European Journal of Obstetrics & Gynecology and Reproductive Biology

Papers
(The median citation count of European Journal of Obstetrics & Gynecology and Reproductive Biology is 0. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-10-01 to 2025-10-01.)
ArticleCitations
Transvaginal cervical cerclage – How well do surgeons assess their own procedures?97
The effect of low-dose aspirin on platelet function during pregnancy compared to placebo: An explorative study83
Perinatal and neonatal outcomes of high-risk asymptomatic women from a specialist preterm birth surveillance clinic80
171 Efficacy and safety of mesh-augmented transvaginal repair with calistar s in non-fertile women with recurrent or complex anterior pelvic organ prolapse according to the scenihr-recommendations on 64
352 Hysteroscopic metroplasty for septate uterus: A retrospective bicentric study involving 519 women48
Serum calcium among women with pre-eclampsia and normotensive pregnant women in kawempe national referral hospital; a case control study46
027 Uterine transplantation in women with MRKH44
377 Risk of adverse perinatal outcome after labor induction in pregnancies complicated by gestational diabetes44
415 Antenatal diagnosis and management of the abdominal wall defects related to the umbilical ring. Case series and review of the literature44
Anti-Müllerian hormone is a predictor of medium-term cumulative live birth following in vitro fertilization/intracytoplasmic sperm injection: A retrospective study39
Considerations of breast cancer survivors to return for embryo transfer after fertility preservation: A qualitative study38
Manual therapy - possible method for premenstrual syndrome relief38
Birth outcomes among pregnancies with covid-19 infection36
Ultrasonographic features of the endometrium following successful medical termination of early pregnancy33
Risks and benefits of hormone replacement therapy in reproductive age women after hematopoietic stem cell transplants: a narrative review32
Evaluation of oncofertility care in girls diagnosed with cancer, the eu-horizon 2020 trel project32
Endometrial cancer as an underlying cause of infertility: case series31
165 Abnormal uterine bleeding in adolescents as a common medical problem of demographic situation in ukraine28
Preeclampsia is caused by impaired placenta – A case report28
429 Diagnostic hysteroscopy and endometrial biopsy in the assessment of intrauterine alterations in infertile patients27
61 Arabin pessary: 5 Years experience of a terciary hospital27
676 Study of immune status in women with non-specific chronic inflammatory diseases26
223 Prenatal diagnosis of trisomy 21-the role of aberrant right subclavian artery (ARSA) As an ultrasound marker26
357 Treatment of breast cancer in elderly patients: A tailored approach26
077 Survey of national pediatric & adolescent gynecology experience in the Republic of Ireland26
565 Fallopian tube cytological findings in women undergoing salpingectomy25
110 The ultrasound and MRI findings in a young girl with an ovarian mass25
100 Lipschütz ulcer in teenagers – Case report25
The effect of preemptive local anesthesia on postoperative pain following vaginal hysterectomy: A randomized controlled trial – Letter to the editor24
Prenatal diagnosis of pseudocoarctaion of the aorta22
309 Keillands forceps: Is it a useful or dangerous instrument? A retrospective analysis of 46 deliveries in sunderland royal hospital between september 2019 - February 202022
45 Does ovarian endometriosis increase oocyte sensitivity to icsi-induced mechanical damage?22
Corrigendum to: “Metformin modulates PI3K and GLUT4 expression and Akt/PKB phosphorylation in human endometrial stromal cells after stimulation with androgen and insulin” [Eur. J. Obstet. Gynecol. Rep21
Training for breech deliveries with the mother in an upright position: An innovative adaptation of a simulation model21
A 2-step remote TUNEL approach for sperm DNA fragmentation assessment. Analysis in donors and patients20
Prediction of fetal growth restriction and small for gestational age by ultrasound cardiac parameters20
The rate of elective cesarean section after pelvic or hip fracture remains high even after the long-term follow-up: A nationwide register-based study in Finland19
Comparison of the efficacy for early warning systems in predicting obstetric critical illness19
Association between polycystic ovary syndrome and the risk of malignant gynecologic cancers (ovarian, endometrial, and cervical): A population-based study from the U.S.A. National Inpatient Sample 20119
Congenital cytomegalovirus infection despite valaciclovir secondary prevention: should we fear antiviral resistance?17
Understanding care-seeking and subsequent pregnancy loss in the second trimester of pregnancy − A multicentre audit17
Could blastocysts derived from abnormal fertilized zygotes be used? A systematic review and meta-analysis17
CTG interpretation templates affect residents’ decision making17
“It’s a breech, and what now?”: A decision-aid tool to help clinicians counsel women with breech presentation near term17
Fetal cardiac rhabdomyoma incidentally associated with Prader-Willi syndrome: A case report17
Mode of delivery predicts postpartum maternal leukocyte telomere length17
Vocalization during the second stage of labor to prevent perineal trauma: A randomized controlled trial16
Is a pregnancy following a second trimester uterine evacuation associated with increased adverse maternal and neonatal outcomes?16
Development of a comprehensive database for research on foetal acidosis16
How do French Obstetrician-Gynaecologists perceive their quality of life? A national survey16
Hormonal IUD is the major hormonal contraceptive method used among women aged 40–49 years: Data from the 2015–16 Tromsø Study, Norway16
Non-invasive management of severe red blood cell alloimmunization during pregnancy16
Early-pregnancy maternal heart rate is related to gestational diabetes mellitus (GDM)16
Increased detection of high grade CIN, when using electrical impedance spectroscopy as an adjunct to routine colposcopy, is maintained when used across international boundaries: Prospective data from 15
Perineal body and anal sphincter biometrics and stiffness using elastography during labor: a feasibility study15
Impact of vaginism on mode of delivery and obstetrical outcomes15
A retrospective observational study of labour ward work Intensity: The challenge of maternity staffing15
Response to the Letter by Yong-Shan Chen and Dong-Zhi Li Regarding Our Publication: “Gestational Diabetes Mellitus and Group B Streptococcus Maternal Colonization”15
Efficacy and safety of elinzanetant in vasomotor symptoms associated with menopause: A meta-analysis of randomized controlled trials15
Smooth muscle tumors of uncertain malignant potential or atypical leiomyomas: A long-term evaluation of surgical outcomes and clinicopathological features15
281. Gynocare cost action ca18117 “european network for gynaecological rare cancer research: From concept to cure”15
Trimester-specific gestational weight gain in women with and without previous bariatric surgeries15
Patient experiences of outpatient hysteroscopy14
Understanding human immunity in idiopathic recurrent pregnancy loss14
O-RADS MRI scoring system has the potential to reduce the frequency of avoidable adnexal surgery14
Is hormonal manipulation after surgical treatment of catamenial pneumothorax effective in reducing the rate of recurrence? A systematic review and meta-analysis14
A nationwide population-based register study of neonatal outcomes in pregnancy-associated Bell’s palsy14
N-terminal prohormone of brain natriuretic peptide in gestational hypertension and preeclampsia – State of the art14
Patient-initiated follow-up in gynaecology: Patient and clinician views14
AI in obstetrics: Evaluating residents’ capabilities and interaction strategies with ChatGPT14
Comparison of complications in very obese women undergoing hysterectomy – Abdominal vs laparoscopic approach with short- and long-term follow-up14
Effect of increased gonadotropin dosing on maternal and neonatal outcomes in predicted poor responders undergoing IVF: follow-up of a randomized trial13
Antenatal corticosteroids - The art of high-risk pregnancies selection13
162 Comparative study of previous pregnant women of COVID-19 care at the intensive care unit in a west hospital in the Western Amazon, In the years 2020/202113
661 Application of 3d-tumor spheroids in drug discovery13
127. Endometrial expression levels of leukemia inhibitory factor (lif) and lif-receptor are significantly decreased in women with recurrent pregnancy loss during implantation window: Pilot results13
Endometrial receptivity and its relationship with clinical factors in patients with recurrent implantation failure13
Gestational diabetes mellitus – Can we do better with postpartum diabetes screening?13
Sotos syndrome: A study of antenatal presentation13
332 Investigation of the factors that affect the success of IVF13
Inside Back Cover - Editors with images13
192. Finding validity in proposed hysteroscopic findings of chronic endometritis13
Fixation of uterosacral ligaments to anterior vaginal wall during modified McCall culdoplasty after vaginal hysterectomy13
Predictions of live birth in IVF programs of patients with recurrent implantation failure13
Top cited articles about the stress urinary incontinence: A bibliometric analysis13
355 Correlation of patient and tumor characteristics with recurrence patterns of patients undergoing pelvix exenteration for gynecologic malignancy: A retrospective cohort study13
119 Combined laparoscopic-mini laparotomy approach for excision of a large dermoid cyst13
323 3D Ultrasound assessment of endometrial receptivity during ivf/icsi cycles13
074 Prepubertal vaginal bleeding associated with use of lavender products: A case-series12
Amniocentesi with cerclage – the way of prevention of premature birth12
Clinical associations of fetal heart rate accelerations as derived from transabdominal fetal electrocardiograms12
Sepsis of unknown origin in pregnancy – mind the oral health care: Case report12
Comparative analysis of European guideline-based clinicopathological risk groups and the International Federation of Gynecology and Obstetrics staging system for endometrial cancer12
400 Oral health awareness among pregnant women in Greece12
Laparoscopic uterine preservation and vaginal reconstruction in a patient with uterus didelphys, vaginal agenesis and bilateral vesicoavginal fistulas12
Is there a synergistic relationship between diaphragm and pelvic floor muscles in pregnant women?12
Stress incontinence combined score (SICS): A novel combined grading system to assess the severity of stress urinary incontinence in women12
Measurement of extraction forces of non-absorbable suture and different anchoring systems used for pelvic organ prolapse surgery using soft-embalmed cadavers: A feasibility study12
Effect of epidural analgesia on postpartum bladder sensation12
Corin—the early marker of preeclampsia in pregestational diabetes mellitus12
107 Human papillomavirus clearence in women of age 17-2512
Ultrasound evaluation of the influence of cube pessary on female’s pelvic floor12
A case of baby with cleft lip and palate from mother with bicornuate uterus. are anatomical fusion anomalies inherited from mother to baby or a coincidence?12
The cost-effectiveness of using a prognosis-tailored strategy model to triage couples with idiopathic infertility for assisted reproduction technology12
Data integrity of 14 randomised controlled trials12
Expert opinion by the Italian Society of Gynecology of the Third Age (SIGiTE) and the Italian Society of Menopause (SIM) on hormone therapy with bioidentical hormones12
Evaluation of laparoscopic cervicosacropexy on sexual function in women with pelvic organ prolapse12
A randomized comparison of a single-incision needleless (Contasure-needleless®) mini-sling versus a mid-urethral sling (Contasure-KIM®): 60-month follow-up results11
Early pregnancy teaching and training amongst obstetric trainees in a tertiary maternity hospital11
Brain tumors in pregnancy, symptoms, diagnosis and our cases11
Guideline-based venous thromboprophylaxis in postpartum women: An in-depth evaluation of ACOG and RCOG recommendations and real-life implementation11
The time has come for a paradigm shift in obstetrics’ medico-legal litigations11
A peculiar case of vasa previa: Placental lake and fetal bridge vessel11
To screen or not to screen for asymptomatic bacteriuria in pregnancy: A comparative three-year retrospective review between two maternity centres11
Evaluation of blood type as a potential risk factor for hemorrhage during vaginal hysterectomy11
Exploring the rationale of performing vaginal hysterectomy under local anaesthesia: A single-centre experience11
High prevalence of low prognosis by the POSEIDON criteria in women undergoing planned oocyte cryopreservation11
Maternal and perinatal outcomes in primiparous singleton pregnancies conceived with assisted reproductive technology in British Columbia11
Investigation of amino acid profile alterations in maternal serum for early diagnosis of anembryonic pregnancy with high performance liquid chromatography-mass spectrometry11
Evaluating the effectiveness of interventions: A comprehensive scoring system versus testing for statistical significance11
Improving trustworthiness in research in Women's Health: A collective effort by OBGYN Editors11
Feasibility of sending a direct send HPV self-sampling kit to long-term non-attenders in an organized cervical screening program10
Neonatal and maternal outcomes with elective cesarean section compared to induction of labor in twin pregnancies: A prospective cohort study10
Effectiveness and complication rates of high intensity focused ultrasound treatment for abdominal wall endometriosis: A systematic review10
The effects of climate change and environmental pollution on human reproduction: A scientific review commissioned by the European Board and College of Obstetrics and Gynaecology (EBCOG)10
Second child after a live birth achieved with assisted reproductive technology: a comparative analysis between endometriosis and other causes of infertility10
Effect of body mass index on surgical outcomes in patients undergoing laparoscopic sacrohysteropexy and sacrocolpopexy10
Retrospective cohort study on the bilateral occurrence of invasive lobular breast cancer10
Investigating the effect of Sulforaphane on AMPK/AKT/NRF2 pathway in human granulosa-lutein cells under H2O2-induced oxidative stress10
The great debate: Surgical outcomes of laparoscopic versus laparotomic myomectomy. A meta-analysis to critically evaluate current evidence and look over the horizon10
The menstrual cup knowledge, attitudes, and behaviors of Turkish women in reproductive age10
Third trimester messenger RNA COVID-19 booster vaccination upsurge maternal and neonatal SARS-CoV-2 immunoglobulin G antibody levels at birth10
Permanent or absorbable suture material for sacrospinous ligament fixation: Does it matter?10
Immediate skin-to-skin contact during cesarean section – A pilot study with simulation characters10
IV iron supplementation, dosage, and timing in pregnancy: A single-institution review on a maternal transfusion reduction bundle10
Sexual dysfunction in patients after cystocele surgery. Is the g-spot a myth or reality?10
Fetal intrahepatic Umbilical-Porto-Systemic venous shunts (IHUPSVS): In-utero anatomic classification10
Vulvar necrotizing wounds: Unveiling mortality-associated parameters and assessing the efficacy of VAC therapy10
Pharmacokinetics of low-dose aspirin for the prevention of preeclampsia10
Women with persistent/recurrent vaginal discharge should be offered multiplex-7 PCR testing10
Risks factors for anastomotic leakage in advanced ovarian cancer: A systematic review and meta-analysis10
Retraction notice to “Can flowcytometric DNA studies forecast the prognosis of endometrial hyperplasia?” [Eur. J. Obstet. Gynecol. Reprod. Biol. 122 (2005) 104–106]10
A systematic review and meta-analysis examining the role of zinc supplementation in ameliorating physical and psychological manifestations of premenstrual syndrome in young females10
Biomarker identification for endometriosis as a target for real-time intraoperative fluorescent imaging: A new approach using transcriptomic analysis to broaden the search for potential biomarkers10
Spontaneous double ectopic pregnancy of the cervix and right adnexa10
Maternal gut microbiota in the postpartum Period: A Systematic review10
Paraneoplastic syndromes in ovarian carcinoma: A study on clinical spectrum, treatment and survival perspectives10
Sexuality after breast cancer treatment: A physician’s survey of current clinical practice10
Atypical epithelioid trophoblastic lesion presenting as pseudocyst from the niche in the cesarean scar: A case report and review of the literature10
Impact of first-trimester mechanical cervical dilatation during curettage on maternal and neonatal outcomes: A retrospective comparative study10
Fetal agenesis of the corpus callosum: Clinical and genetic analysis in a series of 40 patients10
Inhaled methoxyflurane (Penthrox®) as a novel pain relief for outpatient hysteroscopy and other gynaecological procedures10
A novel obstetrical surgical intervention – New episiotomy: Case series study9
On importance of consistent terminology and mutual understanding9
Concentrations of heat shock protein 70 (hsp70) in pregnant women with gestational arterial hypertension9
283 The effect on cervical ripening on the post-term induction rate9
383. Unscheduled bleeding on hormone replacement therapy: is it a cause for concern?9
Effect of digital medical education in improvement of evidence based knowledge for gynecologists taking international memership exams9
Urethral funneling changes after successful and unsuccessful tvt implantation in women with stress urinary incontinence9
Can contrast-enhanced ultrasound differentiate cervical lesions?9
When is it necessary to perform biopsy in asymptomatic postmenopausal women with incidental finding of thickened endometrium?9
Inter- and intra-observer reliability in first-trimester uterine artery Doppler measurements9
050 Normal menstrual cycles9
204 1p36 Deletion syndrome – A case report9
Needleoscopic-assisted risk-reducing bilateral salpingo-oophorectomy in BRCA1/2 mutation carriers: Peri-operative outcomes and psychological impact9
A mixed method, phase 2 clinical evaluation of a novel device to treat postpartum haemorrhage9
Corrigendum to “The Italian guidelines on ultrasound in obstetrics and gynecology: Executive summary of recommendations for practice” [Eur. J. Obstetrics Gynecol. 279 (2022) 176–182]9
52. Prenatal evaluation of lethal and non-lethal congenital anomalies with new indices and multidisciplinary decision-making9
002 The sequence of central obesity, rapid maturation, and polycystic ovary syndrome in [LDQUO]mismatch[RDQUO] girls9
197 Pulmonary valve agenesis updating the genetic basis a case report and literature review9
Labour induction treatment guidelines across Europe: A review9
118 Contraception practice and knowledge of IUD among teenagers and young women9
Obstetric outcomes after conservative management of ovarian borderline tumors in women of reproductive age: A single center experience9
The impact of D-dimer monitoring combined with anticoagulation therapy on pregnancy outcomes and complications in recurrent spontaneous abortion: A case-control study9
The sFLT-1/PLGF ratio values within the <38, 38–85, >85 brackets as compared to perinatal outcomes9
Ultrasound evaluation of the fetal fat tissue, heart, liver and umbilical cord measurements in pregnancies complicated by gestational and type 1 diabetes mellitus – Potential application in the fetal 9
Corrigendum to “Research priorities for maternal and perinatal health clinical trials and methods used to identify them: A systematic review” [Eur. J. Obstetrics Gynaecol. 280 (2023) 120–131]9
How to predict the follow up based on prenatal diagnosis of severe birth defects?9
67 Clinico-morphological features of the uterine scar tissue after argon plasma coagulation9
183 Physical activity routine during pregnancy in greece: a cross-sectional study9
The 17 years of experience in intrauterine myelomeningocele repair in fetal surgery center bytom poland9
Spontaneous healing of uterine rupture causing postpartum hemorrhage9
The prognostic significance of heart rate variability in pregnant patients and newborns9
Maternal thyroid function and free beta human chorionic gonadotrophin level in triploid pregnancies of paternal origin9
Intra-ovarian infusion of autologous platelet-rich plasma in women with poor ovarian reserve: A before and after study9
A bibliometric analysis on laparoscopic pelvic floor surgery from 1996–20229
The role of ultrasonographic-guided insertion of cervical ripening balloon: A prospective study9
ChatGPT for guidance during unexpected labour: Comment9
Preeclampsia risk in oocyte donation versus double gamete donation pregnancies: A systematic review and meta-analysis8
The role of maternal age, markers of ultrasound, sFlt-1 and CA125 serum levels in the prediction of miscarriage: Study acronym: MIS-CARE (markers of ultrasound, immunologic and serum factors in the co8
Comparison of single- and double-dose methotrexate protocols for treatment of pregnancy of unknown location8
Laparoscopic cervico-isthmic cerclage: A “Needle-free” approach for managing cervical insufficiency in pregnant and non-pregnant patients8
Calprotectin levels in amniotic fluid in relation to intra-amniotic inflammation and infection in women with preterm labor with intact membranes: A retrospective cohort study8
Higher serum progesterone level has no negative impact on live birth rate in frozen embryo transfer8
Modeling the future workforce of obstetrics and gynecology in Belgium: From population ratio to gap analysis between supply and demand8
Research priorities for maternal and perinatal health clinical trials and methods used to identify them: A systematic review8
Comparison of SGA and Severe SGA rates using six size standards – Is there a difference?8
Does weight loss in women with obesity induce regression of endometrial hyperplasia? A systematic review8
Case report of long-term pelvic organ prolapse outcomes after uterine-sparing reconstructive surgery and subsequent vaginal delivery: Changing tides8
Research misconduct: Use of generative artificial intelligence in writing may lower the threshold8
PCOS patients differ in meal timings rather than total caloric or macronutrient intake in comparison to weight matched controls8
Access, availability, and quality of service provision women and men experiencing problems related to their sexual health across Europe: Time to act in the wake of a survey on sexual and reproductive 8
Low serum progesterone on day of transfer adversely impacts ongoing pregnancy rates in hormonally prepared single blastocyst frozen embryo transfer cycles8
Long-term outcomes and quality of life after Manchester procedure for pelvic reconstructive surgery in women with cervical elongation8
Daily patient flow unevenness in different sized delivery hospitals – An 11-year register study of 610 227 deliveries8
CD63 as a potential biomarker for patients with ovarian cancer8
Successful implementation of new Swiss recommendations on breastfeeding of infants born to women living with HIV8
INDEX (Induction Experience) assessment of how women feel about induced labour: A prospective observational study8
Alpha-fetoprotein (AFP) is reduced at 36 weeks’ gestation in pregnancies destined to deliver small for gestational age infants8
Three-dimensional transvaginal ultrasound versus MRI in the diagnosis and classification of congenital uterine anomalies: A systematic review and meta-analysis8
Prenatal manifestations of 3q29 deletion: A potential relationship with enlarged nuchal translucency8
Vacuum-assisted birth in maternal lateral posture versus lithotomy. A simulation study8
Predictive factors of endometrial lesions in patients with abnormal uterine bleeding8
“I didn’t feel I could say no”: A qualitative study of pregnant women’s experiences of consent to vaginal examinations8
Numerical and structural chromosomal anomalies in first trimester products of conception8
Prevalence and burden of nausea and vomiting in pregnant women: Interim analysis of the PURITY survey8
Perinatal survival among very preterm singletons born after detection of early-onset fetal growth restriction with or without maternal hypertensive disorders: A population-based study in France8
Two MMP2 gene polymorphisms significantly associated with polycystic ovary syndrome: A case-control analysis8
Intraoperative tumor spill during minimally invasive hysterectomy for endometrial cancer: A survey study on experience and practice8
Normalization of subendometrial peristalsis in women with a large uterine niche following laparoscopic niche repair: A prospective cohort study8
POMMS: Pre-operative misoprostol in myomectomy surgery: A randomised controlled pilot study8
Relationships of diastasis recti abdominis with stress urinary incontinence and pelvic floor muscle dysfunction in postpartum women8
Simulation training for obstetric emergencies in low- and lower-middle income countries: A systematic review8
Rational approach to fetal heart rate monitoring and management during the second stage of labor8
102 Should antenatal care incorporate periodontal assessment?7
120 Diagnostic approach in pediatric patients with abnormal ovarian masses7
Chorioamnionitis and its association with neonatal and maternal adverse outcomes in women with and without epidural analgesia administration7
Cervical cancer during the covid pandemic: Are patients presenting with more advanced or larger tumours?7
294. Abdominal radical trachelectomy as a fertility-sparing treatment for early-stage cervical cancer; a single institution experience7
068 Is MRKH a barrier for regular gynecologic care?7
Lateral suspension with v-notes technique (v-nt)7
Osteopathic approach as an additional therapy of infertility in women with PCOS7
Uterine perforation during hysteroscopy and dilation and curettage and its management7
254 Rate of caesarian sections under general anaesthesia in malta- an audit7
124 A cross-country comparison of the impact of covid-19 on socioeconomical, psychological, and relational well-being of pregnant and non-pregnant women in latvia and portugal7
359 Lynch syndrome and breast cancer: Our experience7
205 Sars-cov-2 reinfection in pregnancy – A case report7
Use of diode laser in hysterotomy during open fetal surgery for myelomeningocele - a case report7
Neonatal outcomes in planned versus emergency cesarean deliveries for placenta praevia7
Hypertension in pregnancy: Obstetric interventions and neonatal outcomes – A retrospective study7
Audit on Management of Reduced Fetal Movements, Mater Dei Hospital (Malta)7
Analysis of the course of pprom pregnancy7
260 Magnetic resonnance imaging evaluation of cervical length by the women[StQuote]s age: A retrospective cohort study7
Letter to Editor: Asymptomatic CMV infection at birth following maternal infection, valacyclovir treatment, and a subsequent negative amniocentesis7
116 Experience of patients attending the National Maternity Hospital for gender affirmation surgery7
372. Use of reproductive health services among women initiating long-acting reversible contraception free-of-charge or continuing or initiating short-acting contraceptive methods – A cohort study from7
Rare case of postnatal diagnosed twin anemia-polycythemia sequence in mcda twins with normal mca -psv Doppler7
220. Induction of labour and nulliparity: A nationwide clinical practice evaluation7
Comparing the efficacy of synthetic osmotic dilators with foley cathether and dinoprostone insert for cervical ripening in term pregnancies7
099 Vulvovaginitis in prepubertal girls. Is haemophilus influenzae really a pathogen?7
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