Colonization dynamics of subgingival microbiota in recently installed dental implants compared to healthy teeth in the same individual: a 6-month prospective observational study

Abstract Objectives To evaluate the colonization dynamics of subgingival microbiota established over six months around newly installed dental implants in periodontally healthy individuals, compared with their corresponding teeth. Methodology Seventeen healthy individuals assigned to receive single dental implants participated in the study. Subgingival biofilm was sampled from all implant sites and contralateral/ antagonist teeth on days 7, 30, 90, and 180 after implant installation. Microbiological analysis was performed using the Checkerboard DNA-DNA hybridization technique for detection of classical oral taxa and non-oral microorganisms. Significant differences were estimated by Mann-Whitney and Friedman tests, while associations between implants/teeth and target species levels were assessed by linear regression analysis (LRA). Significance level was set at 5%. Results Levels of some species were significantly higher in teeth compared to implants, respectively, at day 7 ( V.parvula , 6 × 10 5 vs 3 × 105 ; Milleri streptococci , 2 × 10 6 vs 6 × 10 5 ; Capnocytophaga spp., 2 × 10 6 vs 9 × 10 5 ; E.corrodens , 2 × 10 6 vs 5 × 10 5 ; N. mucosa , 2 × 10 6 vs 5 × 10 5 ; S.noxia , 2 × 10 6 vs 3 × 10 5 ; T.socranskii , 2 × 10 6 vs 5 × 10 5 ; H.alvei , 4 × 10 5 vs 2 × 10 5 ; and Neisseria spp., 6 × 10 5 vs 4 × 10 4 ), day 30 ( V.parvula , 5 × 10 5 vs 10 5 ; Capnocytophaga spp., 1.3 × 10 6 vs 6.8 × 10 4 ; F.periodonticum , 2 × 10 6 vs 10 6 ; S.noxia , 6 × 10 5 vs 2 × 10 5 ; H.alvei , 8 × 10 5 vs 9 × 10 4 ; and Neisseria spp., 2 × 10 5 vs 10 6 ), day 120 ( V.parvula , 8 × 10 5 vs 3 × 10 5 ; S.noxia , 2 × 10 6 vs 0; and T.socranskii , 3 × 10 5 vs 8 × 10 4 ), and day 180 ( S.enterica subsp. enterica serovar Typhi, 8 × 10 6 vs 2 × 10 6 ) (p<0.05). Implants showed significant increases over time in the levels of F.nucleatum , Gemella spp., H.pylori , P.micra , S.aureus , S.liquefaciens , and T.forsythia (p<0.05). LRA found that dental implants were negatively correlated with high levels of S. noxia and V. parvula (β=-0.5 to -0.3; p<0.05). Conclusions Early submucosal microbiota is diverse and only a few species differ between teeth and implants in the same individual. Only 7 days after implant installation, a rich microbiota can be found in the peri-implant site. After six months of evaluation, teeth and implants show similar prevalence and levels of the target species, including known and new periodontopathic species.

HPV infection and endometriosis: a systematic review and meta-analysis / Infecção por HPV e endometriose: uma revisão sistemática e metanálise

Introduction: Recent research has focused on the role of persistent ascending bacterial infections and sexually transmitted infections (STI) as a factor associated to endometriosis. Indeed, some studies investigated the possible role of HPV in endometriosis, but this topic remains inconclusive. Objective:The present study aims to meta-analyze research that assessed the presence of HPV infection in patients with endometriosis. Methods: MEDLINE, Embase, Scopus, LILACS, Cochrane Library, and OpenGrey were searched until February 10th, 2020. Search terms included "endometriosis" and "HPV" without language restrictions. The combined relative risks and 95% confidence interval (95%CI) were calculated, and heterogeneity was assessed with I-square (I2 ). Results: Meta-analysis with low heterogeneity found a relative risk of twice as much in women exposed to HPV in relation to the unexposed control. Conclusion: Results indicate that HPV could be a risk factor for developing endometriosis.

Introdução: A pesquisa recente enfocou o papel de infecções por bactéria ascendente persistente e infecções sexualmente transmissíveis (IST) como um dos fatores associados à endometriose. Na verdade, alguns estudos investigaram o possível papel do HPV na endometriose, mas esse tópico permanece inconclusivo. Objetivo: O presente estudo tem como objetivo fazer uma metanálise de pesquisas que avaliaram a presença de infecção por HPV em pacientes com endometriose. Métodos: As bases de dados MEDLINE, Embase, Scopus, LILACS, Biblioteca Cochrane e OpenGrey foram pesquisadas até 10 de fevereiro de 2020. Os termos de pesquisa incluíram "endometriose" e "HPV" sem restrições de idioma. Os riscos relativos combinados e intervalo de confiança de 95% (IC95%) foram calculados, e a heterogeneidade foi avaliada usando o I-quadrado (I2 ). Resultados: A metanálise com baixa heterogeneidade encontrou um risco relativo duas vezes maior em mulheres expostas ao HPV em relação ao controle não exposto. Conclusão: Os resultados indicam que o HPV pode ser um fator de risco para o desenvolvimento de endometriose.

Microbial profile and endotoxin levels in primary periodontal lesions with secondary endodontic involvement

Abstract This study was carried out to investigate the microbial profile and endotoxin levels of endodontic-periodontal lesions of periodontal origin. Periodontal and endodontic samples were taken from periodontal pockets and necrotic root canals of 10 teeth with endodontic-periodontal lesions. Evidencing of 40 different bacterial species were determined in each endodontic and periodontal sample using the checkerboard DNA-DNA hybridization method and Kinetic chromogenic LAL assay was used for quantification of endotoxins. Fisher's exact test correlated the bacterial species with the endodontic or periodontal microbiota. The endotoxin levels (EU/mL) found in samples of the root canal and periodontal pocket were compared by the Wilcoxon test (p<0.05). Bacteria and LPS units were found in 100% of the endodontic and periodontal samples. The species E. faecium, P. acnes, G. morbillorum, C. sputigena and L. buccalis were strongly correlated with the endodontic microbiota and P. nigrescens with the periodontal microbiota. P. intermedia, P. endodontalis and V. parvula were more prevalent in both endodontic and periodontal microbiots. The endotoxin levels in the periodontal pocket (89600 EU/mL) were significantly higher than in the root canal (2310 EU/mL). It was concluded that the microbiota present in the periodontal and endodontic tissues is similar, with a higher prevalence of species of the orange complex and a higher level of endotoxin in the periodontal pockets.

Resumo Este estudo foi realizado para investigar o perfil microbiano e os níveis de endotoxina de lesões endoperiodontais de origem periodontal. Amostras periodontais e endodônticas foram obtidas de bolsas periodontais e canais radiculares necróticos de 10 dentes com lesões endoperiodontais. A investigação de 40 espécies bacterianas diferentes foram determinadas em cada amostra endodôntica e periodontal usando o método de hibridização de DNA-DNA (checkerboard) e o ensaio cinético cromogênico LAL foi usado para quantificação de endotoxinas. O teste exato de Fisher correlacionou as espécies bacterianas com a microbiota endodôntica ou periodontal. Os níveis de endotoxina (EU/mL) encontrados nas amostras do canal radicular e na bolsa periodontal foram comparados pelo teste de Wilcoxon (p<0,05). Bactérias e unidades de LPS foram encontradas em 100% das amostras endodônticas e periodontais. As espécies E. faecium, P. acnes, G. morbillorum, C. sputigena e L. buccalis foram fortemente correlacionadas com a microbiota endodôntica e P. nigrescens com a microbiota periodontal. P. intermedia, P. endodontalis e V. parvula foram mais prevalentes em ambas microbiotas endodôntica e periodontal. Os níveis de endotoxina na bolsa periodontal (89600 EU/mL) foram significativamente maiores do que no canal radicular (2310 EU/mL). Concluiu-se que a microbiota presente nos tecidos periodontal e endodôntico é semelhante, com maior prevalência de espécies do complexo laranja e maior nível de endotoxina nas bolsas periodontais.

Clinicopathological characteristics of HPV+ oropharyngeal squamous cell carcinoma / 中华病理学杂志

Objective@#To observe the clinicopathologic features of oropharyngeal squamous cell carcinoma associated with human papilloma virus (OPSCC-HPV) and discuss the role and value of different in situ hybridization (ISH) detection methods for HPV in pathologic diagnosis.@*Methods@#Fifteen cases of OPSCC-HPV were collected from Department of Pathology, Beijing Tongren Hospital, Capital Medical University from January 2016 to August 2018. These cases were diagnosed in accordance with the WHO classification of head and neck tumors. The histopathologic features and the clinicopathologic data were retrospectively analyzed. Immunohistochemistry (two-step EnVision method) was done to evaluate the expression of p16, Ki-67 and p53. ISH was used to detect HPV DNA (6/11 and 16/18). RNAscope technology was used to evaluate the presence of HPV mRNAs (16 and 18).@*Results@#The mean age for the 15 patients (8 males, 7 females) was 47 years (range from 30 to 69 years). OPSCC-HPV typically presentedat an advanced clinical stage, six patients had cervical lymphadenopathy (large and cystic), seven had tonsillar swelling, one had tumor at base of tongue, and one had odynophagia. Microscopically the tumors exhibited distinctive non-keratinizing squamous cell carcinoma morphology. Cervical nodal metastases were large and cystic, with thickening of lymph node capsules. OPSCC-HPV raised from crypt epithelium and extended beneath the tonsillar surface epithelial lining as nests and lobules, often with central necrosis. Tumor cells displayed a high N: C ratio, and high mitotic and apoptotic rates. Tumor nests are often embedded within lymphoid stroma, and may be infiltrated by lymphoid cells.Fifteen cases (15/15) were strongly positive for p16; Ki-67 index were 60%-90%; they were focally positive or negative for p53. Ten cases (10/10) were negative for HPV 6/11 DNA, and one case(1/10) was focally positive for HPV16/18 DNA. Eleven cases (11/11) were strongly positive for HPV16 mRNA, one case was focally positive for HPV18 mRNA.@*Conclusions@#OPSCC-HPV is a pathologically and clinically distinct form of head and neck squamous cell carcinoma. OPSCC-HPV is associated with high-risk HPV (type 16) in all cases. Detection of high-risk HPV16 mRNA by RNAscope is of great significance in the final diagnosis and pathogen identification.

Use of HPV testing in cervical cancer screening services in Mexico, 2008-2018: a nationwide database study / Uso de la prueba de VPH para la detección de cáncer cervical en México, 2008-2018: estudio de una base de datos nacional

Abstract: Objective: To describe the methods of a study aimed at evaluating high risk-HPV (hrHPV)-based screening and cervical cytology as triage compared to conventional cervical cytology as primary screening in the detection of grade 2+ cervical intraepithelial neoplasia in the National Cancer Screening Program (NCSP) of Mexico. Materials and methods: We will use information originated from the Womens Cancer Information System of Mexico regarding cervical cancer from 2008 to 2018. The database includes cytology results, diagnostic confirmation by histopathology and/or treatment colposcopy. We will then carry out statistical analyses on approximately 15 million hrHPV. Results: We will evaluate the overall performance of hrHPV-based screening as part of the NCSP and compare hrHPV-based to cytology-based screening under real-life conditions. To guarantee an unbiased comparison between hrHPV with cytology triage and conventional cytology we will use propensity score matching. Conclusion: Decision makers may use our results to identify areas of opportunity for improvement in NCSP processes.

Resumen: Objetivo: Describir los métodos de un estudio que busca comparar el beneficio de la introducción de la prueba de VPH de alto riesgo como prueba primaria frente a la citología convencional para la detección de la neoplasia intraepitelial cervical grado 2 o mayor, dentro del Programa de Prevención y Control del Cáncer de la Mujer, para el periodo de 2008 a 2018. Material y métodos: Se utilizarán los registros del Sistema de Información de Cáncer de la Mujer, se realizarán los análisis estadísticos con aproximadamente 15 millones de resultados de VPH-alto riesgo, además se utilizarán los resultados de citología, colposcopia, histología y los casos referenciados al centro oncológico para tratamiento. Para comparar ambos grupos usaremos "propensity score matching". Resultados: Se evaluará el desempeño general de la prueba de VPH-alto riesgo, en condiciones reales dentro del Programa Nacional de Prevención y Control de la Mujer y su tendencia en el tiempo. Conclusiones: Los resultados de estudio ayudarán a los tomadores de decisiones a identificar áreas de oportunidad para mejorar el programa en México.

High-risk mucosal HPV types associated with squamous cell carcinoma on the nose tip in an immunocompetent young man

Abstract: The oncogenic role of high-risk HPV in anogenital, head and neck, and cervical cancer is well recognized, but not in skin cancer in the general population. Some authors have demonstrated their appearance mainly on the hands and feet, particularly in the area of the nail bed, which could be due to contamination with HPV types from anogenital regions. Here, we describe a case of genital HPV associated with SCC on the nose tip in an immunocompetent young man, which was confirmed by histopathological findings and in situ hybridization. The importance of this report is to highlight the potential role of HPV in the etiology of skin cancer in an immunocompetent individual.

Significance of HPV and cell cycle related proteins in basaloid squamous cell carcinoma of the larynx / 中华病理学杂志

Objective@#To study the significance of HPV and cell cycle related proteins in basaloid squamous cell carcinoma (BSCC) of the larynx.@*Methods@#Twenty-nine cases of laryngeal BSCC from Beijing Tongren Hospital from January 2005 to December 2011 were reviewed. HPV typing by polymerase chain reaction-reverse dot blot (PCR-RDB) and p53, Ki-67, p16, p21 and cyclin D1 expression by immunohistochemistry were performed. The relationship between these indicators, various pathologic parameters (TNM, tumor size, tumor site and lymph node metastasis) and HPV status was analyzed.@*Results@#There were 27 male and 2 female patients. The median age was 62 years. Lymph node metastasis and supraglottic tumor location were slightly higher than that of "usual" SCC, but not statistically significant (P>0.05). HPV DNA was detected in 27.6% (8/29) of the laryngeal BSCC, and all were HPV16. The expression of HPV was not related to age, alcohol consumption, tumor stage and tumor size. p53 was expressed in 31.0%(9/29) of laryngeal BSCC, and these cases were more likely supraglottic and had lymph node metastases (P<0.05). p16 staining was seen in 24.1% (7/29) of laryngeal BSCC, and these cases showed slightly higher rate of lymph node metastasis compared to p16 negative cases. The expression rates of p21 and cyclinD1 were 27.6% (8/29) and 69.0%(20/29), respectively, which were not related to age, tumor size, stage, lymph node metastasis, smoking and drinking. There were only 3 p16+ /HPV+ cases, which showed higher p21 and Ki-67 index compared to the HPV negative group (P<0.05).@*Conclusion@#Some laryngeal BSCC expresses HPV DNA, possibly indicating an association with HPV; but p16 expression is not a reliable indicator for HPV infection.

The diagnostic value of automated quantitative DNA cytometry for pancreatic malignancy / 中华消化内镜杂志

Objective To estimate the diagnostic value of cytology, DNA-ICM(DNA-image cytometry),cytology combined with DNA-ICM for pancreatic malignancy,and to explore the cut-off value for DNA-ICM. Methods Patients with suspicious pancreatic malignancy were retrospectively identified. In total,145 EUS-FNA specimens acquired from 140 separate patients were examined by cytology and DNA-ICM. Diagnostic values among cytology, DNA-ICM and the combination of the techniques in detecting pancreatic malignancy were compared. Results Compared with cytology, DNA-ICM had a lower sensitivity (63.0% VS 82.4%)and accuracy(69.7% VS 85.5%). After combining the techniques, the diagnostic value for pancreatic malignancy significantly improved compared with that by cytology(0.941 VS 0.912, P=0.007 0)or DNA-ICM only(0.941 VS 0.815, P<0.000 1). By using the Youden index, the cut-off value for DNA-ICM to detect pancreatic malignancy was one cell with DI(DNA index)≥2.5. Notably,with this standard, the sensitivity and accuracy of DNA-ICM significantly increased to 72.3% and 77.2%, and those of the combined techniques increased to 91.6% and 93.1%, respectively. Conclusion Automated DNA-ICM is an objective and effective method for pancreatic malignancy. Although DNA-ICM has a lower diagnostic value than that of conventional cytology, an improved value was obtained after combining the techniques.

Achados citológicos em pacientes com captura híbrida positiva para papilomavírus humano em um laboratório de patologia de Criciúma / Citologic findings in patients with positive hybrid capture for human papillomavirus in a pathology laboratory in Criciúma

A infecção pelo HPV é a infecção sexualmente transmissível mais comum no mundo e está intimamente relacionada ao câncer de colo uterino. Acomete mulheres jovens sexualmente ativas com incidência de aproximadamente 25 a 45%. O objetivo do trabalho é conhecer os achados citológicos em pacientes com captura híbrida positiva para Papilomavírus humano em um laboratório de patologia de Criciúma, no período de junho de 2010 a maio de 2013. Foi realizado um estudo censitário, descritivo, observacional, transversal e quantitativo. A amostra foi composta por 75 mulheres com captura híbrida positiva para Papilomavírus humano e idade mediana de 27,0 anos (23,0 ­ 32,0). Observou-se que 96,0% (n=72) dos exames citopatológicos do colo uterino apresentaram resultado normal, enquanto 4,0% (n=3) demonstraram lesão cervical de baixo grau. Em relação ao resultado do teste de captura híbrida, notou-se infecção pelo subtipo viral de alto risco oncogênico em 66,6% (n=50) das pacientes. Não houve significância estatística (p=0,253) entre as variáveis idade e os subtipos virais de HPV encontrados na captura híbrida. Pode-se identificar a concordância com a literatura no que se refere à idade de maior prevalência de infecção pelo HPV, a maior proporção de exames citopatológicos normais dentre os infectados e o maior número de infecções por HPV de alto risco oncogênico. Nossos achados podem contribuir para futuros estudos visando avaliar o benefício custo-efetivo do teste de captura híbrida como método de rastreamento populacional do câncer de colo uterino.

The HPV infection is the most common sexually transmitted infection in the world and is closely related to cervical cancer. It affects young women who are sexually active with incidence of approximately 25-45 %. The objective is discover the cytological findings in patients with positive hybrid capture for human papillomavirus in a pathology laboratory in Criciuma, from the time period of June 2010 to May 2013. A census-based study, descriptive, observational, cross-sectional and quantitative. The sample consisted of 75 women with positive HPV hybrid capture and who are around the age of 27, 0 years old (23.0 to 32.0). It was observed that 96.0% (n = 72) of cervical screening showed normal results, while the other 4.0%(n = 3) demonstrated low-grade cervical lesion. In relation to the results of the hybrid capture test, it was noticed that infection by high- risk viral subtype HPV in 66.6% (n =50) of patients. There was no statistically breadth of significance (p = 0.253) between the variable age and subtypes of HPV found in the hybrid capture. You can identify the agreement with the literature as regards to the age of highest prevalence of HPV infection, the largest proportion of normal Pap smears from the infected and the largest number of infections by high oncogênico risk HPV. Our findings may contribute to future studies to evaluate the benefits of costeffective hybrid capture test as a method of populational screening of cervical cancer.

Avaliação do rastreamento do câncer do colo do útero e sua periodicidade em um município de Santa Catarina / Assessment of cervical cancer screening and its periodicity in a city of Santa Catarina state

Modelo do estudo: Estudo de Prevalência. Objetivo do estudo: Conhecer a prevalência dos resultados alterados dos exames preventivos para câncer do colo do útero e a sua regularidade na coleta. Metodologia: Estudo observacional, transversal e retrospectivo. Foram estudadas 3.425 mulheres usuárias do Sistema Único de Saúde e 9.436 exames citopatológicos de novembro de 2003 a janeiro de 2014. Resultados: A mediana da idade foi de 35 anos (25,0 - 46,0, percentil 25 a 75%). No primeiro exame citopatológico, 2,7% das mulheres apresentaram alterações em células epiteliais. As Células escamosas atípicas de significado incerto (ASC-US) (n=54; 1,7%) e as lesões intra-epiteliais de baixo grau (LIEBG) (n=24; 0,7%) foram as mais frequentes. Ao longo do período observado houveram 87 novas alterações citopatológicas, totalizando 173 exames alterados em 9.436 analisados. Quanto a regularidade, 58,5% pacientes repetiram a segunda coleta. Conclusões: Houve um perfil predominante de mulheres jovens, sendo o diagnóstico de ASC-US o mais frequente. A flora bacteriana mais frequente foi Lactobacillus principalmente em mulheres jovens. (AU)

Study Model: Prevalence Study. Study objective: To determine the prevalence of the abnormal cervical cancer screening test (PAP) and regularity in repeat it. Methods: An observational, cross-sectional and retrospective study. 3,425 women, users of the Brazilian Unified Health System, and 9,436 cytopathology, conducted from November 2003 to January 2014, were studied. Results: The median age was 35 years (25.0 to 46.0, 25 to 75% percentile). In the first PAP, 2.7% of women examined had alterations in epithelial cells. The atypical squamous cells of uncertain significance (ASC-US) (n = 54; 1.7%), and low-grade intraepithelial lesion (LSIL) (n = 24; 0.7%) were the most frequent alterations found. During the observed period, 87 new abnormal PAPs were found, totalling 173 altered tests in 9436 analysed. Regarding regularity of test, 58.5% patients repeated the second PAP. Conclusions: There was a preferential profile of young women, and the diagnosis of ASC-US was the most frequently found. Lactobacillus, especially in young women, was the main bacterial flora. (AU)

Clinicopathologic characteristics of epidermal growth factor receptor mutations in non-small cell lung cancer in Xinjiang region / 中华病理学杂志

Objective@#To investigate the point mutation of epidermal growth factor receptor (EGFR) gene and clinicopathologic characteristics in patients with non-small cell lung cancers(NSCLC)of Xinjiang region.@*Methods@#Five-hundred and eighty-two cases of paraffin-embedded tissue in patients with NSCLC were collected between January 2013 and December 2015 in the First Affiliated Hospital of Xinjiang Medical University. The DNA was extracted from these tissues by Qiagen kit, to test thirty-two mutations in EGFR exons 18, 19, 20 and 21 using fluorescent quantitative qRT-PCR technology by TaqMan probe; the clinicopathologic features of patients were analyzed according to the mutation status of EGFR.@*Results@#There were 173 cases with EGFR gene mutation in 582 cases of paraffin-embedded tissue in patients with NSCLC, and the mutation rate was 29.7%(173/582). There were statistical difference in female patients (50.5%, 98/194), no history of smoking(47.3%, 96/203), high differentiation(6/9), adenosquamous carcinoma(6/11), peripheral location (34.9%, 88/252), and surgical specimens(38.2%, 83/217), respectively (P<0.05). Multiple factors Logistic analysis showed that gender, degree of differentiation, and pathologic types had statistical differences to EGFR when α=0.05. There were no statistical differences between other variants.@*Conclusions@#There are higher rate EGFR gene mutation in women patients, non-smokers, and well-differentiated, adenocarcinoma. Gender, degree of differentiation and pathological patterns are independent influencing factors on EGFR mutation status.

Incidence of Cervical Human Papillomavirus and Cervical Intraepithelial Neoplasia in Women with Positive and Negative HIV Status / Incidência de infecção cervical pelo vírus papiloma humano e neoplasia intraepitelial cervical em mulheres com sorologia positiva e negativa para o HIV

Abstract Objectives To evaluate the incidence and factors associated with cervical intraepithelial neoplasia (CIN) and cervical infection by human papillomavirus (HPV) among HIV-positive and HIV-negative women. Methods A cohort of 103 HIV positive and 113 HIV negative women were monitored between October 2008 and February 2012, for at least one year. Procedures included cervical cytology, DNA/HPV detection by polymerase chain reaction, colposcopy with biopsy if necessary, followed by an interview for exposure characteristics data. CIN was based on the histopathological results. Results The incidence of CIN was of 8.8 and 4.6 cases/100 women-years in HIVpositive and HIV-negative women, respectively. HIV-positive women presented a hazard ratio (HR) of 2.8 for CIN and developed lesions earlier (0.86 year) than HIVnegative women (2 years) (p = 0.01). The risk of developing CIN decreased with age (HR = 0.9) and marital status (HR = 0.4). HPV patients presented a higher incidence of CIN when compared HIV-positive and HIV-negative women (p = 0.01). The incidence of HPV cervical infection was 18.1 and 11.4 cases/100 women-years in HIV-positive and HIV-negative women, respectively. Those HIV-positive presented earlier HPV infection (p = 0.002). The risk of developing HPV infection decreased with age and was higher among HIV-positive women. HPV 16 was the most common type in HIV-positive women, and also the type most closely associated with CIN in HIV-negative women. Conclusions HIV-positive women had a greater incidence of HPV and CIN, and in a shorter time interval. More rigorous and timely clinical control is required for this group.

Resumo Objetivos Avaliar a incidência e fatores associados com neoplasia intraepitelial cervical (NIC) e infecção cervical pelo Papiloma Vírus Humano (HPV) entre mulheres HIV positivas e negativas. Métodos Coorte de 103 mulheres positivas para o HIV e 113 negativas, que foram acompanhadas entre outubro de 2008 a fevereiro de 2012, com seguimento mínimo de um ano. Os procedimentos realizados foram coleta de material cervical para citologia oncótica e detecção do DNA/HPV pela reação em cadeia da polimerase, colposcopia seguida de biópsia, se necessário, e entrevista para obter dados e características de exposição. O diagnóstico de NIC foi baseado no resultado histopatológico das biópsias. Resultados A incidência pessoas-tempo de NIC foi de 8,8 e 4,6 casos/100 mulheresano para as mulheres HIV-positivas e HIV-negativas, respectivamente. As HIV-positivas apresentaram uma razão de risco (HR) de 2,8 para NIC e desenvolveram lesões mais precocemente (0,86 ano) do que as negativas (2 anos) (p = 0,01). O risco de desenvolver NIC diminuiu com a idade (HR = 0,9) e o estado civil (HR = 0,4). Pacientes com HPV apresentaram maior incidência de NIC, quando comparadas as mulheres HIVpositivas e as negativas (47,6 10,5%) (p = 0,01). A incidência de infecção cervical pelo HPV, por pessoa/tempo, foi de 18,1 e 11,4 casos/100 mulheres-ano, respectivamente para mulheres HIV-positivas e negativas. As HIV-positivas apresentaram HPV mais precocemente (p = 0,002). O risco de apresentar HPV diminuiu com a idade e foi maior entre as HIV-positivas. O HPV 16 foi o tipo mais comum entre as mulheres HIVpositivas. Conclusões As mulheres HIV-positivas tiveram maior incidência de HPV e NIC, e um menor intervalo de tempo. Controle clínico mais rigoroso e oportuno é requerido para este grupo.

Triage strategies in cervical cancer detection in Mexico: methods of the FRIDA Study / Estrategias de triage en la detección de cáncer cervical: métodos del estudio FRIDA

Abstract Objective: This paper describes the study design and baseline characteristics of the study population, including the first 30 829 women who enrolled in the Forwarding Research for Improved Detection and Access for Cervical Cancer Screening and Triage (FRIDA Study). This is a large population based study that is evaluating the performance and cost-effectiveness of different triage strategies for high-risk HPV (hrHPV) positive women in Mexico. Materials and methods: The target population is more than 100 000 women aged 30 to 64 years who attend the Cervical Cancer Screening Program in 100 health centers in the state of Tlaxcala, Mexico. Since August 2013, all women in the region have been invited to enroll in the study. The study participants are evaluated to determine hrHPV infection using the Cobas 4800 HPV test. The HPV-16/18 genotyping and cytology triage strategies are performed as reflex tests in all hrHPV-positive participants. Women with a positive HPV-16/18 test and/or abnormal cytology (atypical squamous cells of undetermined significance or worse, ASCUS+) are referred for colposcopy evaluation, where a minimum of four biopsies and an endocervical sample are systematically collected. Histologic confirmation is performed by a standardized panel of pathologists. Results: Among the 30 829 women who have been screened, the overall prevalence of hrHPV is 11.0%. The overall prevalence of HPV16 and HPV18 are 1.5% and 0.7%, respectively. Cytological abnormalities (ASCUS+) were detected in 11.8% of the hrHPV-positive women. A total of 27.0% (920/3,401) of the hrHPV-positive women were referred to colposcopy because of a positive HPV16/18 test and/or abnormal reflex cytology, (31.6% had only ASCUS+, 53.6% were HPV16/18 positive with a normal cytology result, and 9.5% were positive to both triage tests). Conclusion: The results of this study will help policy makers and health service providers establish the best practices for triage in cervical cancer screening in Mexico and other countries.

Resumen Objetivo: El objetivo de este artículo es describir el diseño del estudio FRIDA y las características basales de las primeras 30 829 mujeres tamizadas. El estudio FRIDA (Forwarding Research for Improved Detection and Access for Cervical Cancer Screening and Triage) es un estudio de demostración con base poblacional diseñado para evaluar el desempeño y costo-efectividad de diferentes alternativas de triage en mujeres VPH de alto riesgo (VPHar) positivas bajo condiciones reales de un programa de tamizaje para cáncer cervical en México. Material y métodos: La población objetivo la conforman poco más de 100 000 mujeres de 30 a 64 años que asisten al programa de detección oportuna de cáncer cervical en alguno de los 100 centros de salud de la jurisdicción sanitaria 1 de Tlaxcala. Desde agosto de 2013, todas las mujeres son invitadas al estudio. Las participantes del estudio son tamizadas para determinar la infección con VPHar mediante la prueba VPHar Cobas 4800. Se realizan las pruebas de triage de tipificación de VPH16/18 y citología en todas las mujeres con resultados VPHar positivos. Las mujeres con un resultado positivo a VPH16/18 y/o citología anormal (células escamosas atípicas de resultado incierto o peor: ASCUS+) son referidas a evaluación colposcópica, seguida de una colección sistemática de un mínimo de cuatro biopsias cervicales y un cepillado endocervical. La confirmación histológica se lleva a cabo por un panel de patólogos. Resultados Un total de 30 829 mujeres han sido tamizadas, con una prevalencia de VPHar del 11.0%. La prevalencia global de VPH16 y VPH18 es 1.5% y 0.7%, respectivamente. Se detectó un 11.8% de anormalidades citológicas (ASCUS+). Entre las mujeres VPHar positivas, la prevalencia de un resultado de triage positivo (VPH16/18 o citología anormal) fue 27.0%, distribuido de la siguiente forma, 31.6% de éstos fueron sólo ASCUS+ VPH16/18 negativo, 53.6% fueron VPH 16/18 positivos y citología normal, y 9.5% positivos a ambas pruebas de triage. Conclusión: Los resultados de este estudio ayudarán tanto a los tomadores de decisiones como a los proveedores de servicios de salud a establecer la mejor estrategia de triage en programas de tamizaje de cáncer cervical basados en VPHar en México y en otros países.

Long-term evaluation of the antimicrobial susceptibility and microbial profile of subgingival biofilms in individuals with aggressive periodontitis

This study evaluates the antimicrobial susceptibility and composition of subgingival biofilms in generalized aggressive periodontitis (GAP) patients treated using mechanical/antimicrobial therapies, including chlorhexidine (CHX), amoxicillin (AMX) and metronidazole (MET). GAP patients allocated to the placebo (C, n = 15) or test group (T, n = 16) received full-mouth disinfection with CHX, scaling and root planning, and systemic AMX (500 mg)/MET (250 mg) or placebos. Subgingival plaque samples were obtained at baseline, 3, 6, 9 and 12 months post-therapy from 3–4 periodontal pockets, and the samples were pooled and cultivated under anaerobic conditions. The minimum inhibitory concentrations (MICs) of AMX, MET and CHX were assessed using the microdilution method. Bacterial species present in the cultivated biofilm were identified by checkerboard DNA-DNA hybridization. At baseline, no differences in the MICs between groups were observed for the 3 antimicrobials. In the T group, significant increases in the MICs of CHX (p < 0.05) and AMX (p < 0.01) were detected during the first 3 months; however, the MIC of MET decreased at 12 months (p < 0.05). For several species, the MICs significantly changed over time in both groups, i.e., Streptococci MICs tended to increase, while for several periodontal pathogens, the MICs diminished. A transitory increase in the MIC of the subgingival biofilm to AMX and CHX was observed in GAP patients treated using enhanced mechanical therapy with topical CHX and systemic AMX/MET. Both protocols presented limited effects on the cultivable subgingival microbiota.

Examen de detección de virus papiloma humano en el tamizaje de cáncer cervicouterino en un Servicio de Salud de Santiago, Chile / Human papillomavirus testing in cervical cancer screening at a public health service of Santiago, Chile

Background: Molecular techniques for human papillomavirus (HPV) detection have a good performance as screening tests and could be included in cervical cancer early detection programs. We conducted a population-based trial comparing HPV detection and Papanicolaou as primary screening tests, in a public health service in Santiago, Chile. Aim: To describe the experience of implementing this new molecular test and present the main results of the study. Material and Methods: Women aged 25 to 64 enrolled in three public health centers were invited to participate. In all women, samples were collected for Papanicolaou and HPV DNA testing, and naked-eye visual inspection of the cervix with acetic acid was performed. Women with any positive screening test were referred to the local area hospital for diagnostic confirmation with colposcopy and biopsy of suspicious lesions. Results: Screening results were obtained for 8265 women, of whom 931 (11.3%) were positive to any test. The prevalence of cervical intraepithelial neoplasia grade 2 or worse (CIN2+) was 1.1%; nine women had invasive cervical cancer. Sensitivities for the detection of CIN2+ were 22.1% (95% confidence interval (CI) 16.4-29.2) for Papanicolaou and 92.7% (95% CI 84.4-96.8) for HPV testing; specificities were 98.9% (95% CI 98.7-99.0) and 92.0% (95% CI 91.4-92.6) respectively. Conclusion: This experience showed that the implementation of a molecular test for cervical cancer screening is not a major challenge in Chile: it was well accepted by both the health team and the participants, and it may improve the effectiveness of the screening program.

Evaluation of triage strategies for high-risk human papilloma virus testing as primary screening for cervical cancer / 肿瘤

Objective: To evaluate the performance and application value of several triage strategies for high-risk human papillomavirus (HR-HPV) DNA testing as primary screening of human cervical cancer. Methods: The data from cross-sectional population-based studies for screening human cervical cancer carried out in Xiangyuan county of Shanxi province, China, 2003 were reanalyzed. Totally 1788 women were included in this study. All women were screened by liquid-based cytology (LBC), HR-HPV DNA testing-hybrid capture 2 (HPV-HC2) (for primary screening and analysis of high- and low-level viral loads), and visual inspection with acetic acid (VIA), then all positive women in any test were referred for colposcopy. If the colposcopy result was positive, the woman was referred for biopsy for the final pathological result. This study simulated the strategy in which HPV-HC2 testing was used as primary screening of cervical cancer, then LBC, VIA, HPV-HC2 high- and low-level viral load tests were used as the triage for HPV-positive women. The above strategies were compared by sensitivity, specificity, colposcopy referral rate and other indexes for high-grade squamous intraepithelial lesion (HSIL) and invasive cervical cancer. Moreover, the application value of the above strategies was analyzed by receiver operator characteristic (ROC) curve and the area under curve (AUC) (αcorrection = 0.0125). Results: The colposcopy referral rate, sensitivity, specificity and positive predictive value (PPV) of HPV primary screening with HPV-HC2 for detecting HSIL and invasive cervical cancer were 18.1%, 95.7%, 85.0% and 20.4%, respectively. After HPV primary screening, the referral rates of three strategies of triage with LBC, VIA and HR-HPV-HC2 low viral load were decreased to 8.7%, 4.5% and 9.8%, respectively; the specificity values were increased to 94.3%, 97.5% and 93.1%, respectively; the positive predictive values were increased to 37.2%, 46.9% and 32.0%, respectively; the sensitivity values were decreased to 84.1%, 55.1% and 81.2%, respectively. The difference of AUC between HPV primary screening and its combination with the triage of LBC or HPV-HC2 low viral load was not statistically significant (both P > 0.012 5), but the difference of AUC between HPV primary screening and its combination with the triage of VIA or HPV-HC2 high viral load was statistically significant (both P < 0.001). Conclusion: Considering the economy and adaptability, increasing the cut-off of HPV DNA testing (cut-off ≥10 pg/mL) to improve the screening efficiency of human cervical cancer is feasible and effective in low-resource and less-developed areas. HR-HPV primary screening with the triage of LBC can be introduced widespreadly in high-developed areas. HR-HPV primary screening with the triage of VIA is feasible in rural areas, but the skills of the health care providers responsible for testing should be trained and improved.

Oncogenic High-risk Human Papillomavirus Detection and Evaluation of Risk Factors in the Cervical Intraepithelial Neoplasia I / Detecção do Papilomavírus Humano de Alto Risco Oncogênico e Avaliação dos seus Fatores de Risco nas Neoplasias Intraepiteliais Cervicais Grau

The cervical intraepithelial neoplasia grade I (CIN I) shows an important percentual of spontaneous regression (80%) and there is no universal consensus if these lesions should be treated or only monitored. Lesions at risk for progression are precisely those associated with high-risk HPV. Knowing which CIN I are related to these viruses may be one of the determining factors for the decision to treat or not. Objective: To determine the prevalence of high-risk HPV in women with CIN I and to evaluate if there is an association between the presence of the virus and some risk factors. Methods : Cross-sectional descriptive study. We evaluated 55 women with histological diagnosis of CIN I. All of them were previously submitted to HPV-DNA testing. Results: 25 out of 55 (45.5%) women analyzed were positive for high-risk HPV. The virus infection was related with higher level of education, smoking and history of sexually transmitted diseases. Other risk factors like age, number of sexual partners, age at first sexual intercourse, use of hormonal contraceptives, and immunosuppression condition did not show a relation to the high-risk HPV infection. Conclusions: The prevalence of high-risk HPV in women with histological diagnosis of CIN I was 45.5%. HPV-DNA detection was associated with smoking, history of sexually transmitted diseases, and higher level of education.

As neoplasias intraepiteliais cervicais grau I (NIC I) apresentam um percentual importante de regressão espontânea (cerca de 80%) e não há um consenso universal se essas lesões devam ser tratadas ou apenas acompanhadas. As lesões que apresentam risco de progressão são justamente aquelas associadas aos HPV de alto risco oncogênico. O conhecimento de quais lesões estão relacionadas a esses vírus pode ser um dos fatores determinantes para a decisão de se tratar ou não tais lesões. Objetivo: Determinar a prevalência do papilomavírus humano (HPV) de alto risco oncogênico em mulheres com resultado histológico de NIC I e verificar a existência da associação entre a presença do vírus e alguns fatores de risco. Métodos: Trata-se de um estudo transversal, de caráter descritivo, onde foram avaliadas 55 mulheres com diagnóstico histopatológico de NIC I. Todas foram submetidas ao teste de DNA-HPV previamente. Resultados: Das 55 mulheres analisadas, 25 (45,5%) apresentaram HPV de alto risco positivo. A infecção pelo vírus foi associada às mulheres com mais anos de estudo, tabagismo e à história de alguma doença sexualmente transmissível. Outros fatores de risco, como a idade, o número de parceiros sexuais, a faixa etária em que ocorreu a coitarca, o uso de anticoncepcionais hormonais e o estado de imunossupressão, não mostraram relação com a infecção pelo HPV. Conclusão: A prevalência do HPV de alto risco oncogênico nas mulheres com diagnóstico histológico de NIC I foi de 45,5%. A detecção do vírus foi associada ao tabagismo, à história de doença sexualmente transmissível e a um grau maior de escolaridade.

Genital prevalence of HPV types and co-infection in men

Introduction: HPV infection is a highly prevalent sexually transmitted disease and there is evidence of the relationship of HPV infection and the development of genital warts, penile intraepitelial neoplasia, invasive penile carcinoma and cervical cancer. However, there is sparse data regarding the prevalence of HPV types and co-infection of different HPV types among men. Objectives: To assess the prevalence of HPV subtypes infections and rates of co-infection among men. Materials and Methods: 366 men were evaluated from March to October 2010. Men were referred to our institution for HPV diagnostic evaluation based on the following criteria: 1. presence of a genital wart; 2. presence of an atypical genital lesion; 3. absence of symptoms and a partner with a HPV diagnosis; 4. absence of symptoms and a desire to undergo a full STD diagnostic evaluation. Genital samples were collected from the urethra, penile shaft, scrotum and anus with Digene® collection and preservation kit and submitted to HPV genotype microarray detection (Papillocheck®). All men were tested for the low-risk HPV types 6-11-40-42-43-44 and for the high-risk HPV types 16-18-31-33-35-39-45-51-52-53-56-58-59-66-68-70-73-82. Results: Of the 366 men, 11 were tested inconclusive and were excluded from the analysis. 256 men (72.1% of the men from the cohort referred to our institution) tested positive with genotype micro-array detection and 99 tested negative. The most prevalent HPV-subtypes in the studied population were 6, 42, 51 and 16. Co-infection was found in 153 men. Of those, 70 (19.7%) had a co-infection by 2 types, 37 (10.4%) by 3 types; 33 men (9.2%) by 4 types; 8 men (2.2%) by 5 types; 1 man (0.3%) by 6 types; 1 man (0.3%) by 7 types; 2 men (0.6%) by 8 types and 1 man (0.3%) by 9 types. Conclusion: The most frequent HPV types were 6, 16, 42 and 51. Co-infection was found in 59% of our patients. This information is vital to drive future public health ...

Microbial Reduction by Two Chemical-Mechanical Protocols in Primary Teeth with Pulp Necrosis and Periradicular Lesion - An In Vivo Study

The objective of this study was to determine the efficacy of chemical-mechanical procedures of two endodontic protocols for septic content reduction of root canals from primary teeth with pulp necrosis and periradicular lesion. Twenty-four primary root canals with pulp necrosis and periradicular lesion were divided into two treatment groups (n=12): multiple-visit and single-visit protocols. Samples were collected using sterile paper points before and after endodontic cleaning followed by microbiological identification through checkerboard DNA-DNA hybridization. Statistical analysis was performed using Proportion Test for score=0 comparing the findings before and after treatment for each group (Wilcoxon's test) as well as the differences in scores between protocols (Mann-Whitney's test) (p<0.05). Data were expressed as prevalence (presence or absence) and estimate of the average count (x105 cells) of each species. Differences in proportions of score=0 prior to treatment were non-significant (p=0.415), demonstrating equivalence between groups. A significant increase in score=0 was detected after treatment for both groups (p<0.0001). Single-visit protocol achieved a significantly greater reduction in mean scoring following endodontic treatment (p=0.024). Both protocols were capable of significantly reducing septic content in root canals of primary teeth with periradicular lesion. Moreover, single-visit protocol showed greater efficacy in reducing endodontic infection.

O objetivo deste estudo foi determinar a eficácia das manobras químico-mecânicas de dois protocolos endodônticos, na redução do conteúdo séptico de canais radiculares de dentes decíduos com polpa necrosada e lesão perirradicular. Vinte e quatro canais radiculares decíduos com necrose pulpar e lesão perirradicular foram divididos em dois grupos de tratamento (n=12): multisessões e sessão única. Amostras foram coletadas usando pontas de papel estéreis, antes e após a limpeza endodôntica, seguido de identificação microbiológica por hibridização DNA-DNA checkerboard. A análise estatística foi realizada usando teste de proporções para escore=0, comparando os achados antes e após tratamento para cada grupo (teste de Wilcoxon) e as diferenças dos escores entre os protocolos (teste de Mann-Whitney) (p<0,05). Os dados foram expressos em prevalência (presença ou ausência) e contagem média (x105 células) de cada espécie. As diferenças nas proporções de escore=0 antes do tratamento não foram significativas (p=0,415), mostrando equivalência entre os grupos. Um aumento significativo de escore=0 foi detectado após o tratamento para ambos os grupos (p<0,0001). O protocolo de sessão única mostrou uma redução significativamente maior dos escores médios após o tratamento endodôntico (p=0,024). Ambos os protocolos são capazes de reduzir significativamente o conteúdo séptico de canais radiculares de dentes decíduos com lesão perirradicular. Entretanto, o protocolo de sessão única mostrou uma maior eficácia na redução da infecção endodôntica.

Diversidade microbiana em infecções endodônticas primárias associadas ao traumatismo dentário / Microbial diversity in primary root canal infections associated with dental trauma

O presente trabalho tem por objetivo investigar a microbiota de canais radiculares, buscando a identificação e a quantificação destes microrganismos. Foram selecionados 31 dentes com infecção primária devido a traumatismo dentário. As amostras microbiológicas foram coletadas dos canais com o auxílio de limas tipo Hedströen e cones de papel absorvente estéril. A técnica do Checkerboard DNA-DNA hybridization foi utilizada para detecção de até 38 espécies bacterianas em cada amostra, utilizando sondas de DNA específicas. Os dados microbiológicos foram expressos em percentagem média (prevalência), nível médio (contagem) e proporção de cada espécie em cada amostra. Os testes t independente e de correlação de Pearson foram usados para correlacionar as bactérias testadas com os tipos de trauma (p≤ 0,05). Foi encontrada uma média de 13,74 espécies por amostra. As espécies mais prevalentes foram P. melaninogenica (84%), E. faecalis (77%), C. gracilis (71%) e F. nucleatum sp. vicentii (71%). Algumas espécies demonstraram baixa prevalência, sendo elas A. odontolyticus (26%), P. acnes (26%), E. corrodens (23%), A. israelii (16%), A. gerencseriae (16%), P. endodontalis (16%) e A. naeslundii (13%). As espécies F. nucleatum sp. vicentii, P. nigrescens, T. denticola, C. gingivalis, C. rectus e P. gingivalis apresentaram níveis médios significativamente maiores entre os casos de trauma dentário e trauma de tecidos de suporte (P < 0,05). As bactérias T. denticola, C. gingivalis e P. gingivalis também apresentaram proporções significativamente mais elevados no casos de trauma de tecidos de suporte (p>0,05). Baseado nos resultados obtidos é possível concluir que o perfil da microbiota presente em dentes com periodontite apical primária causada por traumatismos dentários pode variar de acordo com a ocorrência de dano aos tecidos de suporte.

This study aims to investigate the microbiota of root canals, seeking to identify and quantify these microorganisms. Thirty one teeth with related primary infection due to dental trauma were selected. Microbiological samples were collected from the root canal using Hedströen files and sterile absorbent paper points. The checkerboard DNA-DNA hybridization molecular technique was used to detect up to 38 bacterial species in each sample using specific DNA probes. Microbiological data were expressed as mean percentage (prevalence), mean level (score) and the proportion of each species in each sample. The independent and Pearson correlation tests were used to correlate the bacterias tested with the types of trauma (p ≤ 0.05). An average of 13.74 species per sample was found. The most prevalent species were P. melaninogenica (84%), E. faecalis (77%), C. gracilis (71%) and F. nucleatum sp. vicentii (71%). The species that showed low prevalence were A. odontolyticus (26%), P. acnes (26%), E. corrodens (23%), A. israelii (16%), A. gerencseriae (16%), P. endodontalis (16%) and A. naeslundii (13%). The species F. nucleatum sp. vicentii, P. nigrescens, T. denticola, C. gingivalis, C. rectus and P. gingivalis showed significantly higher mean levels between cases of trauma to the supporting tissues and cases of dental trauma (P <0.05). T. denticola, P. gingivalis and C. gingivalis also showed significant higher ratios in the trauma to the supporting tissues cases (p> 0.05). Based on the obtained results, it can be concluded that the bacterial profile of pulpal necrosis caused by traumactic injuries may vary depending on the occurrence of damage to the supporting tissues.