global response centred on equity and dialogue

Abstract:

Long Covid, or Post-Covid Conditions, is a global health problem. Yet we know strikingly little about the different experiences of Long Covid patients cross-nationally. To address this shortcoming, we conducted an online survey of Long Covid patients active on social media in the U.S. (n = 334, October to December 2021) and Brazil (n = 144, January to April 2022). Our analysis of short answer responses indicates patient dissatisfaction with medical care provided for Long Covid in both the U.S. and Brazil. For Long Covid patients in Brazil, there were additional concerns raised about the lack of local expertise about their condition.

Based on these results, we urge policymakers to expand the education of medical professionals in order to raise awareness of Long Covid. Experts in the Global North should also be encouraged to engage in dialogue with patient groups and experts in the Global South, in order to better understand how local contexts shape the experience of Long Covid.

Source: Au L, Capotescu C, Curi A, Gonçalves Leonel da Silva R, Eyal G. Long Covid requires a global response centred on equity and dialogue. Glob Health Action. 2023 Dec 31;16(1):2244757. doi: 10.1080/16549716.2023.2244757. PMID: 37581581; PMCID: PMC10431739. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10431739/ (Full text)

High levels of pro-inflammatory SARS-CoV-2-specific biomarkers revealed by in vitro whole blood cytokine release assay (CRA) in recovered and long-COVID-19 patients

Abstract:

Background: Cytokines induced by SARS-CoV-2 infection play a crucial role in the pathophysiology of COVID-19 and hyperinflammatory responses have been associated with poor clinical outcomes, with progression to severe conditions or long-term subacute complications named as long-COVID-19.

Methods: In this cross-sectional study, we aimed to evaluate a set of antigen-specific inflammatory cytokines in blood from recovered COVID-19 individuals or who suffered a post-acute phase of SARS-CoV-2 infection compared to healthy individuals with no history of COVID-19 exposition or infection. Interferon-gamma (IFN-γ), IFN-γ-induced protein 10 (IP-10), tumor necrosis factor (TNF), IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12, and IL-17A were quantified by multiplex cytometric bead assay and enzyme-linked immunosorbent assay after stimulation of whole blood with recombinant Spike protein from SARS-CoV-2. Additionally, all participants have evaluated for anti-(S) protein-specific IgG antibodies. Clinical specimens were collected within two months of COVID-19 diagnosis.

Results: A total of 47 individuals were enrolled in the study, a median age of 43 years (IQR = 14.5), grouped into healthy individuals with no history of infection or exposure to SARS-CoV-2 (unexposed group; N = 21); and patients from the Health Complex of the Rio de Janeiro State University (UERJ), Brazil, who were SARS-CoV-2 positive by RT-PCR (COVID-19 group)–categorized as recovered COVID-19 (N = 11) or long-COVID-19 (N = 15). All COVID-19 patients presented at least one signal or symptom during the first two weeks of infection. Six patients were hospitalized and required invasive mechanical ventilation.

Our results showed that COVID-19 patients had significantly higher levels of IFN-γ, TNF, IL-1β, IL-2, IL-6, IL-8, and IP-10 than the unexposed group. The long-COVID-19 group has presented significantly high levels of IL-1β and IL-6 compared to unexposed individuals, but not from recovered COVID-19. A principal-component analysis demonstrated 84.3% of the total variance of inflammatory-SARS-CoV-2 response in the first two components, and it was possible to stratify IL-6, TNF, IL-1β, IL-10, and IL-2 as the top-five cytokines which are candidates to discriminate COVID-19 group (including long-COVID-19 subgroup) and healthy unexposed individuals.

Conclusion: We revealed important S protein-specific differential biomarkers in individuals affected by COVID-19, bringing new insights into the inflammatory status or SARS-CoV-2 exposition determination.

Source: Gomes SMR, Brito ACdS, Manfro WFP, Ribeiro-Alves M, Ribeiro RSdA, da Cal MS, et al. (2023) High levels of pro-inflammatory SARS-CoV-2-specific biomarkers revealed by in vitro whole blood cytokine release assay (CRA) in recovered and long-COVID-19 patients. PLoS ONE 18(4): e0283983. https://doi.org/10.1371/journal.pone.0283983 (Full text)

Post-Viral Fatigue Following SARS-CoV-2 Infection during Pregnancy: A Longitudinal Comparative Study

Abstract:

Studies reported post-COVID-19 fatigue in the general population, but not among pregnant women. Our objectives were to determine prevalence, duration, and risk factors of post-viral fatigue among pregnant women with SARS-CoV-2.

This study involved 588 pregnant women with SARS-CoV-2 during pregnancy or delivery in Brazil. Three groups were investigated: G1 (n = 259, symptomatic infection during pregnancy); G2 (n = 131, positive serology at delivery); G3 (n = 198, negative serology at delivery). We applied questionnaires investigating fatigue at determined timepoints after infection for G1, and after delivery for all groups; fatigue prevalence was then determined.

Cox regression was used to estimate hazard ratio (HR) and 95% CI of the risk of remaining with fatigue in G1. Overall fatigue prevalence in G1 at six weeks, three months and six months were 40.6%, 33.6%, and 27.8%, respectively. Cumulative risk of remaining with fatigue increased over time, with HR of 1.69 (95% CI: 0.89-3.20) and 2.43 (95% CI: 1.49-3.95) for women with moderate and severe symptoms, respectively.

Multivariate analysis showed cough and myalgia as independent risk factors in G1. Fatigue prevalence was significantly higher in G1 compared to G2 and G3. Post-viral fatigue prevalence is higher in women infected during pregnancy; fatigue’s risk and duration increased with the severity of infection.

Source: Oliveira AMDSS, Carvalho MA, Nacul L, Cabar FR, Fabri AW, Peres SV, Zaccara TA, O’Boyle S, Alexander N, Takiuti NH, Mayaud P, Brizot ML, Francisco RPV. Post-Viral Fatigue Following SARS-CoV-2 Infection during Pregnancy: A Longitudinal Comparative Study. Int J Environ Res Public Health. 2022 Nov 26;19(23):15735. doi: 10.3390/ijerph192315735. PMID: 36497810; PMCID: PMC9737157. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9737157/ (Full text)

Neuroimaging and the case of chronic fatigue syndrome

Abstract:

This article analyzes the use of neuroimaging in research into chronic fatigue syndrome. It reviews some works published in the 1990 s and investigates a specific aspect of these studies, namely the search for a cerebral abnormality, in the form of an altered activation pattern, which could provide a pattern for diagnosis and treatment of the disease. The understanding of chronic fatigue syndrome as a disease reduced to some cerebral findings is analyzed, arguing in favor of a broader vision of this disease that includes psychosocial elements of the patient’s life as opposed to entirely somatic explanations.

 

Source: Ortega F, Zorzanelli R. Neuroimaging and the case of chronic fatigue syndrome. Cien Saude Colet. 2011 Apr;16(4):2123-32. [Article in Portuguese]http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-81232011000400012&lng=en&nrm=iso&tlng=en (Full article)

 

Comparative epidemiology of chronic fatigue syndrome in Brazilian and British primary care: prevalence and recognition

Abstract:

BACKGROUND: Although fatigue is a ubiquitous symptom across countries, clinical descriptions of chronic fatigue syndrome have arisen from a limited number of high-income countries. This might reflect differences in true prevalence or clinical recognition influenced by sociocultural factors.

AIMS: To compare the prevalence, physician recognition and diagnosis of chronic fatigue syndrome in London and São Paulo.

METHOD: Primary care patients in London (n=2459) and São Paulo (n=3914) were surveyed for the prevalence of chronic fatigue syndrome. Medical records were reviewed for the physician recognition and diagnosis.

RESULTS: The prevalence of chronic fatigue syndrome according to Centers for Disease Control 1994 criteria was comparable in Britain and Brazil: 2.1% v. 1.6% (P=0.20). Medical records review identified 11 diagnosed cases of chronic fatigue syndrome in Britain, but none in Brazil (P<0.001).

CONCLUSIONS: The primary care prevalence of chronic fatigue syndrome was similar in two culturally and economically distinct nations. However, doctors are unlikely to recognise and label chronic fatigue syndrome as a discrete disorder in Brazil. The recognition of this illness rather than the illness itself may be culturally induced.

Comment in: Diagnosing chronic fatigue syndrome. [Br J Psychiatry. 2009]

 

Source: Cho HJ, Menezes PR, Hotopf M, Bhugra D, Wessely S. Comparative epidemiology of chronic fatigue syndrome in Brazilian and British primary care: prevalence and recognition. Br J Psychiatry. 2009 Feb;194(2):117-22. doi: 10.1192/bjp.bp.108.051813. http://bjp.rcpsych.org/content/194/2/117.long (Full article)

 

‘Physical or psychological?’- a comparative study of causal attribution for chronic fatigue in Brazilian and British primary care patients

Abstract:

OBJECTIVE: Causal attribution influences symptom experience, help-seeking behaviour and prognosis in chronic fatigue syndrome. We compared causal attribution of patients with unexplained chronic fatigue (UCF) in Brazil and Britain.

METHOD: Primary care attenders in São Paulo (n = 3914) and London (n = 2459) were screened for the presence of UCF. Those with UCF (São Paulo n = 452; London n = 178) were assessed for causal attribution (physical vs. psychosocial), perceived chronicity (i.e. reported duration of fatigue) and disability.

RESULTS: British UCF patients were more likely to attribute their fatigue to physical causes (adjusted odds ratio 1.70, P = 0.037) and perceived their fatigue to be more chronic (adjusted beta 0.15, P = 0.002). There was no significant difference in current disability (adjusted beta -0.01, P = 0.81).

CONCLUSION: Despite similar disability levels, UCF patients in different cultural settings presented different attributions and perceptions about their illness. Sociocultural factors may have an important role in shaping illness attribution and perception around chronic fatigue.

 

Source: Cho HJ, Bhugra D, Wessely S. ‘Physical or psychological?’- a comparative study of causal attribution for chronic fatigue in Brazilian and British primary care patients. Acta Psychiatr Scand. 2008 Jul;118(1):34-41. doi: 10.1111/j.1600-0447.2008.01200.x. Epub 2008 May 22. https://www.ncbi.nlm.nih.gov/pubmed/18498433

 

The awareness of chronic fatigue syndrome: a comparative study in Brazil and the United Kingdom

Abstract:

OBJECTIVE: While in many Western affluent countries there is widespread awareness of chronic fatigue syndrome (CFS), also known as myalgic encephalomyelitis (ME), little is known about the awareness of CFS/ME in low- and middle-income countries. We compared the awareness of CFS in Brazil and the United Kingdom.

METHODS: Recognition and knowledge of CFS were assessed among 120 Brazilian specialist doctors in two major university hospitals using a typical case vignette of CFS. We also surveyed 3914 and 2435 consecutive attenders in Brazilian and British primary care clinics, respectively, concerning their awareness of CFS.

RESULTS: When given a typical case vignette of CFS, only 30.8% [95% confidence interval (CI), 22.7-39.9%] of Brazilian specialist doctors mentioned chronic fatigue or CFS as a possible diagnosis, a proportion substantially lower than that observed in Western affluent countries. Similarly, only 16.2% (95% CI, 15.1-17.4%) of Brazilian primary care attenders were aware of CFS, in contrast to 55.1% (95% CI, 53.1-57.1%) of their British counterparts (P<.001). This difference remained highly significant after controlling for patients’ sociodemographic and socioeconomic characteristics (P<.001).

CONCLUSIONS: The awareness of CFS was substantially lower in Brazil than the United Kingdom. The observed difference may influence patients’ help-seeking behavior and both doctors’ and patients’ beliefs and attitudes in relation to fatigue-related syndromes. Attempts to promote the awareness of CFS should be considered in Brazil, but careful plans are required to ensure the delivery of sound evidence-based information.

 

Source: Cho HJ, Menezes PR, Bhugra D, Wessely S. The awareness of chronic fatigue syndrome: a comparative study in Brazil and the United Kingdom. J Psychosom Res. 2008 Apr;64(4):351-5. doi: 10.1016/j.jpsychores.2007.12.006. https://www.ncbi.nlm.nih.gov/pubmed/18374733