Comparison between olfactory function of pregnant women and non-pregnant women in reproductive age group in Ibadan, Nigeria.

BACKGROUND: Pregnant women require normal olfactory function in order to develop good appetite for healthy living and normal fetal development. This study was carried out to investigate and compare olfactory function of pregnant women with non-pregnant women. METHODS: This was a case control study of women in reproductive age group at the University College Hospital, Ibadan, Nigeria from July 2014 to February 2015. Consecutive 70 pregnant women and 70 non-pregnant women (controls) without rhinologic symptoms were studied. A structured questionnaire was administered to obtain participants' information on socio-demographics, pregnancy history, and ability to perceive smell. They subjectively rated their olfactory function on a visual analogue scale of 0 - 100. Olfactory threshold (OT), discrimination (OD), identification (OI) scores and TDI of both groups were determined with"Sniffin' sticks"kits and compared. The level of significance was P<0.05. RESULTS: The mean age of the pregnant women was 30.5±3.9years and control was 28.5±6.6years. There were more pregnant women (7.1%) with hyposmia than the non-pregnant women (2.9%). The subjective rating of olfactory function was 68.2±24.9 (median 70) and 72.3±21.6 (median 69) in pregnant women and controls respectively. The mean OT, OD, OI, TDI scores were higher in pregnant women than the controls. However, it was only in OI (P=0.000) and TDI (P=0.012) that the differences were significant. CONCLUSIONS: Pregnant women have olfactory dysfunction more than the non-pregnant women of reproductive age group. Also, they have tendency to develop loss of cognitive olfactory information more than the non-pregnant women.

Comparison between olfactory function of pregnant women and non-pregnant women in reproductive age group in Ibadan, Nigeria

Background: Pregnant women require normal olfactory function in order to develop good appetite for healthy living and normal fetal development. This study was carried out to investigate and compare olfactory function of pregnant women with non-pregnant women. Methods: This was a case control study of women in reproductive age group at the University College Hospital, Ibadan, Nigeria from July 2014 to February 2015. Consecutive 70 pregnant women and 70 non-pregnant women (controls) without rhinologic symptoms were studied. A structured questionnaire was administered to obtain participants' information on socio-demographics, pregnancy history, and ability to perceive smell. They subjectively rated their olfactory function on a visual analogue scale of 0 ­ 100. Olfactory threshold (OT), discrimination (OD), identification (OI) scores and TDI of both groups were determined with"Sniffin' sticks"kits and compared. The level of significance was P<0.05. Results: The mean age of the pregnant women was 30.5±3.9years and control was 28.5±6.6years. There were more pregnant women (7.1%) with hyposmia than the non-pregnant women (2.9%). The subjective rating of olfactory function was 68.2±24.9 (median 70) and 72.3±21.6 (median 69) in pregnant women and controls respectively. The mean OT, OD, OI, TDI scores were higher in pregnant women than the controls. However, it was only in OI (P=0.000) and TDI (P=0.012) that the differences were significant. Conclusions: Pregnant women have olfactory dysfunction more than the non-pregnant women of reproductive age group. Also, they have tendency to develop loss of cognitive olfactory information more than the non-pregnant women

The prevalence and outcome of asymptomatic chlamydial infection screening among infertile women attending gynecological clinic in ibadan, South west Nigeria.

BACKGROUND: Chlamydial trachomatis infection is the most common cause of tubal infertility among women world-wide. Serological diagnosis of Chlamydial infection that may suggest previous, persistent or on-going infection is now incorporated into routine pre-treatment evaluation of infertile women including assisted conception. AIM: The aim of this study is to determine the prevalence and predictors of asymptomatic Chlamydial infection screening among infertile women and also to compare the screening outcome with findings on hysterosalpingogram (HSG). SUBJECTS AND METHODS: This was an observational study conducted among 132 infertile women that were attending Adeoyo Maternity Hospital Ibadan. A total volume of 2-3 ml of venous blood was collected for Chlamydia serology using ImmunoComb Bivalent immunoglobulin G kit (Code 50416002) and the results were compared with their HSG. Other information collected was socio-demographics and clinical parameters. Descriptive, bivariate and multivariate tests were performed using Statistical Package for the Social Sciences 15.0 (Chicago, IL USA) and statistical significance was set at (P < 0.05). RESULTS: A total of 130 women were studied with a mean age of 31.6 years (standard deviation = 4.7). Majority - 72.0% (95/132) - had been infertile for 5 years or less. The prevalence of Chlamydial trachomatis was 20.5% (27/132). Bivariate analysis between the biosocial variables and serology result showed a significant association with education (P < 0.01) and religion (P < 0.01). Logistic regression analysis revealed that Muslim women were 3.6 times more likely than Christians to have positive Chlamydial serology result (95% confidence interval odds ratio = 1.18-11.11). Of those with HSG result (64), the accuracy of the test kit showed low sensitivity - 44.2% (19/43) and negative predictive value 40.0% (16/40) (but, high specificity - 76.2%(16/21), and positive predictive value - 79.2% (19/24). CONCLUSION: Asymptomatic Chlamydial infection is common among infertile women and it positively predict HSG blockage. The serological test may prove invaluable in predicting the presence of tubal blockage; therefore, prophylactic antibiotics may be justified to be included in their care.

Sublingual misoprostol to decrease blood loss after caesarean delivery: a randomised controlled trial.

The aim of the study was to compare the efficacy of sublingual misoprostol in addition to intravenous oxytocin, with oxytocin alone, in reducing blood loss during and following caesarean section. A total of 120 women undergoing caesarean delivery at the University College Hospital, Ibadan, were randomised into two equal groups. In Group A, 20 IU of intravenous oxytocin was given after umbilical cord clamping, while in Group B, the women received 400 µg misoprostol sublingually and 20 IU oxytocin intravenously. The outcome measures were blood loss, additional uterotonics, change in packed cell volume and side-effect profile. Associations between variables were determined by the χ(2) and Student's t-test. Relative risks were calculated for side-effects; the level of significance was p < 0.05. Intraoperative and postoperative blood loss were significantly lower in Group B (451.3 ml vs 551.2 ml, p = 0.007; 22.7 vs 42.2 ml, p < 0.001, respectively). In Group B, women were 7.4 (p < 0.001) and 9.0 (p = 0.008) times more likely to experience shivering and fever, respectively. The need for additional uterotonics was greater in the oxytocin group (66.7% vs 27.6%, p < 0.001). The addition of sublingual misoprostol to intravenous oxytocin reduces postpartum blood loss and the need for additional uterotonics. There is however, an increased risk of shivering and fever with this combination.

Viral infections among couples for assisted reproduction in a fertility clinic in Nigeria.

CONTEXT: The risk of laboratory cross-contamination may limit the availability of assisted conception for couples infected with chronic viruses. However, assisted conception is the standard of care for people living with human immunodeficiency virus (HIV) to minimize risk of transmission or reinfection. AIMS: To assess the burden of viral infection among couples that present for assisted reproductive technology (ART) with a view to evaluating implications for their care. SETTINGS AND DESIGN: A cross-sectional descriptive study carried out among 138 couples at a private fertility clinic in Nigeria. MATERIALS AND METHODS: Screening for HIV, hepatitis B virus (HBV) and hepatitis C virus were carried out among these clients. The males' seminal parameters were analyzed according to World Health Organization (WHO) criteria. STATISTICAL ANALYSIS USED: Statistical Package for Social Sciences was employed. Analysis was by Chi-square test; statistical significance was set at 0.05. RESULTS: Viral infections were found in 10/138 women (7.2%) and 15/138 (10.9%) men. The most prevalent infection was HBV. Twenty-one couples were sero-discordant. Two couples had concordant HIV and HBV infections, respectively. There was no significant association between sperm quality and chronic hepatitis infection. CONCLUSION: Nearly a fifth of the couples had at least one partner infected with a chronic virus - a proportion significant enough to demand attention. Apart from separate laboratory and storage facilities, basic principles to minimize transmission are recommended: HBV vaccination in sero-discordant partners of HBV carriers (and immunoprophylaxis for the baby) and antiretroviral therapy for HIV-positive partners to reduce the viral load before fertility treatment is commenced.

Risk of anaemia in HIV positive pregnant women in Ibadan, south west Nigeria.

UNLABELLED: Anaemia in pregnancy is an important cause of maternal and neonatal mortality. It is a recognized co-morbidity of HIV infection. This study aimed to determine the risk of anaemia in HIV positive pregnant women. METHODOLOGY: This is a cross sectional study of healthy pregnant women attending Adeoyo Hospital, a secondary health centre in South-western Nigeria over a 1-month period (January 2007). During the study period, 2737 eligible women presented for antenatal care. About 98% (2682) of these women consented to HIV testing. Over all, their mean (+ S.D) packed cell volume was 30.96% (+/- 4.13). The prevalence of HIV infection was 2.9% (95% CI 2.3% - 3.6%) and the overall prevalence of anaemia was 33.1%. Frequency of anaemia was significantly higher in HIV +ve women (57.3% vs. 42.7%, p = 0.00. OR = 2.81., CI = 1.72-4.58). HIV +ve women presented more frequently with moderate or severe anaemia. In the logistic regression analysis only HIV infection (OR = 2.4, 95% CI = 1.37-4.21) and primigravidity (OR = 1.25, 95% CI = 1.04-15.2) remained independently associated with anemia. Anaemia is common in HIV positive pregnant women in this environment. Care providers must endeavor to determine the HIV status of every pregnant woman especially if she presents with anaemia with a view to providing appropriate interventions.

Prevalence and pattern of violence in pregnancy in Ibadan, South-West Nigeria.

Violence against women is embedded in most cultures with pregnancy associated with higher rates. This study assessed the pattern of violence in pregnancy in two maternity centres in Ibadan, Nigeria. This was a cross-sectional study of antenatal clinic attendees, between 1 and 31 March, 2007 at the University College Hospital (UCH) and the Adeoyo Maternity (AMH). By systematic random sampling, 404 women were interviewed. Analysis was done by means, χ(2)-test (at 5% level of significance) and logistic regression. At UCH and AMH, 156 (38.7%) and 248 (61.3%) were studied, respectively. The prevalence of abuse was 17.1% (69 women). The perpetrator was most often an intimate partner (48, 66.1%). The commonest act of violence was a threat of abuse (23, 33.3%). The most frequent reason for the abuse was demand for money. Women in polygamous unions (p = 0.035), attending Adeoyo hospital (p = 0.00) or with secondary school or less education (p = 0.004) had higher levels of abuse. Regression analysis revealed women attending AMH were 3.6 times more likely to be abused (95% CI for OR = 1.69-7.81). Violence is not uncommon in this population. Education and employment may reduce these acts.

Knowledge and utilization of malaria control measures by pregnant and newly delivered mothers in Ibadan, Nigeria.

BACKGROUND: The World Health Organisation (WHO) guidelines for the control of malaria during pregnancy include prompt and effective case management of malaria combined with prevention of infection by insecticide-treated nets (ITNs) and intermittent preventive treatment in pregnancy (IPTp). Despite this the uptake is poor. OBJECTIVE: To describe the malaria prevention measures utilized by these women in this environment. METHODS: Information was obtained from consented pregnant and newly delivered women on their socio-demographic characteristics, knowledge and use of malaria chemoprophylaxis RESULTS: One Thousand three hundred thirty (1330) pregnant and newly delivered women in 132 facilities within the Ibadan metropolis were surveyed. The mean age of the respondents was 29. 67 years (±5.21). The modes of prevention most commonly reported as being effective were the use of insecticide spray, window nets and ITN. Only 28.2% were using ITNs in the index pregnancy, and 67.2% of the women had had a drug administered for prophylactic purposes in the index pregnancy. CONCLUSION: This study demonstrates awareness but poor use of control measures. Additionally, there is poor use of the recommended agent for IPT. The factors militating against the use of these preventive measures need to be urgently explored and addressed.

Service uptake and performance of the prevention of mother-to-child transmission (PMTCT) programme in Ibadan, Nigeria.

The Prevention of Mother to Child Transmission (PMTCT) programme in the University College Hospital (UCH), Ibadan has been in existence for more than five years and has scaled up to other sites. The study evaluated the service uptake and performance of the programme using national key indicators. Antenatal and delivery records of women enrolled between July 2002 and June 2007 were reviewed. A total of 51952 women attended first antenatal visits and received HIV pre-test counselling. Of these, 51614 (99.5%) accepted HIV test and 49134 (95.2%) returned for their results. Out of the tested patients, 2152 (4.2%) were identified to be HIV positive. Partners of positive patients accepting HIV testing were 361 (16.7%) with 87 (18.6%) testing positive. There were a total of 942 deliveries out of which 39.2% of the mothers and 95.2% of the babies respectively received ARV prophylaxis. In all, 85.8% (788/918) of the mothers opted for formula as the method of infant feeding. Out of the 303 babies eligible for ELISA testing, 68.3% reported for the test and 17 (8.7%) tested positive. There has been progress in the programme, reflected in the increase in the number of new clients accessing the PMTCT service. However, partner testing and follow up of mother-infant pairs remain formidable challenges that deserve special attention.

Attitude of infertile women to child adoption in Nigeria.

Infertility has serious consequences especially in Africa where a high premium is place on child bearing. An interviewer-administered questionnaire was administered on 396 consenting women seeking infertility treatment at the gynaecological clinic of the University College Hospital, Ibadan in an attempt to assess the attitude of infertile women in Nigeria to child adoption and its acceptability as a management option for infertility. Most (64%) believed its culturally unacceptable and only 17% will try it as an option. Sustained advocacy, community mobilization and enactment of supportive laws were some of the suggestions made by respondents to improve its uptake.

Human immuno-deficiency virus and hepatitis B virus coinfection in pregnancy at the University College Hospital, Ibadan.

Human Immuno-deficiency virus (HIV) and Hepatitis B Virus (HBV) share common modes of transmission which include blood borne and the vertical routes. Although, the natural course of HIV does not appear altered by HBV, the rate of liver-related deaths is several times higher among HIV/HBV co-infected persons. Clinicians providing care for HIV positive individuals, including pregnant women, need to be aware of this problem. This is a 2-year cross-sectional study that commenced in January 2006, among HIV positive pregnant women seen at the University College Hospital, Ibadan. During the study period, 721 HIV positive pregnant women were screened for hepatitis B virus infection. Sixty-four women (8.9%) were positive for HBsAg, 14(1.9%) were HCV positive and 642 (89.2%) were negative for both HBV and HCV. One patient was positive forboth HBV and HCV. There were no remarkable differences between HIV infected and HIV-HBV coinfected patients in terms of the hematological, albumin and bilirubin measurements. Alanine transaminase was however higher in the HIV-HBV co-infected patients than HIV patients and this was statistically significant (17.5 iu/ ml vs. 15.0 iu/ml, p value--0.009). In addition, the CD4 cell count was lower and the viral load marginally higher in the hepatitis B virus positive patients. The differences were however not statistically significant (p value--0.114 and 0.644 respectively). HIV-HBV co-infection in HIV positive pregnant women is not of negligible proportions as demonstrated in this study. Thus, HIV positive pregnant women should be screened for HBV and assisted to access care targeted at preventing morbidity and vertical transmission.

The learning curve of radical hysterectomy for early cervical carcinoma.

Cervical cancer remains a public health concern in developing countries that lack the wherewithal to cope with the associated challenges. Screening for premalignant cervical lesions and offering definitive care for early disease is the key to preventing the scourge. We conducted an audit of the radical hysterectomies performed on account of early cervical carcinoma at our centre between September 2006 and August 2008, following capacity-building by Operation Stop Cervical Cancer. Ten women aged 35 to 60 years were managed. All had type III radical hysterectomy. Three patients had adjuvant teletherapy (one was stage IIb, diagnosed intra-operatively). There was a linear reduction in the surgical blood loss and duration of surgery. Average blood loss was 1500 mls; four had blood transfusions. One case was complicated with rectovaginal fistula (the woman with stage IIb disease) and another had bilateral lymphoedema and left lower limb sensory neuropathy. There was no tumour recurrence on follow-up. Definitive surgery for early cervical cancer is feasible in developing countries despite limited resources. Audit of surgical care of cervical cancer will assist in strengthening the scarce skill. Determination of suitable cases during preoperative evaluation is crucial to the success of the surgery.

Service uptake and performance of the prevention of mother-to-child transmission (PMTCT) programme in Ibadan, Nigeria

The Prevention of Mother to Child Transmission (PMTCT) programme in the University College Hospital (UCH); Ibadan has been in existence for more than five years and has scaled up to other sites. The study evaluated the service uptake and performance of the programme using national key indicators. Antenatal and delivery records of women enrolled between July 2002 and June 2007 were reviewed. A total of 51952 women attended first antenatal visits and received HIV pre-test counselling. Of these; 51614 (99.5) accepted HIV test and 49134 (95.2) returned for their results. Out of the tested patients; 2152 (4.2) were identified to be HIV positive. Partners of positive patients accepting HIV testing were 361(16.7) with 87 (18.6) testing positive. There were a total of 942 deliveries out of which 39.2of the mothers and 95.2of the babies respectively received ARV prophylaxis. In all; 85.8(788/918) of the mothers opted for formula as the method of infant feeding. Out of the 303 babies eligible for ELISA testing; 68.3reported for the test and 17(8.7) tested positive. There has been progress in the programme; reflected in the increase in the number of new clients accessing the PMTCT service. However; partner testing and follow up of mother-infant pairs remain formidable challenges that deserve special attention

Risk of anaemia in HIV positive pregnant women in Ibadan, south west Nigeria

UNLABELLED: Anaemia in pregnancy is an important cause of maternal and neonatal mortality. It is a recognized co-morbidity of HIV infection. This study aimed to determine the risk of anaemia in HIV positive pregnant women. METHODOLOGY: This is a cross sectional study of healthy pregnant women attending Adeoyo Hospital, a secondary health centre in South-western Nigeria over a 1-month period (January 2007). During the study period, 2737 eligible women presented for antenatal care. About 98% (2682) of these women consented to HIV testing. Over all, their mean (+ S.D) packed cell volume was 30.96% (+/- 4.13). The prevalence of HIV infection was 2.9% (95% CI 2.3% - 3.6%) and the overall prevalence of anaemia was 33.1%. Frequency of anaemia was significantly higher in HIV +ve women (57.3% vs. 42.7%, p = 0.00. OR = 2.81., CI = 1.72-4.58). HIV +ve women presented more frequently with moderate or severe anaemia. In the logistic regression analysis only HIV infection (OR = 2.4, 95% CI = 1.37-4.21) and primigravidity (OR = 1.25, 95% CI = 1.04-15.2) remained independently associated with anemia. Anaemia is common in HIV positive pregnant women in this environment. Care providers must endeavor to determine the HIV status of every pregnant woman especially if she presents with anaemia with a view to providing appropriate interventions

Maternal and fetal outcomes of jaundice in pregnancy at the University College Hospital, Ibadan.

OBJECTIVE: This study is aimed at determining pregnancy outcome of cases of jaundice in pregnancy over a 10 year period at the University College Hospital, Ibadan. METHODOLOGY: All case records of patients with jaundice in pregnancy over a 10-year period from 1st January 1992 through 31st December 2001 were retrieved from the medical records office of the hospital and analysed. RESULTS: During the ten-year study period, there were 16,566 registered pregnancies in the hospital, and 52 cases of jaundice in pregnancy were seen, giving an overall incidence of 0.3% or 1 in 318 deliveries. However, 48 case records were retrievable. Viral hepatitis was the commonest cause accounting for 58.3% of cases. It was followed by malaria and sickle-cell anaemia with 20.8% and 16.7% respectively. Other causes include sepsis 14.6%, cholestasis 6.3%, and Pre-eclampsia 2.1%. Preterm delivery occurred in 39.6%, while intrauterine fetal death (IUFD) occurred in 8.3% of cases, all occurring in the third trimester. A case of early neonatal death was recorded. There was no maternal death and the mean hospital stay was 18 days (range 4-45 days) during admission. CONCLUSION: Viral hepatitis, malaria and sickle-cell anaemia are the leading causes of jaundice in pregnancy. These should be promptly diagnosed, investigated and appropriate management instituted as most of the perinatal deaths can be avoided by close fetal monitoring especially in the third trimester and with recourse to early delivery before fetal demise occurs.

Emergency obstetric patients in developing countries and prevalence of HIV infection.

The availability of VCT for HIV for booked antenatal patients offers a unique opportunity for best obstetrics practice but not for patients presenting with emergencies and unknown HIV status. Health workers who attend to such patients are at higher risk of acquiring HIV infections. Between 1st March 2005 and 30th September 2007, unbooked emergency obstetric patients in the labour ward of a teaching hospital who consented were tested using double rapid immunodiagnostic technique and confirmed by Western Blot. HIV positive patients were post-test counselled and offered single dose nevirapine tablet (200 mg) in labour with syrup given to the baby at birth at 2 mg/kg followed by syrup zidovudine for 6 weeks. The results showed that 275 (89.0%) of the 309 women pre-test counselled agreed to testing. The mean age of clients was 27.7 years (+/- 4.4 SD). The mean gestational age at presentation was 36.4 weeks (+/- 4.2 weeks). Primigravidae constituted 37.5% of the patients. Twenty-one (7.6%) of these consenting patients were HIV positive. In conclusion, the HIV prevalence of 7.6% among these unbooked obstetric patients is higher than the 4.7% among our booked antenatal patients and National prevalence of 4.4%. This poses substantial risk of transmission of HIV to attending health workers considering the readiness with which needle prick accident can occur in emergency situations.

Determinants of post-caesarean wound infection at the University College Hospital Ibadan Nigeria.

OBJECTIVE: To determine the risk factors that predispose patients to post-caesarean wound infection at a tertiary health institution in developing country. METHOD: It was an observational study of all women that had caesarean (elective and emergency) delivery between July and September, 2004. The outcome of their post-caesarean wound was assessed. Statistical analysis (Bivariate and logistic regression) of the identified risk factors in patients who developed wound infection was performed at a 95% level of confidence. RESULTS: The post-caesarean wound infection rate was 16.2%. The identified risk factors were lower educational status, multiple pelvic examination, offensive liquor at surgery and patients that are unbooked. Following logistic regression, women with up to primary school were 20 times more likely than those with secondary education and above to develop wound infection (95% CI OR = 1.8 to 250.0). CONCLUSION: The outcome showed that the identified determinants of post-caesarean wound infection were comparable with earlier reports. Women with lower educational status are more at risk in this study. Therefore, these women need special attention to reduce the risk.

Awareness and desirability of labor epidural analgesia: a survey of Nigerian women.

BACKGROUND: Pain relief is an integral part of labor management. Epidural analgesia is the most effective form of pain relief, but in most Nigerian obstetric units it is not available. There is little information on the views of pregnant women about epidural analgesia during labor. METHODS: A cross-sectional survey using a structured questionnaire was conducted in the antenatal clinic of University College Hospital, Ibadan, Nigeria to assess women's views about epidural analgesia. RESULTS: Of the 650 women surveyed, 523 (80.5%) had knowledge of labour pain while only 127 women (19.5%) were aware of epidural analgesia. Knowledge was affected by parity. Awareness of epidural analgesia was related to occupational status (OR 11.00, 95% CI 5.31-22.83) and having previously experienced childbirth on one previous occasion (OR 1.75, 1.05-2.92). A total of 103 (15.8%) respondents wanted to receive epidural analgesia in their next labor. Occupation (P=0.006), knowledge of epidural analgesia (P=0.017) and previous use (P<0.001) significantly influenced desire for epidural analgesia but only knowledge (OR 2.4 95% CI 1.4-4.3) and previous use (OR 5.3 95% CI 2.1-13.5) were of statistical significance on multivariate analysis. CONCLUSION: This study shows that the knowledge of labor epidural analgesia amongst Nigerian women is low. Despite limited availability, women who are aware of epidural analgesia and those who have received it in a previous labor were more likely to want it in their forthcoming labor. Some women may refuse its use despite their knowledge.

Correlation of cervical cytology and visual inspection with acetic acid in HIV-positive women.

The prevalence of squamous intraepithelial lesion is higher among human immunodeficiency virus (HIV)-positive women. These lesions when they occur in these patients are also more difficult to treat. A total of 205 consenting HIV-seropositive women were recruited. A cervical cytology (Pap smear) was taken, followed by visual inspection with freshly prepared 5% acetic acid and cervical biopsy taken from the squamocolumnar junction as the reference for diagnosis to avoid verification bias. The sensitivity of VIA was 76.0% (95% CI 52.0-91.0); specificity 83.0% (95% CI 77.0-88.0); positive predictive value 34.0% (95% CI 21.0-49.0). The sensitivity of cervical cytology (Pap smear) was 57.0% (95% CI 34.0-77.0), specificity of 95.0% (95% CI 90.0-97.0), and positive predictive value of 55.0% (95% CI 33.0-75.0). In HIV-seropositive women, the sensitivity of VIA is 76.0%, making it a useful screening test for preinvasive lesion of the cervix in low resource settings.

Serologic and virologic surveillance of avian influenza in Nigeria, 2006-7.

Since January 2006, H5N1 avian influenza has affected Nigeria's poultry population causing enormous loss of resources. The current circulating virus is a potential candidate for pandemic influenza which may severely affect the human and animal population worldwide especially in the resource-poor countries. In this study, we report on our field and laboratory surveillance efforts in Nigeria. A total of 1,821 tissue samples, 8,638 tracheal swabs, 7,976 cloacal swabs and 7,328 avian sera were analysed over a period of two years, with 312 positive results [corrected] We recovered 299 isolates of highly pathogenic avian influenza virus H5N1 mainly from the diagnostic samples of poultry kept in backyard, small scale and free range farms. This finding emphasised the role played by these farming systems in the dissemination of avian influenza in Nigeria and highlights the need for a continued surveillance in humans since human-animal interaction is a key feature in Africa. Furthermore, there is a need for the strengthening of border controls. Since October 2007, there has been no reported and confirmed outbreak of avian influenza in Nigeria.