Nafissa Bique Osman

Impact of a double dose of sulphadoxine–pyrimethamine to reduce prevalence of pregnancy malaria in southern Mozambique

Malarial infection during pregnancy increases the risks of severe sequelae for the pregnant woman and the risk of delivering a low birthweight baby. The aim of this intervention study was to reduce significantly the prevalence of malaria parasitaemia in adolescent parturients in Matola and Boane in Mozambique. The study was focused upon the most malaria‐vulnerable group, adolescent nulliparous and primiparous women. After completing the usual antenatal clinic and giving informed consent, 600 pregnant women were randomly chosen in a double blind manner to one of two regimens comparing the prevailing routine (placebo) for malaria prevention with a two dose regimen of sulphadoxine–pyrimethamine (SP). The first dose was given at enrolment with a second dose at the beginning of the third trimester. At delivery maternal and placental malaria parasitaemia as well as birthweight and gestational duration were analysed. At booking the prevalence of malaria parasitaemia was 35.3% in the placebo group and 30.6% in the SP group. At the second dose, the prevalence of malaria parasitaemia in the placebo group and SP group was 19.7% and 8.7%, respectively. This implies a relative risk (RR) of 2.24 with 95% CI (1.34, 3.75). The corresponding figures at delivery were 13.6% and 6.3% with an RR of 2.22 (1.07, 4.60) and in placenta 13.3% and 2.4% with an RR of 4.87 (1.58, 15.0). Newborns with malaria within 7 days were significantly more frequent in the placebo group, 6.4% and 0.7% respectively, with an RR of 6.55 (1.20, 35.7). Almost all (approximately 98%) of the women studied had Plasmodium falciparum, the remainder had P. malariae and P. ovale. The mean birthweight in the SP group was 3077 g and in the placebo group 2926 g. The estimated mean difference between the two groups was 151 g with 95% CI (51, 252). The mean placental weight in the placebo group was 596 and 645 g in the SP group, implying a difference of 49 g with a 95% CI (11, 88). The mean gestational duration was 6.1 days longer in the SP group, 95% CI (1.5, 10.6). In the placebo group there were two cases of urticaria and one case of nausea; in the SP group there was one case of vomiting. No newborn showed any sign of serious SP side‐effect. Two doses of SP were enough to significantly reduce the prevalence of peripheral and placental malaria parasitaemia among young nulliparous and primiparous pregnant women in Matola and Boane.

Clinico-Pathological Discrepancies in the Diagnosis of Causes of Maternal Death in Sub-Saharan Africa: Retrospective Analysis

Background Maternal mortality is a major public-health problem in developing countries. Extreme differences in maternal mortality rates between developed and developing countries indicate that most of these deaths are preventable. Most information on the causes of maternal death in these areas is based on clinical records and verbal autopsies. Clinical diagnostic errors may play a significant role in this problem and might also have major implications for the evaluation of current estimations of causes of maternal death. Methods and Findings A retrospective analysis of clinico-pathologic correlation was carried out, using necropsy as the gold standard for diagnosis. All maternal autopsies (n = 139) during the period from October 2002 to December 2004 at the Maputo Central Hospital, Mozambique were included and major diagnostic discrepancies were analyzed (i.e., those involving the cause of death). Major diagnostic errors were detected in 56 (40.3%) maternal deaths. A high rate of false negative diagnoses was observed for infectious diseases, which showed sensitivities under 50%: HIV/AIDS-related conditions (33.3%), pyogenic bronchopneumonia (35.3%), pyogenic meningitis (40.0%), and puerperal septicemia (50.0%). Eclampsia, was the main source of false positive diagnoses, showing a low predictive positive value (42.9%). Conclusions Clinico-pathological discrepancies may have a significant impact on maternal mortality in sub-Saharan Africa and question the validity of reports based on clinical data or verbal autopsies. Increasing clinical awareness of the impact of obstetric and nonobstetric infections with their inclusion in the differential diagnosis, together with a thorough evaluation of cases clinically thought to be eclampsia, could have a significant impact on the reduction of maternal mortality.

Perinatal outcome in an obstetric cohort of Mozambican women.

A prospective cohort of 908 consecutively enrolled pregnant women with biparietal diameter (DBP) compatible with gestational age equal to or below 21 weeks were followed up regularly at 2-4 weeks intervals. Normal antenatal care routine was applied. The newborns were followed until 7 days postpartum. The setting was two suburban antenatal clinics in Maputo and the delivery ward at the Maputo Central Hospital. The main outcome variables were low birth weight (LBW), preterm delivery, intrauterine fetal death, perinatal death and small for gestational age (SGA). For each of these variables the odds ratio for maternal risk factors was estimated with 95 per cent confidence interval and multiple logistic regression analysis was used. LBW occurred in 16.2 per cent and low maternal weight, low weight gain during pregnancy and not having a living child were risk factors. Prevalence of preterm birth was 15.4 per cent and low weight gain during pregnancy and malaria in the perinatal period were risk factors. Four per cent of mothers delivered stillborns and syphilis serology (positive VDRL test) was a risk factor. Perinatal death occurred in 4.7 per cent. These deaths were associated with being SGA, LBW or preterm at birth. Of the cohort women, 9.7 per cent delivered SGA newborns. It was concluded that maternal constitutional factors, particularly maternal weight gain, maternal height and maternal weight as well as syphilis and malaria during pregnancy, need to be given attention concerning the adverse outcomes addressed. The establishment of an obstetric cohort, followed prospectively, was possible in a low-income setting with limited numbers lost to follow-up at delivery.

A case control study of chorioamniotic infection and histological chorioamnionitis in stillbirth.

In order to elucidate the role and aetiology of chorioamnionitis in stillbirth a case referent study was carried out in 58 pregnant women with late foetal death (cases) and in 58 pregnant women at term with live foetus (referents) matched for age and parity in Maputo Mozambique. Samples from women, stillborns and liveborns, were collected for microbiological and histological assessment. Histological chorioamnionitis was diagnosed in 96% of the cases and in 67% of the referents (OR=13.5; 95% CI: 2.9–123.9). Escherichia coli was the species most frequently isolated in stillborns; in 14/16 (88%) cases it was isolated from intracardiac fluid. E. coli was associated with chorioamnionitis in 28% of the stillborns as compared to 5% of the referents (OR=6.9; 95% CI: 1.4–65.4). No group B streptococci were recovered from any placenta or newborn. Vasculitis was present in 12 (21%) cases and in 3 (5%) referents (OR=4.8; 95%, CI: 1.2–27.7). Histological chorioamnionitis was thus associated with stillbirth. E. coli was common in stillborns. The presence of vasculitis in one fifth of the stillborns indicated that the foetus was alive at the onset of infection.

Symphysis-fundal height growth chart of an obstetric cohort of 817 Mozambican women with ultrasound-dated singleton pregnancies

Our aim was to construct a new symphysis‐fundus height (SFH) growth chart, based on Mozambican women with ultrasound‐dated singleton pregnancy, who represent the largest obstetric cohort in a developing country followed for this purpose. Two antenatal clinics were chosen in the suburban area of Maputo City. A cohort of 904 consecutively recruited antenatal clients was followed until delivery. The growth of the SFH was measured every second to third week. Gestational age was determined by ultrasound at enrolment. Women with multiple pregnancy or with gestational age > 21 weeks at enrolment were excluded. The average number of antenatal SFH measurements per woman was 7.8 (SD 2.4). The drop out rate was 9.6%. Mean birthweight was 2909 g. Pre‐term deliveries occurred in 15% and low birthweight deliveries (< 2500 g) in 16%. Using proper longitudinal methods, we constructed an FH growth chart and compared it with various previously published SFH charts, which showed the Mozambican chart to be 0–3 cm below the others. Nulliparous women were 0.5 cm below multiparous women. We did not find any difference in the SFH growth charts between women with or without overt morbidity. Women with a body mass index (BMI) < 19 and women with a BMI > 27 had approximately 1 cm lower and 1 cm higher readings, respectively, than women with normal BMI. The Mozambican SFH growth chart is an example of an elaborated growth chart for a well‐defined population in alow‐income country. It constitutes the basis for further studies to predict the small‐for‐gestational age newborn from anthropometrical data obtained by use of appropriate technology.

Seasonal variations in maternal mortality in Maputo, Mozambique: the role of malaria

Objective  To evaluate the impact of malaria on maternal death through the analysis of the seasonal variations of crude and malaria‐specific maternal mortality rates.

Choice of antibiotics for infection prophylaxis in emergency cesarean sections in low-income countries: a cost-benefit study in Mozambique.

Background.  There is a need to assess the cost‐benefit of different models of antibiotic administration for the prevention of post cesarean infection, particularly in resource‐scarce settings.

Genital infections in the aetiology of late fetal death: an incident case-referent study.

Women with prelabour fetal death in the third trimester were recruited in order to study the association between intra-uterine death and maternal genital colonization of bacteria. Fifty-eight women with verified fetal death were compared with a group of 58 women matched for age, parity and gestational length (the first referent group) and with women delivering liveborn neonates (second referent group). Cultures from the vagina, the endocervix, the amniotic fluid, the placenta, the conjunctivae of the newborn and the secretion of gastric aspirate of the newborn were carried out. Blood was taken for haemoglobin, thick film (malaria) and syphilis and HIV serology. Cases were more affected by previous stillbirths than first referents (OR = 11.88). Preterm delivery was significantly more common in cases than in second referents (OR = 57.70). Cases had significantly more often < 3 ANC visits (OR = 2.81). Cases had a lower body mass index than first referents (OR = 2.38). Temperature > or = 37 degrees C was 12 times more frequent in cases than in first referents (OR = 21.20) and four times more frequent than in second referents (OR = 6.60). Average birth weight among stillborns was 1954 g and in liveborns 3223 g (P = 0.001). The corresponding prevalence of LBW was 78% in cases and 0% among second referents (P < 0.001). Histological chorioamnionitis was significantly prevalent in cases than in second referents (OR = 4.97). Syphilis was significantly more common in cases than in first (OR = 7.71) and in second referents (OR = 5.30).(ABSTRACT TRUNCATED AT 250 WORDS)

Intrauterine Infections and Their Association with Stillbirth and Preterm Birth in Maputo, Mozambique

Subclinical intrauterine infections during pregnancy in Mozambican women were studied in an attempt to elucidate their potential association with adverse pregnancy outcome, particularly stillbirth and preterm birth. A total of 39 stillbirths and 21 preterm live births were compared with 121 term live births. Extraplacental membranes and amniotic fluid were studied to ascertain the presence or absence of chorioamnionitis and of antibacterial activity in amniotic fluid. It was found that signs of maternal subclinical disease in extraplacental membranes in combination with an absence of antibacterial activity in amniotic fluid was overrepresented in stillbirths and preterm births in relation to term live births. A tentative conclusion is that a lack of antibacterial activity in amniotic fluid and established chorioamnionitis represent a vicious combination with strongly negative significance for the fetal outcome.

Maternal and Fetal Characteristics In An Obstetric Cohort In Mozambique

A sample of 908 Mozambican pregnant women with gestational age < or = 21 weeks (as measured by ultrasound) were followed fortnightly from their first antenatal clinic visit until the end of the perinatal period. All women attended two suburban/semirural antenatal clinics in Maputo. Only 9% were lost to follow-up. Pre-term delivery occurred in 15.4% of women and low birthweight (LBW) in 16.2%. Mean birthweight was 2.91 kg. Perinatal death occurred in 4.7%. This obstetric cohort provides valuable baseline data to be used as reference. With substantial efforts, the non-compliance with follow-up at birth could be kept at a low level.