Nugent Criteria Research Articles

Higher levels of cervicovaginal inflammatory and regulatory cytokines and chemokines in healthy young women with immature cervical epithelium

Young women aged 15-24 years have the highest rates of sexually transmitted infections (STIs). The vulnerability of adolescents is often attributed to risky sexual behaviors, whereas biological factors affecting mucosal immunity are poorly understood. The objective of this cross-sectional study was to examine associations between the type of cervical epithelium and protein levels of 11 cervicovaginal cytokines and chemokines in non-pregnant healthy young women. Cervical epithelial types were viewed on colpophotography and measured quantitatively using computerized planimetry. We selected 16 women with immature epithelium (predominantly columnar and early/mid squamous metaplasia), and 16 women with mature epithelium (predominantly squamous epithelium). Cytokine levels were measured in cervicovaginal lavage samples by MILLIPLEX™ MAP Human Cytokine/Chemokine multiplex immunoassay. Bivariate Box-Cox regression models compared cytokine levels between immature and mature groups. Multivariate Box-Cox models adjusted separately for age, years since menarche, days since last menses, years of sexual activity, number of lifetime sexual partners, HPV infection, hormonal contraceptive use, smoking, bacterial vaginosis by Nugent's criteria, and polymorphonuclear cells on wet prep. The mean age was 19.2 years. Women with immature epithelium demonstrated significantly higher levels of IL-1α, IL-1β, IL-6, IL-8, MIP-1α, RANTES, TNFα, IL-10, IL-12 and IFNγ (each p<0.01), compared to women with mature epithelium. Results remained highly significant in the multivariate models. Cytokine profiles in the healthy state may foreshadow differential responses to pathogens. Cervical epithelial type should be measured in clinical studies involving cervicovaginal immune markers.

Interplay of cytokine polymorphisms and bacterial vaginosis in the etiology of preterm delivery.

Recent findings suggest that the association between inflammation-related genes and preterm delivery may be stronger in the presence of bacterial vaginosis (BV). Tumor necrosis factor-alpha (TNFα) and interleukin 1-beta (IL-1β) are pro-inflammatory cytokines capable of inducing preterm labor in non-human primates. In this study the authors tested associations among two TNFα promoter polymorphisms (-G308A and -G238A), a single IL-1β polymorphism (+C3954T), vaginal microbial findings, and risk of preterm delivery. Data were from the Pregnancy Outcomes and Community Health (POUCH) Study (n=777 term and n=230 preterm deliveries). Vaginal smears collected at mid-pregnancy (15-27 weeks gestation) were scored according to Nugent's criteria. A Nugent score of ≥ 4 was modeled as the cut-point for intermediate and positive BV. Logistic regression was used to estimate odds ratios for associations among independent covariates (vaginal flora, genotype) and preterm delivery. Results showed that women with a Nugent score of≥ 4 and the TNFα -238 A/G or A/A were at increased risk of delivering preterm (race/ethnicity adjusted OR 2.6, 95% CI 1.2, 5.8). The p-value for the genotype and Nugent score interaction=0.02. This study points to one more example of a potential gene-environment interaction in a preterm delivery pathway. Future tests of this finding will determine the robustness of these results.

Response of Gardnerella vaginalis biofilm to 5 days of moxifloxacin treatment

Polymicrobial communities are often recalcitrant to antibiotics. We tested whether the polymicrobial Gardnerella vaginalis biofilm can be eradicated with moxifloxacin. Twenty women with bacterial vaginosis were treated with 400 mg moxifloxacin for 5 days. The changes in the occurrence and proportions of Gardnerella, Atopobium and Lactobacillus spp. were assessed using FISH. The bacterial biofilm was investigated using desquamated epithelial cells of spontaneously voided urine and sections of vaginal biopsies. Fifteen of 20 women showed a significant and sustained clinical response to moxifloxacin according to Amsel and Nugent criteria. The concentrations of adherent bacteria decreased significantly. The incidence and proportion of Atopobium declined sustainably. The proportions of Lactobacillus in the biofilm mass increased following therapy. Initially, Gardnerella was the main component of the polymicrobial biofilm. Following treatment, Gardnerella was not accessible to FISH in the urine and vaginal samples of 75% of all women. Ten to 12 weeks after the end of therapy, Gardnerella biofilm was cumulatively present in 40%. This was not due to newly acquired disease, but due to reactivation of the persisting, but biochemically inactive biofilm. Despite clear clinical efficacy, and initially definite suppression of the biofilm, moxifloxacin was, similar to metronidazole, not able to eradicate the Gardnerella vaginalis biofilm in all patients.

Is bacterial vaginosis associated with a pro-inflammatory cytokine profile in endometrial secretions of women undergoing IVF?

The objective of this prospective cohort study was to elucidate whether bacterial vaginosis (BV) is associated with a pro-inflammatory endometrial secretion cytokine profile and whether there is a relationship between BV and the concentrations of a number of key regulatory cytokines, chemokines and growth factors. A total of 198 women undergoing IVF treatment were included. Prior to embryo transfer, participants underwent screening for BV according to Nugent criteria by a Gram-stained cervical smear. The concentrations of 17 soluble mediators of human implantation were measured by multiplex immunoassay in endometrial secretions aspirated prior to embryo transfer. Seventeen (8.6%) women had BV (Nugent score >6). Multivariable logistic regression showed a significant positive association between interleukin-beta and the presence of BV (P=0.011; Nugent score >6 versus 6) and a significant negative association between eotaxin and BV (P=0.003). No significant differences were found in the ratios of distinct pro- and anti-inflammatory cytokines in endometrial secretions from women with or without BV. In conclusion, BV is associated with higher concentrations of interleukin-beta in endometrial secretions compared with women without BV. However, no distinct difference in pro- and anti-inflammatory profiles is present. An effect on endometrial receptivity is unlikely.

Quantitative PCR Assessments of Bacterial Species in Women with and without Bacterial Vaginosis

Knowledge of the abundance of bacterial species in vaginal communities will help us to better understand their role in health and disease. However, progress in this field has been limited because quantifying bacteria in natural specimens is an arduous process. We developed quantitative real-time PCR (qPCR) assays to facilitate assessments of bacterial abundance in vaginal specimens and evaluated the utility of these assays by measuring species abundance in patients whose vaginal floras were clinically described as normal, intermediate, or bacterial vaginosis (BV) as defined by Nugent's criteria. The qPCR measurements showed that Lactobacillus species were predominant in normal vaginal specimens and that high Lactobacillus crispatus and Lactobacillus jensenii abundance was specific to normal specimens, while Lactobacillus iners abundance was high in all categories including BV. The abundances of all non-Lactobacillus species were higher in BV specimens than in normal specimens. Prevotella species were prevalent in all specimens and represented a high percentage of total species in BV specimens. qPCR assays can be a useful tool for describing the structure of vaginal communities and elucidating their role in health and disease.

Perfil clínico e microbiológico de mulheres com vaginose bacteriana

to study the clinical and microbiological profile of women with bacterial vaginosis participating in a randomized, double-blind clinical trial, which compared the vaginal use of preparations from red pepper tree and metronidazole for the treatment of genital discharge. the study was conducted on a series of 277 women with bacterial vaginosis concomitantly diagnosed by the criteria of Amsel and Nugent, selected from a total of 462 recruited patients using the information obtained before intervention. Data were analyzed with the Epi-Info 3.32 software. In order to compare the outcomes frequencies between the intervention groups, the chi2 test was used and the risk ratio and 95% confidence interval were calculated. The intention to treat analysis was performed. In addition to the determination of diagnostic parameters, the culture of vaginal content and a Papanicolaou cytology test were also performed. the most frequent clinical complaints were genital discharge, observed in 206 participants (74.4%) and the fish odor of the vaginal secretion, which occurred in 68.6% of the cases (190 patients). Among the diagnostic clinical criteria, the presence of clue-cells was positive in 275 women (99.3%), the Whiff test, in 266 (96.0%), followed by pH >4.5, which occurred in 92.8% of the cases, and by the presence of fluid grayish discharge reported by 206 participants (74.4%). Regarding the Nugent criterion, the median score was 8.0. Culture of the vaginal content permitted the identification of Gardnerella vaginalis in 96.8% of cases and of Mobiluncus in 53.1%. Only one third of the exams showed the presence of Lactobacillus (89 women - 32.1%). Fungal growth occurred in the cultures of 14 participants (5.1%). In most cases, culture revealed the presence of Corynebacterium (94.2%), Gram-positive cocci (98.2%), as well as Gram-positive (99.3%) and Gram-negative (91.0%) bacilli. Oncotic colposcopy revealed a very scarce presence of lactobacilli, which were present in only 8 cytological exams (2.9%) out of the total of 273 exams performed. the results of the present study did not differ from the literature regarding the symptoms reported by the women, the clinical criteria most frequently observed in the diagnosis, or the bacterial species detected in cultures of vaginal content. These findings indicate the need for further studies that might better elucidate the interrelations between the microbiological findings and the clinical expression of bacterial vaginosis.

Elafin (SKALP/Trappin-2/proteinase inhibitor-3) Is Produced by the Cervix in Pregnancy and Cervicovaginal Levels Are Diminished in Bacterial Vaginosis

To examine cervicovaginal elafin production in pregnancy and determine its relationship in bacterial vaginosis. Samples of cervicovaginal secretions were collected from women with uncomplicated singleton pregnancies (n = 112) below 20 weeks gestation. Bacterial flora was assessed using Nugent's criteria, and levels of elafin were measured by enzyme-linked immunosorbent serologic assay (ELISA). Elafin expression in the cervix was also examined by immunohistochemistry. In vitro expression of elafin was examined using cervix and vaginal cell lines. Elafin is expressed in the cervical glandular epithelium. Elafin was found in all 112 samples of cervicovaginal secretions and levels were diminished in women with bacterial vaginosis (P < .05). Interleukin 1beta (IL-1beta) stimulated elafin expression in cells derived from the endocervix, but not in those derived from the vaginal epithelium. Elafin is a component of cervicovaginal secretions in pregnancy, and levels are diminished in bacterial vaginosis. It may be an important component of innate immunity in the lower genital tract.

The vaginal microflora in relation to gingivitis.

BackgroundGingivitis has been linked to adverse pregnancy outcome (APO). Bacterial vaginosis (BV) has been associated with APO. We assessed if bacterial counts in BV is associated with gingivitis suggesting a systemic infectious susceptibilty.MethodsVaginal samples were collected from 180 women (mean age 29.4 years, SD ± 6.8, range: 18 to 46), and at least six months after delivery, and assessed by semi-quantitative DNA-DNA checkerboard hybridization assay (74 bacterial species). BV was defined by Gram stain (Nugent criteria). Gingivitis was defined as bleeding on probing at ≥ 20% of tooth sites.ResultsA Nugent score of 0–3 (normal vaginal microflora) was found in 83 women (46.1%), and a score of > 7 (BV) in 49 women (27.2%). Gingivitis was diagnosed in 114 women (63.3%). Women with a diagnosis of BV were more likely to have gingivitis (p = 0.01). Independent of gingival conditions, vaginal bacterial counts were higher (p < 0.001) for 38/74 species in BV+ in comparison to BV- women. Counts of four lactobacilli species were higher in BV- women (p < 0.001). Independent of BV diagnosis, women with gingivitis had higher counts of Prevotella bivia (p < 0.001), and Prevotella disiens (p < 0.001). P. bivia, P. disiens, M. curtisii and M. mulieris (all at the p < 0.01 level) were found at higher levels in the BV+/G+ group than in the BV+/G- group. The sum of bacterial load (74 species) was higher in the BV+/G+ group than in the BV+/G- group (p < 0.05). The highest odds ratio for the presence of bacteria in vaginal samples (> 1.0 × 104 cells) and a diagnosis of gingivitis was 3.9 for P. bivia (95% CI 1.5–5.7, p < 0.001) and 3.6 for P. disiens (95%CI: 1.8–7.5, p < 0.001), and a diagnosis of BV for P. bivia (odds ratio: 5.3, 95%CI: 2.6 to 10.4, p < 0.001) and P. disiens (odds ratio: 4.4, 95% CI: 2.2 to 8.8, p < 0.001).ConclusionHigher vaginal bacterial counts can be found in women with BV and gingivitis in comparison to women with BV but not gingivitis. P. bivia and P. disiens may be of specific significance in a relationship between vaginal and gingival infections.

RTI/STI prevalence among urban and rural women of Surat: A community-based study

Objectives:To estimate the prevalence of RTI/STI among women in urban and rural areas of Surat and analyze the influence of socioeconomic, socio-demographic and other determinants possibly related to RTI/STI.Method:A community-based cross-sectional study. Women aged 15-49 years (n = 102) were interviewed and underwent a gynecological examination. Specimens were collected for laboratory diagnosis of chlamydia, gonorrhea, trichomonas, bacterial vaginosis (BV), candidiasis, hepatitis B, HIV, and syphilis.Results:Out of 51 women in rural areas, 27 (53%) and among 51 women in urban areas, 35 (69%) were identified having RTI/STI. In total, the prevalence of trichomoniasis was found to be 41% by culture, 22% by wet mount, and 16% by Gram staining among urban women, while trichomoniasis among rural women was found to be 27% by culture, 18% by wet mount, and 14% by Gram staining. The prevalence of candidiasis was found to be 14% among urban women and 12% among rural women. By using Gram staining Nugent's criteria, the prevalence of bacterial vaginosis was found to be 24% among urban women and 25% among rural women. The prevalence of syphilis was found to be 2% by VDRL both among urban as well rural women.

RTI/STI prevalence among urban and rural women of Surat: A community-based study

To estimate the prevalence of RTI/STI among women in urban and rural areas of Surat and analyze the influence of socioeconomic, socio-demographic and other determinants possibly related to RTI/STI. A community-based cross-sectional study. Women aged 15-49 years (n = 102) were interviewed and underwent a gynecological examination. Specimens were collected for laboratory diagnosis of chlamydia, gonorrhea, trichomonas, bacterial vaginosis (BV), candidiasis, hepatitis B, HIV, and syphilis. Out of 51 women in rural areas, 27 (53%) and among 51 women in urban areas, 35 (69%) were identified having RTI/STI. In total, the prevalence of trichomoniasis was found to be 41% by culture, 22% by wet mount, and 16% by Gram staining among urban women, while trichomoniasis among rural women was found to be 27% by culture, 18% by wet mount, and 14% by Gram staining. The prevalence of candidiasis was found to be 14% among urban women and 12% among rural women. By using Gram staining Nugent's criteria, the prevalence of bacterial vaginosis was found to be 24% among urban women and 25% among rural women. The prevalence of syphilis was found to be 2% by VDRL both among urban as well rural women.

Prevalence of Bacterial Vaginosis and Impact of Genital Hygiene Practices in Non-Pregnant Women in Zanjan, Iran

Bacterial vaginosis is one of the most common causes of reproductive tract infection (RTI), it's prevalence is influenced by many factors. The aim of this study is to determine the prevalence of bacterial vaginosis and impact of sexual and genital hygienie practices and socio-demographic characteristics in non pregnant women of Zanjan province in Iran. 500 non-pregnant, married women were randomly selected for this study. This is a descriptive-analytic study conducted among non-pregnant referred to primry healthcare centres in Zanjan between May to August 2006. Following gynecological examination and vaginal sample collection by physicians, bacterial vaginosis was confirmed by Nugent criteria, tricomoniasis by direct microscopy and candidiasis by direct microscopic observation and evaluation of presenting clinical signs of vulvovaginitis. The prevalence of RTI was 27.6%. Out of which 16.2% was devoted to bacterial vaginosis (BV), 6.6% to trichomoniasis and 4.8% to Vulvovaginal candidiasis (VVC). In contrast to coital hygiene, there was a significant correlation between menstrual and individual vaginal hygiene and BV (p<0.01 and p<0.001) respectively. There was a significant correlation between BV and education (p<0.025), number of pregnancy (p<0.05) and method of contraception (p<0.005). No significant correlation was observed between age, age of marriage and abortion. The data obtained suggests that the prevalence rate of BV is relatively high and could be affected by hygiene behaviors and certain socio-demographic characteristics, which indicate the need for comprehensive, scheduled programs of healthcare educations, aimed at reducing BV prevalence.

Preterm Labor: A Review

ABSTRACT Introduction Preterm labor (PTL) is one of the leading causes of perinatal morbidity and mortality. It is one of the major public health problems, especially with reference to mortality, disability and health care expenses. Incidence The overall incidence of PTL is around 10-15% (6-15% Range)3 (The incidence of PTL in our institute (JNMC) was 10.2% during 2006-2007. Out of all PTL 50% occur spontaneously, 25% following preterm prelabor rupture of membranes (PPROM) and another 25% iatrogenic (Induced due to maternal and/or fetal risks). Risk factors Previous history of preterm labor is one of the important risk factor(risk of PTL in subsequent pregnancies is 14.3% and 28% after one and two preterm births. Others include multiple pregnancy, uterine over distension (polyhydramnios, macrosomia and fibroids), uterine anomalies, cervical incompetence, bacterial vaginosis, bleeding in early pregnancy, poor socioeconomic status, elderly and adolescent age group and tobacco use. Predictors Cervical length assessment by USG, fetal fibronectin, vaginal pH are being used. Prevention Progesterone and clindamycin (abnormal vaginal flora) antibiotic is being used with reasonable evidence. Treatment Corticosteroids and antibiotics help in reducing neonatal morbidity and mortality and tocolytics (nifedepine and atosiban are recommended) helps in allowing the steroids to act. Newer developments New predictors like higher vaginal pH (&gt; 4.5) and Gram stain score of 9 to 10 with Nugent criteria in early pregnancy is increasingly associated with preterm labor. Search for selective and safe tocolytic is also under consideration, specially the prostaglandin synthetase inhibitors and the role of potassium channels in myometrium. Conclusion Successful prediction, prevention and treatment of preterm labor has significant influence on the perinatal outcome, health care expenditure and quality of life. As the cause for preterm labor is still an enigma, it is difficult to predict, prevent and treat PTL successfully. At present the treatment of PTL is mainly antibiotics, tocolytics and corticosteroids with varied success.

Alteration in vaginal microflora, douching prior to pregnancy, and preterm birth

We aimed to determine the relationship of douching prior to pregnancy and bacterial vaginosis (BV) during pregnancy on preterm birth, addressing individual and joint effects. We used a prospective cohort study and assessed vaginal microflora using gram stains and Nugent's criteria. Douching behaviour was based on self-report about the 12 months prior to pregnancy. Preterm births were categorised as spontaneous or medically indicated. A total of 2561 women provided vaginal specimens and 1492 provided self-reports on douching behaviour. Bacterial vaginosis assessed at 24-28 weeks' gestation in the absence of douching prior to pregnancy was associated with spontaneous preterm birth (odds ratio = 2.74 [95% confidence interval 1.13, 6.66]) as was douching in the absence of BV (OR = 2.20 [1.29, 3.75]). The combination of BV and douching was unrelated to spontaneous or medically indicated preterm birth. We concluded that acute alterations in vaginal microflora at mid-pregnancy or douching prior to pregnancy were associated with an increased risk of preterm birth, but the combination did not appear to increase the risk further than would be expected.

Midpregnancy Vaginal Fluid Defensins, Bacterial Vaginosis, and Risk of Preterm Delivery

To assess relations among midpregnancy vaginal defensin levels, a component of the host innate immune response, bacterial vaginosis, and risk of preterm delivery. These relations are compared across race groups because previous studies have repeatedly shown that the prevalence of bacterial vaginosis and the risk of preterm delivery are greater in African-American women compared with that in white women. Data are from a prospective study that enrolled pregnant women from 52 clinics in five Michigan communities. In the study subcohort, defensins (human neutrophil peptides 1, 2 and 3) and bacterial vaginosis (Nugent criteria) were measured in vaginal fluid collected at enrollment (15th through 27th week of pregnancy) from 1,031 non-Hispanic white and African-American women (787 term, 244 preterm). Preterm deliveries were categorized by clinical circumstances, ie, spontaneous and medically indicated. Among African Americans, vaginal human neutrophil peptides 1-3 levels greater than or equal to the median were associated with bacterial vaginosis and specifically with spontaneous preterm delivery only (adjusted odds ratio 2.3, 95% confidence interval 1.2-4.3). Once African-American women were stratified by human neutrophil peptide 1-3 levels, bacterial vaginosis added nothing to the prediction of spontaneous preterm delivery risk. None of the above associations were observed in non-Hispanic whites. The relations among human neutrophil peptide 1-3 levels, bacterial vaginosis, and preterm delivery vary by race group. In African Americans, midpregnancy human neutrophil peptide 1-3 levels were more informative to preterm delivery risk than was bacterial vaginosis, suggesting an important role for host response. In addition, elevated human neutrophil peptide 1-3 levels may be a marker for particular high-risk vaginal milieus that are not distinguished by the current bacterial vaginosis Nugent scoring system.

Diagnosis of bacterial vaginosis in the pregnant patient in an acute care setting

To determine the accuracy of clinical criteria relative to Nugent's criteria for diagnosing bacterial vaginosis (BV) in the pregnant patient. This prospective study was conducted in pregnant patients requiring a speculum examination in an ER triage system. Determination was made of vaginal pH, whiff test, clue cells and discharge for use with Amsel's criteria. Diagnosis of BV was made using Nugent's criteria. Data were analyzed with Student's t and chi square statistics. Samples by Nugent's criteria were positive for 32 women out of a sample size of 193 (16.6%). There were no significant differences in chief complaints between women with and without BV. Significantly more women with BV reported odor, but there were no other significant differences in symptoms between women with and without BV. Patients with BV were significantly less likely to have a white discharge. The whiff test was not reported in many cases, however, when a test was recorded, women with BV were significantly more likely to have a positive test. Approximately 50% of the women with BV had either >or=20% clue cells or pH>4.5; only 25% had both. Sensitivities of pH>4.5, pH >or= 4.5, >or=20% clue cells, whiff test and the combination of high pH and clue cells were low (22-81%). Specificities of individual and combined criteria ranged from 68 to 99%. The negative predictive power of pH<4.5 was 95%; 113 women had a pH less than 4.5 and of these women, 107 did not have BV. The negative predictive power of a pH<4.5 is very high, and the majority of women fell into this category. An algorithm for pregnant women could therefore be constructed that would call for pH to be tested. Women with a pH < 4.5 would not receive treatment or undergo further testing. The minority of women with a pH >or= 4.5 would then undergo testing with the Gram stain using Nugent's criteria.

Racial Differences in Bacterial Vaginosis among Pregnant Women: The Relationship between Demographic and Behavioral Predictors and Individual BV-Related Microorganism Levels

To determine predictors of bacterial vaginosis (BV) and the level of three common BV-related microorganisms by racial group. Prospective cohort study of 1,886 pregnant women. BV was measured with Nugent's Gram Stain criteria, smoking status with urinalysis of cotinine levels, and stress with Cohen's perceived stress scale. 73% of the cohort were African-American and 37% were BV positive. Smoking, numerous sexual partners, and single status were related to both BV positivity as well as higher levels of Gardnerella ssp. among African-American pregnant women. Age and history of STD were associated with BV positivity, and history of STD and insurance status were associated with Gardnerella ssp. levels in non-African-American pregnant women. Contrary to prior research, perceived stress and douching were not associated with BV positivity or the level of any of the BV-related microorganisms in this cohort. A greater number of modifiable, behavioral-related risk factors predicted BV and the level of BV-related microorganisms among African-American compared to non-African-American pregnant women. A deeper understanding of predictors of BV and related microorganism levels by racial group may help eliminate critical disparities with respect to BV positivity and adverse pregnancy outcomes, including spontaneous preterm birth.

Changes in the predominant human Lactobacillus flora during in vitro fertilisation

BackgroundSignature matching of nucleotide sequences in the V1 and V3 regions 16S rRNA genes using pyrosequencing technology is a powerful tool for typing vaginal Lactobacilli to the species level and has been used for investigating the vaginal microbial niche.MethodsThis study has characterized the normal cultivable vaginal Lactobacillus flora at varying estradiol levels in plasma; the study comprised 17 patients undergoing ovarian stimulation for In Vitro Fertilization (IVF) treatment. The vaginal status of each participant was initially assessed as normal according to Amsel and Nugent criteria.ResultsL. crispatus, L. gasseri and/or L. jensenii were present in 10 of the patients throughout the study period, and little variation among these three species was encountered in individual patients. The flora of three women was dominated by L. delbrüeckii, L. rhamnosus or L. vaginalis. One woman exhibited a dominance of L. iners. The flora of the remaining three women were initially dominated by L. rhamnosus or L. reuteri, but as their estrogen levels rose, their flora composition altered, to become dominated by one of the three species most common in a normal, healthy vagina.ConclusionSignature matching of nucleotide sequences in the V1 and V3 regions of 16S rRNA genes is a discriminative tool for the study of vaginal Lactobacilli and can be used to track the Lactobacillus flora under a variety of physiological conditions.

The relationship between resolution of asymptomatic bacterial vaginosis and spontaneous preterm birth in fetal fibronectin–positive women

The purpose of this study was to determine the impact of persistent bacterial vaginosis (BV) on the occurrence of spontaneous preterm birth (SPB) in women who test positive for fetal fibronectin. This is a secondary analysis of a subset of pregnant women who tested positive for BV and fetal fibronectin between 16(0/7) and 25(6/7) weeks of gestation and who participated in randomized placebo controlled trials of antibiotic therapy. Nugent's criteria were used for the diagnosis of BV. Patients were reassessed for the presence of BV after treatment. The rate of SPB at <34 weeks of gestation was analyzed on the basis of treatment mode and BV status at the follow-up visit. The primary studies included a total of 3285 women. A subset of 215 women met the criteria for this analysis. Seventy-seven of 100 patients (77%) in the antibiotics group vs 33 of the 115 patients (28.7%) in the placebo group became BV negative (P < .0001). The rate of SPB at <34 weeks of gestation was lower for BV resolution compared with persistent BV (0 vs 5.7%, respectively; P = .01). In women who tested positive for fetal fibronectin and BV, resolution of BV is associated with less SPB before 34 weeks of gestation.

Diagnosis of Bacterial Vaginosis (BV) Using Nugent Criteria and a New Point-of-Care Chromogenic BV Blue Test for Detecting Elevated Vaginal Fluid Sialidase Enzyme

Bacterial vaginosis (BV) is a condition that predisposes women to increased susceptibility to sexually transmitted diseases, including human immunodeficiency virus (HIV) infections and obstetric complications. The etiology of BV is diverse and the diagnostic methods currently adopted include Amsel criteria, and Nugent score (improved Gram stain) that requires microscopy and expert interpretation. We evaluated vaginal swabs from 56 premenopausal women with clinical signs suggestive of BV, using the Nugent criteria and a new BV Blue test for the detection of elevated vaginal fluid sialidase enzyme. For the Nugent criteria, slides were Gram stained and a score of 0-10 was assigned, considering the relative proportions of large Gram positive rods (lactobacilli), small Gram-negative or Gram variable rods and curved Gram-variable rods. The BVBlue test detected the presence of elevated vaginal sialidase enzyme in samples from 49(87.5%)women, compared with Nugent score of 7-10 interpreted as BV occurrence in 36 (64.2%) subjects. The BVBlue test is yet to be introduced in Nigeria as a routine screening BV test, and it is simple, rapid, and objective for the diagnosis of BV. It has the potential to facilitate prompt diagnosis and appropriate treatment of BV in the absence of microscopy. Keywords : Bacterial Vaginosis, Sialidase, Nugent Score Journal of Medical Laboratory Sciences Vol. 14 (1) 2005: pp. 37-42

Targeted PCR for Detection of Vaginal Bacteria Associated with Bacterial Vaginosis

Several novel bacterial species have been detected in subjects with bacterial vaginosis (BV) by using broad-range PCR assays, but this approach is insensitive for detecting minority species. We developed a series of taxon-directed 16S rRNA gene PCR assays for more sensitive detection of key vaginal bacteria. We sought to determine the prevalence of each species in the vagina, its association with BV, and the utility of PCR for the microbiological diagnosis of BV. Targeted PCR assays were developed for 17 vaginal bacterial species and applied to 264 vaginal-fluid samples from 81 subjects with and 183 subjects without BV. The results were compared to those of two widely accepted methods for diagnosing BV, the use of clinical findings (Amsel criteria) and the interpretation of vaginal-fluid Gram stains (Nugent criteria). Leptotrichia/Sneathia, Atopobium vaginae, an Eggerthella-like bacterium, Megasphaera species, and three novel bacteria in the order Clostridiales are among the bacterial species significantly associated with BV. PCR detection of either a Megasphaera species or one of the Clostridiales bacteria yielded a sensitivity of 99% and a specificity of 89% for diagnosis of BV compared to the Amsel clinical criteria and a sensitivity of 95.9% and a specificity of 93.7% compared to the Nugent criteria (Gram stain). PCR detection of one or more fastidious bacterial species is a more reliable indicator of BV than detection of bacteria, such as Gardnerella vaginalis, previously linked to BV, highlighting the potential of PCR for the diagnosis of BV.