
Guilherme L WerneckRio de Janeiro State University | UERJ · Departamento de Epidemiologia
Guilherme L Werneck
MD, MSc, DSc
About
380
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Introduction
Additional affiliations
January 2003 - October 2015
September 2012 - present
January 2007 - December 2009
Publications
Publications (380)
Background
Human visceral leishmaniasis (VL) is a systemic disease with high case-fatality rates and a widespread distribution. Continuous evaluation of the risk factors for VL is essential to ensure the effective implementation of prevention and control measures. The present study reviews the factors associated with VL in the Americas.
Methods
Th...
Background: The management of precarious work of delivery workers (DW) by delivery platform companies (DPC)
incorporates technologies that deepen the subordination of this workforce. The demands placed on DW to carry out
their tasks can compromise their health.
Objective: To analyze the contradictory demands of work subordinated to DPC and their re...
Tuberculosis (TB) is the leading infectious disease cause of death worldwide. In recent years, stringent measures to contain the spread of SARS-CoV-2 have led to considerable disruptions of healthcare services for TB in many countries. The extent to which these measures have affected TB testing, treatment initiation and outcomes has not been compre...
Background
Visceral leishmaniasis (VL) is a neglected disease endemic to many tropical and subtropical countries. In Brazil, VL is caused by the protozoan parasite Leishmania infantum and is transmitted by the sand fly Lutzomyia longipalpis. The geographical variation in the incidence of the disease in certain urban areas of Brazil suggests a possi...
Understanding the distribution of tegumentary leishmaniasis (TL) in different periods enables the adequate conduction of actions at the public health level. The present study analyzes the spatiotemporal evolution of TL incidence rates in the municipalities of Brazil and identifies priority areas from 2001 to 2020. Notifications of new cases were an...
O Ministério da Saúde (MS), por meio da Secretaria de Vigilância em Saúde e Ambiente (SVSA), apresenta a mais nova edição do Saúde Brasil, uma publicação que objetiva discutir cenários relevantes para a saúde pública brasileira. O livro é tradicionalmente construído por profissionais de diferentes áreas do MS em conjunto com especialistas vinculado...
Brazil was heavily affected by COVID-19 both with death toll and economically, with absence of a centralized Federal Government response. Tuberculosis (TB) notifications decreased in 2020 but partial recovery was observed in 2021. We have previously shown a sharp (93%) reduction in TB preventive treatment notifications among five Brazilian cities w...
Tuberculosis (TB) is the leading infectious disease cause of death worldwide. In recent years, stringent measures to contain the spread of SARS-CoV-2 have led to considerable disruptions of healthcare services for TB in many countries. The extent to which these measures have affected TB testing, treatment initiation and outcomes has not been compre...
Background : To evaluate the influence of previous physical activity (PA) during childhood, adolescence, and current PA practice on the production of antibodies and inflammatory response between the first and second doses of the COVID-19 vaccine. Methods : Fifty-nine men and 56 women were evaluated before the first vaccine, and 12 weeks later, bloo...
OBJECTIVE
To describe the methodological challenges and strategies of a web survey on the working conditions and health among delivery workers.
METHODS
The study population consisted of Brazilian delivery workers operating in the national territory. Procedures include building solid and ongoing collaboration with worker representatives and conduct...
A dengue evoluiu de uma doença restrita a alguns países para um grave problema global de saúde pública, atingindo mais de 120 países nos últimos anos. No Brasil, após sua reintrodução em 1981, o país enfrentou diversas epidemias, com mais de 16 milhões de casos registrados até o momento. Em 2023, sob a vigência do fenômeno climático El Niño registr...
BACKGROUND
In Brazil, transmission of visceral and cutaneous leishmaniasis has expanded geographically over the last decades, with both clinical forms occurring simultaneously in the same area.
OBJECTIVES
This study characterised the clinical, spatial, and temporal distribution, and performed entomological surveillance and natural infection analys...
Background: In Brazil, human visceral leishmaniasis (HVL) is caused by the protozoan parasite Leishmania infantum, primarily transmitted by the sand fly Lutzomyia longipalpis, with dogs acting as the main urban reservoir. This study aims to evaluate the effectiveness of 4% deltamethrin-impregnated dog collars (DMC) on HVL incidence. Methods: This i...
Introduction
Despite the high prevalence of sickle cell disease (SCD) in Brazil, no studies have described the validation of an SCD‐specific health‐related quality‐of‐life (HRQoL) instrument in children. We validated PedsQL 3.0 Sickle Cell Disease Module (PedsQL‐SCD) for Brazilian Portuguese, and cross‐validated it with PedsQL 4.0 Generic Core Scal...
Facing the decline in vaccine coverage observed since 2016, the new Brazilian government committed to reversing this scenario. To achieve this, the Federal Government launched the National Vaccination Movement and the 'Health with Science' platform to combat vaccine misinformation, promoted Microplanning, providing tools for decision-making at the...
Aims
This study describes the spatio‐temporal dynamics of new visceral leishmaniasis (VL) cases notified in Brazil between 2001 and 2020.
Methods and Results
Data on the occurrence of the disease were obtained by means of the Notifiable Diseases Information System of the Brazilian Ministry of Health. Joinpoint, temporal generalized additive models...
Resumo Objetivo: analisar a associação entre infecção prévia por Chikungunya e sintomas depressivos em trabalhadores da saúde. Métodos: estudo transversal com amostra probabilística de trabalhadores atuantes na atenção primária e na média complexidade de um município do estado da Bahia, Brasil. Utilizou-se o teste rápido DPP-ZDC-IgM/IgG para identi...
Objective: to analyze the association between previous Chikungunya infection and depressive symptoms among healthcare workers. Methods: a cross-sectional study with a probabilistic sample of healthcare workers in primary and medium-complexity care settings in a municipality in the state of Bahia, Brazil. We used the rapid test DPP-ZDC-IgM/IgG to id...
COVID-19 vaccination during pregnancy is safe and effective in reducing the risk of complications. However, the uptake is still below targets worldwide. This study aimed to explore the factors associated with COVID-19 vaccination uptake among pregnant women since data on this topic is scarce in low-to-middle-income countries. A retrospective cohort...
Resumo
O Brasil é um dos 30 países com maior incidência de tuberculose (TB). Pessoas em situação de rua (PSR) têm 56 vezes mais riscos para o adoecimento do que a população geral por terem menor renda e acesso à saúde. Os objetivos do estudo foram apresentar o perfil sociodemográfico e epidemiológico de PSR notificadas para TB entre 2015 e 2019 na...
Background:
COVID-19 vaccines have been shown to protect pregnant individuals against mild and severe COVID-19 outcomes. However, limited safety data are available for inactivated (CoronaVac) and mRNA (BNT162b2) vaccines during pregnancy regarding their effect on birth outcomes and neonatal mortality, especially in low- and middle-income countries...
Objective: to estimate the seroprevalence of arboviruses, syphilis, HIV, and hepatitis B (HBV) in Healthcare Workers (HCW). Methods: a survey among HCW among was randomly selected in a city in Bahia-Brazil. The research used a structured questionnaire, which collected sociodemographic, occupational, and health information in 2019. Rapid immunochrom...
Dogs play an important role in transmission of Leishmania infantum, but epidemiologic and clinical studies of canine tegumentary leishmaniasis (CTL) are scarce. In an endemic area of human American tegumentary leishmaniasis (ATL) caused by Leishmania braziliensis, we determine the prevalence and incidence of both CTL and subclinical (SC) L. brazili...
Resumo Objetivo: estimar soroprevalências de arboviroses, sífilis, HIV e Hepatite B (VHB) em trabalhadores de saúde (TS). Métodos: inquérito entre TS selecionados por amostragem aleatória, em uma cidade da Bahia - Brasil. Pesquisa realizada em 2019 por meio de questionário estruturado, que coletou informações sociodemográficas, ocupacionais e de sa...
Background
Indigenous people have historically suffered devastating impacts from epidemics and continue to have lower access to healthcare and be especially vulnerable to respiratory infections. We estimated the coverage and effectiveness of Covid-19 vaccines against laboratory-confirmed Covid-19 cases among indigenous people in Brazil.
Methods
We...
Dogs play an important role in the transmission of Leishmania infantum but epidemiologic and clinical studies of canine tegumentary leishmaniasis (CTL) are scarce. In an endemic area of human American Tegumentary Leishmaniasis (ATL) caused by Leishmania braziliensis, we determine the prevalence and incidence of both CTL and subclinical (SC) L. braz...
Background
Tegumentary leishmaniasis (TL) is a significant public health issue in Brazil. The present ecological study describes the clinical and epidemiological characteristics of TL cases reported in the country, and analyzes the spatial and temporal patterns of the incidences and risks of occurrence across the five geopolitical regions and 27 fe...
[This corrects the article DOI: 10.1016/j.lana.2023.100496.].
One Health (OH) and Global Health (GH) are interconnected perspectives that may contribute to subsidizing GH policies. This scoping review aims to map the volume, nature, and characteristics of studies focused on the interface of OH and GH concepts. We used PubMed (MEDLINE), Embase, Scopus, and The Virtual Health Library (BVS) as the literature dat...
Background:
Despite the importance of social determinants of health, studies on the effects of socioeconomic, sanitary, and housing conditions on Indigenous child health are scarce worldwide. This study aims to identify patterns in housing, water & sanitation, and wealth (HSW) in the first Indigenous birth cohort in Brazil-The Guarani Birth Cohort...
[This corrects the article DOI: 10.1371/journal.pntd.0011064.].
Among the emerging and reemerging arboviral diseases, Zika, dengue and chikungunya deserve special attention due to their wide geographical distribution and clinical severity. The three arboviruses are transmitted by the same vector and can present similar clinical syndromes, bringing challenges to their identification and register. Demographic cha...
Background:
Brazil started the COVID-19 mass vaccination in January 2021 with CoronaVac and ChAdOx1, followed by BNT162b2 and Ad26.COV2.S vaccines. By the end of 2021, more than 317 million vaccine doses were administered in the adult population. This study aimed at estimating the effectiveness of the primary series of COVID-19 vaccination and boo...
Visceral leishmaniasis (VL) is a pressing public health problem in Brazil. The proper implementation of disease control programs in priority areas is a challenge for healthcare managers. The present study aimed to analyze the spatio-temporal distribution and identify high risk areas of VL occurrence in the Brazilian territory. We analyzed data rega...
Dogs living in areas of Leishmania (Viannia) braziliensis transmission may present canine tegumentary leishmaniasis (CTL) characterized by cutaneous or muzzle ulcers as well as asymptomatic L. braziliensis infection. It is not clear if dogs participate in the transmission chain of L. braziliensis to humans. However, dogs may remain with chronic ulc...
Background:
Disruptions in tuberculosis services have been reported around the world since the emergence of the COVID-19 pandemic. However, the pandemic's effect on tuberculosis preventive treatment (TPT) has been poorly explored. We compared TPT-notified prescriptions and outcomes before and during the pandemic in Brazil.
Methods:
Retrospective...
Causal directed acyclic graphs (DAG) are known to constitute a useful tool to improve the methodological and reporting quality of observational studies. At the same time, there are concerns that their (mis)use may lead to overconfident inferences. In this study, we investigate the reporting of study bias and limitations, and the use of hedging in a...
Background
Indigenous people have historically suffered devastating impacts from epidemics and continue to have lower access to healthcare and be especially vulnerable to respiratory infectious. We estimated the coverage and effectiveness of Covid-19 vaccines against laboratory-confirmed Covid-19 cases among indigenous people in Brazil.
Methods
We...
Introduction:
Bacillus Calmette-Guérin (BCG) vaccine was considered as a tool against SARS-CoV-2 based on the concept of trained immunity, which could be useful against emerging pathogens.
Methods:
A multicenter double-blinded randomized clinical trial recruited health care workers (HCW) in Brazil. The incidence rates of COVID-19, clinical manif...
Background
Brazil and Scotland have used mRNA boosters in their respective populations since September 2021, with Omicron’s emergence accelerating their booster program. Despite this, both countries have reported substantial recent increases in Coronavirus Disease 2019 (COVID-19) cases. The duration of the protection conferred by the booster dose a...
A pandemia de Covid-19 provocou modificações substanciais em diversas esferas da vida acadêmica. A Epidemiologia pode utilizar as experiências acumuladas nesse período como oportunidade para planejar seu futuro. O enfrentamento de uma pandemia exige a produção de teorias explicativas sobre o processo pandêmico e sua expressão desigual na população....
The Covid-19 pandemic has caused substantial changes in various spheres of academic life. Epidemiology can use the experiences accumulated in this period as an opportunity to plan for its future. Facing a pandemic requires the production of explanatory theories about the pandemic process and its unequal manifestation in the population. In this sens...
Background
A nationwide Severe Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) vaccination campaign was initiated in Brazil in January 2021 with CoronaVac (Sinovac Biotech) and ChAdOx1 nCoV-19 (AstraZeneca) followed by BNT162b2 mRNA (Pfizer–BioNTech) and Ad26.COV2.S (Johnson & Johnson–Janssen) vaccines. Here we provide estimates of the number of se...
Introduction: Vaccine hesitancy has been implicated in the low-vaccination coverage in several countries. Knowledge about vaccine hesitancy predictors in health workers is essential because they play a central role in communication about the importance and safety of vaccines. This study aimed to assess beliefs and sociodemographic and occupational...
Data recently reported by our group indicate that stimulation with a pool of immunogens capable of eliciting type 2 immune responses can restore the cognitive and behavioral dysfunctions recorded after a single episode of non-severe rodent malaria caused by Plasmodium berghei ANKA. Here we explored the hypothesis that isolated immunization with one...
Background
How the prefrontal cortex (PFC) recovers its functionality following lesions remains a conundrum. Recent work has uncovered the importance of transient low-frequency oscillatory activity (LFO; < 4 Hz) for the recovery of an injured brain. We aimed to determine whether persistent cortical oscillatory dynamics contribute to brain capabilit...
There are gaps in the knowledge of the factors associated with canine visceral leishmaniasis (CVL). Moreover, there is a need for studies conducted with appropriate sample selection and with standardized diagnostic methods, to assess the current infection status of animals. This study analyzed factors associated with Leishmania infantum infection i...
We analyzed epidemiologic characteristics and distribution of 492 deaths related to Chagas disease and coronavirus disease (COVID-19) co-infection in Brazil during March‒December 2020. Cumulative co-infected death rates were highest among advanced age groups, persons of Afro-Brazilian ethnicity and with low education levels, and geographically dist...
Although severe COVID-19 in children is rare, they may develop multisystem inflammatory syndrome, long-COVID and downstream effects of COVID-19, including social isolation and disruption of education. Data on the effectiveness of the CoronaVac vaccine is scarce during the Omicron period. In Brazil, children between 6 to 11 years are eligible to rec...
Background
Little is known about vaccine effectiveness over time among adolescents, especially against the SARS-CoV-2 omicron (B.1.1.529) variant. This study assessed the associations between time since two-dose vaccination with BNT162b2 and the occurrence of symptomatic SARS-CoV-2 infection and severe COVID-19 among adolescents in Brazil and Scotl...
Background
There is consistent evidence that SARS-CoV-2 vaccines have statistical and clinical significant efficacy to prevent incident and severe cases of COVID-19, although different outcomes were analyzed and different risk reductions were observed. However, randomized control trials (RCT) were not designed or powered to assess whether the vacci...
To date, no information has been published on the effectiveness of inactivated whole-virus COVID-19 vaccines plus heterologous booster against symptomatic infection and severe outcomes (hospitalization or death) during the dominance of the SARS-CoV-2 Omicron variant period. We evaluated the vaccine effectiveness (VE) of CoronaVac plus BNT162b2 boos...
The leishmaniases are vector-borne diseases caused by protozoan parasites of the genus Leishmania and transmitted by the bite of female phlebotomine sand flies. In the Americas, the transmission cycle is primarily zoonotic both for American cutaneous leishmaniasis (ACL) endemic in 18 countries and American visceral leishmaniasis (AVL) endemic to 13...
Background
The Zika virus (ZIKV) epidemic hit Brazil in 2015 and resulted in a generation of children at risk of congenital Zika syndrome (CZS). The social vulnerability of certain segments of the population contributed to the disproportional occurrence of CZS in the Brazilian Northeast, the poorest region in the country. Living conditions are esse...
Compared to previous variants, the SARS-CoV-2 B.1.1.529 (Omicron) variant has relatively high infection rates, including among children. Even though severe COVID-19 in children is rare, this group is susceptible to the multisystem inflammatory syndrome in Children (MIS-C), long-COVID and downstream effects of COVID-19, including social isolation an...
Hybrid immunity (infection plus vaccination) provided high protection against infection and severe disease in the periods of delta and gamma variants of concern. However, the protection of hybrid immunity in the Omicron era remains unknown. We performed a test-negative study using Brazilian national databases between January 01 and March 22, 2022,...
Background
More doses of CoronaVac have been administered worldwide than any other COVID-19 vaccine. However, the effectiveness of COVID-19 inactivated vaccines in pregnant women is still unknown. We estimated the vaccine effectiveness (VE) of CoronaVac against symptomatic and severe COVID-19 in pregnant women in Brazil.
Methods
We conducted a tes...
Urban greenness is an element of vital importance for the population quality of life, and forest inventory is considered the most appropriate method for its assessment. Remote sensing has become an attractive alternative for the accomplishment of forest inventory, facilitating urban flora mapping. The present study aimed to identify the main specie...
There is considerable interest in the waning of effectiveness of coronavirus disease 2019 (COVID-19) vaccines and vaccine effectiveness (VE) of booster doses. Using linked national Brazilian databases, we undertook a test-negative design study involving almost 14 million people (~16 million tests) to estimate VE of CoronaVac over time and VE of BNT...