Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 7 de 7
Mais filtros

Intervalo de ano de publicação
J Clin Pathol ; 73(1): 30-34, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31315894


AIMS: The purpose of the present study was to elucidate the presence of human herpesvirus 6A (HHV-6A), HHV-6B and HHV-7 in samples of the uterine cervix through detection of viral DNA. We analysed normal tissues, samples with low-grade squamous intraepithelial lesions (LSILs) and high-grade squamous intraepithelial lesions (HSILs). We correlated the presence of HHV-6 and HHV-7 with the finding of human papillomavirus (HPV) in mucosal samples. METHODS: Cervical samples were examined and grouped as follows: group 1 (n=29), normal cytology; group 2 (n=61), samples with LSIL; group 3 (n=35), samples with HSIL. Molecular biology examinations were performed in all samples to detect HHV-6, HHV-7 and HPV DNA and to typify HHV-6 species. RESULTS: Group 1: normal cytology and HPV (-): HHV-6: 6.8% (2/29), HHV-7: 79.3% (23/29); group 2: LSIL and HPV (-): HHV-6: 93.1% (27/29), HHV-7: 96.5% (28/29); LSIL and HPV (+): HHV-6: 0% (0/32), HHV-7: 90.6% (29/32); group 3: HSIL and HPV (-): HHV-6: 20% (2/10), HHV-7: 70% (7/10); HSIL HPV (+): HHV-6: 12% (3/25), HHV-7: 68% (17/25). HHV-6A DNA was not detected in any samples. CONCLUSIONS: (1) Both HHV-6 and HHV-7 infect the mucosal cells of the cervix with higher prevalence of HHV-7. (2) The higher prevalence of HHV-6 in LSIL HPV (-) samples compared with those with normal cytology indicates that it constitutes a possible risk factor for atypia production. (3) The presence of HHV-7 in all samples questions its role in the production of atypia. (4) The finding of HHV-6 and HHV-7 suggests that the cervical mucosa is a possible transmission pathway for these viruses.

Neoplasia Intraepitelial Cervical/diagnóstico , DNA Viral/genética , Herpesvirus Humano 6/genética , Herpesvirus Humano 7/genética , Técnicas de Diagnóstico Molecular , Infecções por Roseolovirus/diagnóstico , Lesões Intraepiteliais Escamosas Cervicais/diagnóstico , Neoplasias do Colo do Útero/diagnóstico , Adolescente , Adulto , Argentina , Neoplasia Intraepitelial Cervical/genética , Neoplasia Intraepitelial Cervical/virologia , Feminino , Testes de DNA para Papilomavírus Humano , Humanos , Pessoa de Meia-Idade , Papillomaviridae/genética , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/genética , Infecções por Papillomavirus/virologia , Valor Preditivo dos Testes , Prognóstico , Estudos Retrospectivos , Infecções por Roseolovirus/genética , Infecções por Roseolovirus/transmissão , Infecções por Roseolovirus/virologia , Lesões Intraepiteliais Escamosas Cervicais/genética , Lesões Intraepiteliais Escamosas Cervicais/virologia , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/virologia , Adulto Jovem
J Oral Microbiol ; 11(1): 1632129, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31275530


Objective: Provide evidence of HPV, C. trachomatis, and HSV infection in the oral cavity from patients with different types of stomatological lesions. Materials and Methods: Oral swabs samples were collected from a total of 318 patients. The infectious agents were analyzed using the PCR technique. HPV genotyping and HSV type were studied using the RFLP method. Results: We studied 137 benign lesions (B), 96 potentially malignant disorders (PMD) and 85 oral squamous cell carcinomas (OSCC). The prevalence of HPV was 34%. The most frequently genotypes detected were 6 low risk and 16 high risk. The prevalence of C. trachomatis was 16% and HSV 3%. Co-infections were detected mostly in benign lesions as following: HPV-C. trachomatis in 4%, C. trachomatis- HSV in 1.8% and HPV-HSV in 0.3%. Conclusion: This report is the first contribution to the identification and genotype characterization of HPV in a scenario little studied in our area, and it also contributes to improving our understanding on sexually transmitted infectious agents and their associations with the oral cavity. Besides, we detect the presence of C. trachomatis and HSV and co-infection with HPV in the oral cavity, which they should be taken into account for diagnostic and treatment purposes.

PLoS One ; 14(5): e0217245, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31150440


BACKGROUND: Chlamydia trachomatis causes the most prevalent bacterial Sexual Transmitted Infection. In pregnant women, untreated chlamydial infections are associated with abortions, premature rupture of membranes, postpartum endometritis, low birth weight and transmission to the newborn. In Córdoba, Argentina, there is little knowledge about the prevalence of Chlamydia trachomatis in women in their third trimester of pregnancy, so, the aim of this study was to evaluate Chlamydia trachomatis prevalence and genotypes present in Cordovan pregnant women with different age and socioeconomic status. METHODS AND FINDINGS: Design: prospective study. Settings: Women population from Cordoba city, Argentina. Population: Pregnant women having 35 to 37 weeks of gestation. Methods: Five hundred and nine cervical swabs were collected. Each sample was subjected to DNA extraction and PCR for Chlamydia trachomatis using primers NRO/NLO and CTP1/CTP2. Positives samples were sequenced to determine genotype. Main outcome measures: Demographic data of the patients were collected to detect a population at risk for this infection. RESULTS: A prevalence of 6.9% (35/509) for Chlamydia trachomatis infection was detected, with 32/295 and 3/214 from pregnant women with low or better economic resources respectively (p = 0,0001). Results showed a significantly increased rate of 11.6% (30/258) in women under 25 years compared with 2% (5/251) in patients over that age (p = 0,00003). Genotype E was the most prevalent. CONCLUSIONS: With these results, we can say that pregnant women under 25 years old and low economic resources are one of the populations in which the screening programs of Chlamydia trachomatis should focus.

Infecções por Chlamydia/epidemiologia , Infecções por Chlamydia/microbiologia , Chlamydia trachomatis/genética , Complicações Infecciosas na Gravidez/epidemiologia , Complicações Infecciosas na Gravidez/microbiologia , Aborto Induzido/métodos , Adolescente , Adulto , Argentina , Chlamydia trachomatis/patogenicidade , Feminino , Genótipo , Humanos , Recém-Nascido de Baixo Peso , Recém-Nascido , Gravidez , Prevalência , Estudos Prospectivos , Fatores de Risco , Comportamento Sexual , Adulto Jovem
Rev. esp. quimioter ; 31(1): 21-26, feb. 2018. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-171336


Introducción. Chlamydia trachomatis es una de las bacterias más prevalentes en infecciones sexualmente transmisibles. En mujeres, la infección por C. trachomatis puede causar cervicitis y uretritis, aunque suele cursar en forma asintomática. El objetivo de este trabajo fue establecer la prevalencia de C. trachomatis y detectar los genotipos circulantes en mujeres que concurren al laboratorio del Instituto de Previsión Social. Material y métodos. Se analizaron 505 muestras endocervicales de mujeres sintomáticas y asintomáticas. Se determinó la presencia de C. trachomatis por PCR, mediante la amplificación de un fragmento del plásmido críptico. Las muestras positivas fueron genotipificadas mediante la amplificación parcial del gen ompA y se analizaron filogenéticamente. Resultados. Se detectaron 43 muestras positivas a la infección por C. trachomatis, obteniéndose una prevalencia de 8,5% (IC 95%: 6,4-11,3%). La prevalencia de C. trachomatis fue superior en las mujeres con sintomatología vaginal [11,3% (30/265) vs. 5,4% (13/240)] (p=0,018), así como en las mujeres menores de 26 años [11,5% (28/244) vs. 6,1% (15/246)] (p=0,021). A partir del análisis filogenético, se observó que el 62% de las muestras positivas para el gen ompA pertenecieron al genotipo E, 15% al genotipo J, 15% al genotipo D y 8% al F. Conclusiones. Este trabajo es el primer aporte sobre la epidemiología molecular de C. trachomatis en la provincia de Misiones, Argentina, que muestra la tasa de prevalencia de esta bacteria y ofrece información de genotipos circulantes (AU)

Background. Chlamydia trachomatis is the most prevalent bacteria causing sexually transmitted infections. In women, this infection can cause cervicitis and urethritis, although it’s usually asymptomatic. The aim of this study was to investigate the prevalence of C. trachomatis in women attending the lab Instituto de Previsión Social and detect the genotypes. Material and methods. Endocervical samples from 505 symptomatic and asymptomatic women were assayed. It was determined the presence of C. trachomatis by PCR through amplification of a fragment of the cryptic plasmid. Positive samples were genotyped by the partial amplification of the ompA gene and analyzed phylogenetically. Results. Forty-three positive samples were detected to infection with C. trachomatis, obtaining a prevalence of 8.5% (IC 95%: 6.4-11.3%). The prevalence of C. trachomatis was higher in women with vaginal symptoms [11.3% (30/265) vs. 5.4% (13/240)] (p = 0.018), as well as in women under 26 year-old [11.5% (28/244) vs. 6.2% (15/246)] (p = 0.021). Based on phylogenetic analysis, it was observed that 62% of the samples were genotype E, 15% genotype J, 15% genotype D, and 8% genotype F. Conclusions. This work is the first contribution on the molecular epidemiology of C. trachomatis in the Misiones province, Argentina, which shows the rate of prevalence of this bacterium and offers information on circulating genotypes (AU)

Humanos , Feminino , Adolescente , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Infecções por Chlamydia/epidemiologia , Chlamydia trachomatis/isolamento & purificação , Técnicas de Genotipagem , Argentina/epidemiologia , Chlamydia trachomatis/genética , Filogenia , Esfregaço Vaginal , Reação em Cadeia da Polimerase , Doenças Bacterianas Sexualmente Transmissíveis/epidemiologia
Infect Genet Evol ; 44: 43-45, 2016 10.
Artigo em Inglês | MEDLINE | ID: mdl-27328126


In this study, genetic diversity of Chlamydia pneumoniae was investigated and the relationships between sequences amplified of different sources, clinical conditions and geographical regions of central Argentina were established. Samples amplified were similar to human C. pneumoniae patterns and show the high clonality of the population.

Chlamydophila pneumoniae/genética , Animais , Argentina , Proteínas da Membrana Bacteriana Externa/genética , Proteínas de Bactérias/genética , Infecções por Chlamydia/microbiologia , Chlamydophila pneumoniae/isolamento & purificação , Chlamydophila pneumoniae/patogenicidade , Humanos , Filogenia
Asian Pac J Cancer Prev ; 17(5): 2689-94, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27268652


BACKGROUND: Most studies of human papilloma virus (HPV) are aimed at the natural history of the infection and its relation to cancer; however, there are few studies to assess knowledge of the general population. Our aim was analyze the degree of knowledge of Argentinians about HPV infection and its prevention. MATERIALS AND METHODS: We conducted a voluntary, anonymous and non-binding survey with 27 multiple-choice items, in twelve private and public establishments, selected to include a broad population in terms of education, age and gender. The survey consisted of three sections: individual characteristics of the volunteer, HPV infection basic knowledge, its prevention and the virus relationship with other cancers. RESULTS: One thousand two hundred ninety seven volunteers aged 18 to 80 participated. The total number of correct answers was 45.1%. The correct answers for relationship HPV and cervical cancer was 62.1%. Almost 55% did not know about types of HPV that the vaccines for protection. Statistical analysis showed that women, single people, workers, the better educated, those who have had a STDs or HPV and receiving information through medical or educational establishments had greater knowledge of the topic. Only 0.2% of participants answered all questions correctly. CONCLUSIONS: Knowledge plays an important role in health care and the deficiency found in our population could influence the success of the measures taken in the fight against cervical cancer. In this regard, we believe it would be appropriate, not only to emphasize early diagnosis and vaccine implementation, but also incorporate new communication strategies, facilitating reception of accurate and precise information by all strata of society.

Conhecimentos, Atitudes e Prática em Saúde , Papillomaviridae/patogenicidade , Infecções por Papillomavirus/prevenção & controle , Vacinas contra Papillomavirus/uso terapêutico , Neoplasias do Colo do Útero/prevenção & controle , Adolescente , Adulto , Argentina , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/virologia , Aceitação pelo Paciente de Cuidados de Saúde , Prognóstico , Inquéritos e Questionários , Neoplasias do Colo do Útero/virologia , Vacinação , Adulto Jovem
Asian Pac J Cancer Prev ; 16(3): 1151-7, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25735347


Human papillomavirus (HPV) is responsible for one of the most frequent sexually transmitted infections. The first phylogenetic analysis was based on a LCR region fragment. Nowadays, 4 variants are known: African (Af-1, Af-2), Asian-American (AA) and European (E). However the existence of sub-lineages of the European variant havs been proposed, specific mutations in the E6 and LCR sequences being possibly related to persistent viral infections. The aim of this study was a phylogenetic study of HPV16 sequences of endocervical samples from Cordoba, in order to detect the circulating lineages and analyze the presence of mutations that could be correlated with malignant disease. The phylogenetic analysis determined that 86% of the samples belonged to the E variant, 7% to AF-1 and the remaining 7% to AF-2. The most frequent mutation in LCR sequences was G7521A, in 80% of the analyzed samples; it affects the binding site of a transcription factor that could contribute to carcinogenesis. In the E6 sequences, the most common mutation was T350G (L83V), detected in 67% of the samples, associated with increased risk of persistent infection. The high detection rate of the European lineage correlated with patterns of human migration. This study emphasizes the importance of recognizing circulating lineages, as well as the detection of mutations associated with high-grade neoplastic lesions that could be correlated to the development of carcinogenic lesions.

Carcinoma de Células Escamosas/genética , Papillomavirus Humano 16/genética , Região de Controle de Locus Gênico/genética , Mutação/genética , Proteínas Oncogênicas Virais/genética , Infecções por Papillomavirus/genética , Proteínas Repressoras/genética , Neoplasias do Colo do Útero/genética , Carcinogênese , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/virologia , DNA Viral/genética , Feminino , Seguimentos , Humanos , Gradação de Tumores , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/virologia , Filogenia , Reação em Cadeia da Polimerase , Polimorfismo Genético/genética , Prognóstico , Neoplasias do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/virologia