ISABEL CRISTINA CHULVIS DO VAL GUIMARÃES

Prof. Dr. ISABEL CRISTINA CHULVIS DO VAL GUIMARÃES


Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2021 in Epidemiologia e Serviços de Saúde
Verified
Journal Article
Open access
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NCNewton Sergio de Carvalho
Newton Sergio de Carvalho
RSRoberto José de Carvalho da Silva
Roberto José de Carvalho da Silva
IGISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
ISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
MBMaria Luiza Bazzo
Maria Luiza Bazzo
MSMariangela Freitas da da Silveira
Mariangela Freitas da da Silveira
Resumo O artigo aborda a infecção pelo papilomavírus humano (human papillomavirus, HPV), tema constitutivo do Protocolo Clínico e Diretrizes Terapêuticas para Atenção Integral às Pessoas com Infecções Sexualmente Transmissíveis, publicado pelo Ministério da Saúde. Tal documento foi elaborado com base em evidências científicas e validado em discussões e consenso entre especialistas. São apresentados aspectos epidemiológicos e clínicos, bem como orientações para os gestores e profissionais de saúde no diagnóstico, tratamento e prevenção da infecção pelo HPV. Este tema representa importante problema de saúde pública, haja vista essa infecção sexualmente transmissível ser a mais prevalente no mundo, capaz de desencadear o processo oncogênico do câncer do colo uterino, além de possibilitar a ocorrência de verrugas anogenitais. Neste artigo, são apresentadas informações importantes para o conhecimento do HPV, estratégias de ação para a prevenção e controle da infecção, uma assistência de qualidade e tratamento efetivo da doença.

1 January 2021 in Revista da Sociedade Brasileira de Medicina Tropical
Verified
Journal Article
Open access
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NCNewton Sergio de Carvalho
Newton Sergio de Carvalho
RSRoberto José de Carvalho da Silva
Roberto José de Carvalho da Silva
IGISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
ISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
MBMaria Luiza Bazzo
Maria Luiza Bazzo
MSMariangela Freitas da da Silveira
Mariangela Freitas da da Silveira
This article addresses human papillomavirus (HPV) infection, one of the topics covered by the Clinical Protocol and Therapeutic Guidelines for Comprehensive Care for People with Sexually Transmitted Infections, published by the Brazilian Ministry of Health. The Protocol and Guidelines have been developed based on scientific evidence and validated in discussions with specialists. This article presents epidemiological and clinical aspects and guidelines for health service managers and health workers about diagnosing and treating people with papillomavirus infection. This theme is a significant public health issue since it is the most prevalent sexually transmitted infection globally, capable of triggering the oncogenic process of cervical cancer and the possibility of anogenital warts. Important information is presented for gaining knowledge about HPV and action strategies for infection prevention and control, provision of quality care, and effective treatment of the disease. Infection by the human papillomavirus is the sexually transmitted infection of the highest contagion, superior to genital herpes and HIV.

29 October 2025 in Vaccines
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Journal Article
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ABAntonio Braga
Antonio Braga
CAROLINE ALVES DE OLIVEIRA MARTINSCAROLINE ALVES DE OLIVEIRA MARTINS
CAROLINE ALVES DE OLIVEIRA MARTINS
Gabriela PaivaGabriela Paiva
Gabriela Paiva
ÉBÉrica de Almeida Barboza
Érica de Almeida Barboza
Marcela ChagasMarcela Chagas
Marcela Chagas
SFSusana Cristina Aidé Viviani Fialho
Susana Cristina Aidé Viviani Fialho
Background: The introduction of prophylactic HPV vaccination has transformed cervical cancer prevention worldwide, yet many low- and middle-income countries face persistent challenges in implementation, coverage gaps, and vaccine hesitancy. This article presents a narrative review of global and Brazilian HPV vaccination programs, highlighting achievements, pitfalls, and lessons for future strategies. Methods: We reviewed peer-reviewed literature and official reports from WHO, PAHO, CDC, Brazilian institutions, and others, focusing on programmatic performance, coverage trends, and vaccine acceptance. Results: In high-income settings such as Australia and the United Kingdom, school-based vaccination programs have driven sharp declines in HPV prevalence, genital warts, and precancerous lesions, in some cases approaching elimination thresholds. The United States has made progress but continues to struggle with disparities in uptake linked to socioeconomic and cultural factors. In India and several African nations, recent evidence supports single-dose regimens as a cost-effective and logistically feasible strategy. In Brazil, HPV vaccination was introduced in 2014 via the National Immunization Program (PNI), initially targeting girls aged 9–13 years through school campaigns. First-dose coverage exceeded 80% in the first year but subsequently declined, with full-schedule completion rates dropping below 60%. Contributing factors include misinformation, weakening of school-based delivery, and pandemic-related disruptions. Brazil later expanded eligibility to boys and immunocompromised populations and, more recently, extended catch-up vaccination to older adolescents. Conclusions: HPV vaccination has the potential to substantially reduce cervical cancer incidence globally. However, sustained impact depends not only on infrastructure and universal access but also on consistent school-based delivery, adaptive policies such as single-dose regimens, and robust communication strategies to counter misinformation. Brazil’s experience offers both inspiration and caution, providing lessons for countries striving to meet the WHO 90-70-90 targets.

29 November 2022 in Revista Brasileira de Ginecologia e Obstetrícia
Verified
Journal Article
Open access
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PCPriscila Loyola Campos
Priscila Loyola Campos
IGISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
ISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
SFSusana Cristina Aidé Viviani Fialho
Susana Cristina Aidé Viviani Fialho
CAROLINE ALVES DE OLIVEIRA MARTINSCAROLINE ALVES DE OLIVEIRA MARTINS
CAROLINE ALVES DE OLIVEIRA MARTINS
FRFabiana Resende Rodrigues
Fabiana Resende Rodrigues
DMDaniela da Silva Alves Monteiro
Daniela da Silva Alves Monteiro
Objective To assess the association between two colposcopic indices, the Swede score and the 2011 International Federation of Cervical Pathology and Colposcopy (IFCPC) Nomenclature as well as to determine the efficacy of the Swede score with cutoffs of 7 and 8. Methods In the present cross-sectional pilot study, 34 women who had at least 1 colposcopy-directed biopsy due to abnormal cytology were enrolled. The colposcopic findings were scored by both the Swede score and the 2011 IFCPC Nomenclature and were compared with each other. The Kappa coefficient and the McNemar test were used. Accuracy, sensitivity, specificity, and positive and negative predictive values (NPV and PPV, respectively) were calculated, as well as the effectiveness with cutoffs of 7 and 8 in identifying cervical intraepithelial neoplasm (CIN) 2+ when using the Swede score. Results The correlation between the 2 colposcopic indices was 79.41%. The Kappa coefficient and the McNemar p-value were 0.55 and 0.37, respectively. The IFCPC Nomenclature had sensitivity, specificity, accuracy, PPV, and NPV of 85.71, 55.00, 67.64, 57.14, and 84.61%, respectively. The Swede score had sensitivity, specificity, accuracy, PPV, and NPV of 100, 63.15, 79.41, 68.18, and 100%, respectively. A Swede score cutoff of 7 for CIN 2+ detection had a specificity of 94.73%, while with a cutoff of 8 it increased to 100%. The sensitivity for both values was 60%. The PPV and NPV for cutoffs of 7 and 8 were 90 and 75 and 100 and 76%, respectively. Conclusion Although both colposcopic indices have good reproducibility, the Swede score showed greater accuracy, sensitivity, and specificity in identifying CIN 2 + , especially when using a cutoff of 8.

21 October 2025 in Revista Brasileira de Ginecologia e Obstetrícia
Verified
Journal Article
Open access
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AZAna Ximena Zunino
Ana Ximena Zunino
PTPriscila de Almeida Torre
Priscila de Almeida Torre
SVSusana Cristina Aidé Viviani
Susana Cristina Aidé Viviani
IGISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
ISABEL CRISTINA CHULVIS DO VAL GUIMARÃES
CAROLINE ALVES DE OLIVEIRA MARTINSCAROLINE ALVES DE OLIVEIRA MARTINS
CAROLINE ALVES DE OLIVEIRA MARTINS
FPFaustino Ramón Pérez-López
Faustino Ramón Pérez-López
Objective: To analyze the vaginal microbiota before and after the treatment with vaginal microablative fractional radiofrequency (FRAXX) and compare it with topical estriol treatment in women with GMS. Methods: Pilot clinical trial, double-blind, randomized, and placebo-controlled. Thirty women diagnosed with SGM were evaluated regarding the vaginal microbiota before and one month after the end […] Abstract Objective: To analyze the vaginal microbiota before and after the treatment with vaginal microablative fractional radiofrequency (FRAXX) and compare it with topical estriol treatment in women with GMS. Methods: Pilot clinical trial, double-blind, randomized, and placebo-controlled. Thirty women diagnosed with SGM were evaluated regarding the vaginal microbiota before and one month after the end […]

22 June 2026 in Diagnostics
Verified
Journal Article
Open access
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ABAntonio Braga
Antonio Braga
GLGustavo Ribeiro Lima
Gustavo Ribeiro Lima
KDKARINE MELLO DUVIVIER
KARINE MELLO DUVIVIER
Edward Araujo JúniorEdward Araujo Júnior
Edward Araujo Júnior
CAROLINE ALVES DE OLIVEIRA MARTINSCAROLINE ALVES DE OLIVEIRA MARTINS
CAROLINE ALVES DE OLIVEIRA MARTINS
SFSusana Cristina Aidé Viviani Fialho
Susana Cristina Aidé Viviani Fialho
Human papillomavirus (HPV) infection is a major driver of anogenital disease and virus-related carcinogenesis. Although most infections resolve spontaneously, persistent infection with high-risk genotypes may progress to high-grade squamous intraepithelial lesions (HSILs) and cancer, particularly in the setting of impaired immune surveillance. Unlike previous HPV-related reviews focused primarily on cervical disease, vaccination, or isolated immunosuppressed populations, this narrative review comparatively examines the clinical expression, colposcopic findings, screening strategies, and therapeutic implications of HPV-related disease across the immunological spectrum. This narrative review provides an integrative synthesis of HPV-related disease in the female lower genital tract across the immunological spectrum. A structured, non-systematic search of PubMed/MEDLINE, Scopus, and Web of Science was conducted using terms related to “human papillomavirus”, “HPV”, “cervical intraepithelial neoplasia”, “colposcopy”, “immunosuppression”, “HIV”, and “vaccination”. Immunosuppressed populations, including individuals living with HIV, transplant recipients, and patients receiving immunosuppressive therapy, exhibit higher rates of persistent infection, multifocal disease, recurrence, and progression to HSIL and invasive malignancy. These patients also present greater diagnostic complexity, broader anatomical involvement, and reduced response to conventional treatment. Rather than representing a uniform condition, HPV-related disease reflects a biologically dynamic spectrum shaped by host immune competence. This review highlights the distinct clinical, colposcopic, and therapeutic challenges observed in immunosuppressed populations and reinforces the need for individualized, risk-adapted strategies integrating contemporary advances in screening, vaccination, and HPV-related disease management.