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Revista Brasileira de Ginecologia e Obstetrícia. 2020;42(1):5-11
, , , , , Estimate the prevalence of human herpesvirus type 1 HSV-1 DNA in placental samples, its incidence in umbilical cord blood of newborns and the associated risk factors.
Placental biopsies and umbilical cord blood were analyzed, totaling 480 samples, from asymptomatic parturients and their newborns at a University Hospital. Nested polymerase chain reaction (PCR) and gene sequencingwere used to identify the virus; odds ratio (OR) and relative risk (RR) were performed to compare risk factors associated with this condition.
The prevalence of HSV-1 DNA in placental samples was 37.5%, and the incidence in cord blood was 27.5%. Hematogenous transplacental route was identified in 61.4% from HSV-1+ samples of umbilical cord blood paired with the placental tissue. No evidence of the virus was observed in the remaining 38.6% of placental tissues, suggesting an ascendant infection from the genital tract, without replication in the placental tissue, resulting in intra-amniotic infection and vertical transmission, seen by the virus in the cord blood. The lack of condom use increased the risk of finding HSV-1 in the placenta and umbilical cord blood.
The occurrence of HSV-1 DNA in the placenta and in cord blood found suggests vertical transmission from asymptomatic pregnant women to the fetus.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2020;42(1):5-11
, , , , , Estimate the prevalence of human herpesvirus type 1 HSV-1 DNA in placental samples, its incidence in umbilical cord blood of newborns and the associated risk factors.
Placental biopsies and umbilical cord blood were analyzed, totaling 480 samples, from asymptomatic parturients and their newborns at a University Hospital. Nested polymerase chain reaction (PCR) and gene sequencingwere used to identify the virus; odds ratio (OR) and relative risk (RR) were performed to compare risk factors associated with this condition.
The prevalence of HSV-1 DNA in placental samples was 37.5%, and the incidence in cord blood was 27.5%. Hematogenous transplacental route was identified in 61.4% from HSV-1+ samples of umbilical cord blood paired with the placental tissue. No evidence of the virus was observed in the remaining 38.6% of placental tissues, suggesting an ascendant infection from the genital tract, without replication in the placental tissue, resulting in intra-amniotic infection and vertical transmission, seen by the virus in the cord blood. The lack of condom use increased the risk of finding HSV-1 in the placenta and umbilical cord blood.
The occurrence of HSV-1 DNA in the placenta and in cord blood found suggests vertical transmission from asymptomatic pregnant women to the fetus.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2015;37(5):203-207
DOI 10.1590/SO100-720320150005293
To determine the frequency of Human Papillomavirus (HPV) in the placenta, in the
colostrum and in the umbilical cord blood of parturient women and their newborns
assisted at the Clinic of Gynecology and Obstetrics of the University Hospital of
Rio Grande (RS), Brazil.
Biopsies were collected from 150 placentas on the maternal side, 150 on the fetal
side, 138 samples of umbilical cord blood and 118 of the colostrum. The placenta
biopsies were collected from the central and peripheral portions. DNA was
extracted according to the manufacturer's protocol and to a reference found in the
literature. HPV was detected by the nested polymerase chain reaction (PCR-Nested)
using primers MY09/11 and GP5/GP6. Genotyping was performed by direct sequencing.
The participants responded to a self-applied questionnaire with demographic and
clinical data, in order to characterize the sample.
HPV was detected in 4% (6/150) of cases on the mother's side of the placentas, in
3.3% (5/150) on the fetal side, in 2.2% (3/138) in umbilical cord blood and in
0.84% (1/118) in colostrum samples. The vertical transmission rate was 50%. HPV-6
was the low-risk genotype found (60%) and the high-risk genotypes were HPV-16 and
HPV-18 (20% each).
These results suggest that HPV can infect the placenta, the colostrum and the
umbilical cord blood.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2015;37(5):203-207
DOI 10.1590/SO100-720320150005293
To determine the frequency of Human Papillomavirus (HPV) in the placenta, in the
colostrum and in the umbilical cord blood of parturient women and their newborns
assisted at the Clinic of Gynecology and Obstetrics of the University Hospital of
Rio Grande (RS), Brazil.
Biopsies were collected from 150 placentas on the maternal side, 150 on the fetal
side, 138 samples of umbilical cord blood and 118 of the colostrum. The placenta
biopsies were collected from the central and peripheral portions. DNA was
extracted according to the manufacturer's protocol and to a reference found in the
literature. HPV was detected by the nested polymerase chain reaction (PCR-Nested)
using primers MY09/11 and GP5/GP6. Genotyping was performed by direct sequencing.
The participants responded to a self-applied questionnaire with demographic and
clinical data, in order to characterize the sample.
HPV was detected in 4% (6/150) of cases on the mother's side of the placentas, in
3.3% (5/150) on the fetal side, in 2.2% (3/138) in umbilical cord blood and in
0.84% (1/118) in colostrum samples. The vertical transmission rate was 50%. HPV-6
was the low-risk genotype found (60%) and the high-risk genotypes were HPV-16 and
HPV-18 (20% each).
These results suggest that HPV can infect the placenta, the colostrum and the
umbilical cord blood.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2013;35(8):379-383
DOI 10.1590/S0100-72032013000800008
PURPOSE: It was to determine the prevalence of Chlamydia trachomatis and the risk factors associated with infection in endocervical specimens from women seen in outpatient Obstetrics and Gynecology. METHODS: Samples of endocervical secretion of 200 women treated at the University Hospital of the Federal University of Rio Grande were analyzed for the presence of C. trachomatis by polymerase chain reaction (PCR) using primers that amplify CT05/CT06 281 base pairs of the main outer membrane protein of C. trachomatis. All participants completed a pre-coded and self-report questionnaire. Data were analyzed with the SPSS 17.0 software; for multivariate analysis it was used Poisson regression. RESULTS: Of the 200 women who were included in the study, the prevalence of infection with C. trachomatis was 11% (22 patients) and these 55 (27.5%) were positive for HPV. Risk factors associated with infection by C. trachomatis were: 8 years or less of schooling (p<0.001), family income below the poverty level (p=0.005), first intercourse at age 15 or less (p=0.04) and being a carrier of the virus HIV (p<0.001). After multivariate analysis, only the variables of schooling or less than eight years (PR 6.0; 95%CI 1.26 - 29.0; p=0.02) and presence of HIV (RP 14.1; 95%CI 3.4 - 57.5; p<0.001) remained statistically significant. CONCLUSIONS: The prevalence of C. trachomatis in endocervical specimens by PCR was 11%. The factors associated with a higher infection by C. trachomatis were lower education and being HIV positive.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2013;35(8):379-383
DOI 10.1590/S0100-72032013000800008
PURPOSE: It was to determine the prevalence of Chlamydia trachomatis and the risk factors associated with infection in endocervical specimens from women seen in outpatient Obstetrics and Gynecology. METHODS: Samples of endocervical secretion of 200 women treated at the University Hospital of the Federal University of Rio Grande were analyzed for the presence of C. trachomatis by polymerase chain reaction (PCR) using primers that amplify CT05/CT06 281 base pairs of the main outer membrane protein of C. trachomatis. All participants completed a pre-coded and self-report questionnaire. Data were analyzed with the SPSS 17.0 software; for multivariate analysis it was used Poisson regression. RESULTS: Of the 200 women who were included in the study, the prevalence of infection with C. trachomatis was 11% (22 patients) and these 55 (27.5%) were positive for HPV. Risk factors associated with infection by C. trachomatis were: 8 years or less of schooling (p<0.001), family income below the poverty level (p=0.005), first intercourse at age 15 or less (p=0.04) and being a carrier of the virus HIV (p<0.001). After multivariate analysis, only the variables of schooling or less than eight years (PR 6.0; 95%CI 1.26 - 29.0; p=0.02) and presence of HIV (RP 14.1; 95%CI 3.4 - 57.5; p<0.001) remained statistically significant. CONCLUSIONS: The prevalence of C. trachomatis in endocervical specimens by PCR was 11%. The factors associated with a higher infection by C. trachomatis were lower education and being HIV positive.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2013;35(5):226-232
DOI 10.1590/S0100-72032013000500007
PURPOSE: To determine the HPV prevalence and genotypes and to identify factors associated with infection in pregnant and non-pregnant women with positive or negative HIV-1, treated in Gynecology and Obstetrics Ambulatories and in Health Primary Units, in Rio Grande, Rio Grande do Sul State, Brazil. METHODS: Cervical cells samples from 302 patients were analyzed for HPV presence and genotypes were determined by nested and sequencing polymerase chain reaction. We calculated prevalence ratios associated with the studied variables by Fisher's exact or χ² tests, and Poisson's regression. Women with insufficient material were excluded from the study. RESULTS: HPV was detected in 55 of the 302 women included in the study (18.2%); of these, 31 were pregnant, showing a significant association for HPV (p=0.04) when compared to non-pregnant ones. Risk factors for the infection were: patients aged <20 years-old (p=0.04), early initiation of sexual life (p=0.04), absence of cytological test (p=0.01), diagnosis of altered cytology (p=0.001), and counting <349 cells/mm³ (p=0.05). However, multi-parity was found to be a protective factor for the infection (p=0.01). Multivariate analysis showed that age <20 years-old (PR=2.8; 95%CI 1.0 - 7.7, p=0.04) and an altered cytological result (PR=11.1; 95%CI 3.0 - 4.1, p=0.001) were significantly associated with infection. HPV genotype was determined in 47 samples (85.4%) presenting one genotype per infection: eight HPV 16 and 58; six HPV 6; four HPV 18 and 33; three HPV 53 and 82; two HPV 83 and 61; one HPV 31, 35, 45, 64, 68, 71 and 85. CONCLUSIONS: The prevalence of HPV detection was 18.2%, the most frequent genotypes were 16 and 58, and sociodemographic and gynecological factors were associated with viral infection.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2013;35(5):226-232
DOI 10.1590/S0100-72032013000500007
PURPOSE: To determine the HPV prevalence and genotypes and to identify factors associated with infection in pregnant and non-pregnant women with positive or negative HIV-1, treated in Gynecology and Obstetrics Ambulatories and in Health Primary Units, in Rio Grande, Rio Grande do Sul State, Brazil. METHODS: Cervical cells samples from 302 patients were analyzed for HPV presence and genotypes were determined by nested and sequencing polymerase chain reaction. We calculated prevalence ratios associated with the studied variables by Fisher's exact or χ² tests, and Poisson's regression. Women with insufficient material were excluded from the study. RESULTS: HPV was detected in 55 of the 302 women included in the study (18.2%); of these, 31 were pregnant, showing a significant association for HPV (p=0.04) when compared to non-pregnant ones. Risk factors for the infection were: patients aged <20 years-old (p=0.04), early initiation of sexual life (p=0.04), absence of cytological test (p=0.01), diagnosis of altered cytology (p=0.001), and counting <349 cells/mm³ (p=0.05). However, multi-parity was found to be a protective factor for the infection (p=0.01). Multivariate analysis showed that age <20 years-old (PR=2.8; 95%CI 1.0 - 7.7, p=0.04) and an altered cytological result (PR=11.1; 95%CI 3.0 - 4.1, p=0.001) were significantly associated with infection. HPV genotype was determined in 47 samples (85.4%) presenting one genotype per infection: eight HPV 16 and 58; six HPV 6; four HPV 18 and 33; three HPV 53 and 82; two HPV 83 and 61; one HPV 31, 35, 45, 64, 68, 71 and 85. CONCLUSIONS: The prevalence of HPV detection was 18.2%, the most frequent genotypes were 16 and 58, and sociodemographic and gynecological factors were associated with viral infection.