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Naheda A, Aqeel S, Khan K, Khan W, Khan T. Immunohistopathological changes in the placenta of malaria-infected women in unstable transmission setting of Aligarh. Placenta 2022; 127:52-61. [PMID: 35970103 DOI: 10.1016/j.placenta.2022.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 07/16/2022] [Accepted: 07/24/2022] [Indexed: 10/15/2022]
Abstract
INTRODUCTION Pregnant women are more susceptible to malaria due to a combination of physiological and immunological changes. The infection may even affect the growth and survival of the foetus, which mainly occur when parasite enters the placenta. The sequestration of infected erythrocytes may trigger the host response, leading to placental inflammation and altered development, affecting the structure and nutrient transport of placenta. These factors collectively impair placental functions and affect foetal growth. METHODS Pregnant women with peripheral parasitaemia for P. falciparum and P. vivax (20 each) were included in the present study, along with 15 age-matched uninfected healthy pregnant women. Placentae were analysed for the presence of local parasitaemia along with pathological lesions caused due to the parasite. Immunohistochemical staining for CD20, CD45 and CD68 cells was performed for examining the specific leucocytes in the intervillous space of the placenta. RESULTS Of the 20 individuals with P. falciparum, only seven placentae showed parasitaemia, whereas individuals with P. vivax showed no placental infection. The pathological changes observed in the P. falciparum-infected placenta include syncytial knotting, excess fibrinoid deposition, syncytiotrophoblast necrosis, syncytial rupture, thickening of trophoblast basement membrane and increased collagen deposition. Immunohistochemical staining showed a significant increase in B cells (CD20), leucocytes (CD45) and monocytes and macrophages (CD68) in the P. falciparum-infected placenta (p < 0.0001). DISCUSSION The result implies that P. falciparum is responsible for pathological alterations in placenta, affecting the nutrient transport across placenta and foetal growth. The immune cells also migrate to the placenta and accumulate in the intervillous space to show humoral and cell-mediated immunity against the parasite.
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Affiliation(s)
- Ansari Naheda
- Section of Parasitology, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India.
| | - Sana Aqeel
- Section of Parasitology, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India
| | - Khadija Khan
- Section of Parasitology, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India
| | - Wajihullah Khan
- Section of Parasitology, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India.
| | - Tamkin Khan
- Department of Obstetrics & Gynaecology, Jawaharlal Nehru Medical College & Hospital, Aligarh Muslim University, Aligarh, 202002, India
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MOUHOUMED HAMDAMOHAMED, MEHMET NIMETCAN. Utilization pattern of antenatal care and determining factors among reproductive-age women in Borama, Somaliland. JOURNAL OF PREVENTIVE MEDICINE AND HYGIENE 2021; 62:E439-E446. [PMID: 34604585 PMCID: PMC8451356 DOI: 10.15167/2421-4248/jpmh2021.62.2.1882] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/07/2021] [Indexed: 11/16/2022]
Abstract
Background Antenatal care is essential care given during pregnancy, to diagnose and treat complications that could endanger both the lives of mother and child. The risk of dying from pregnancy-related issues is often associated with a lack of access to antenatal care services. This issue is a prominent matter in developing countries such as Somaliland which has one of the highest maternal mortality rates in the world. Objective The objective of this study is to determine the frequency and timing of antenatal care utilization and factors influencing it among reproductive-age women. Methods A population-based cross-sectional survey is conducted among 330 randomly selected mothers who gave birth in the past two years in Borama, Somaliland. Result Although a significant number of women utilized antenatal care in their pregnancy only 31.1% initiated the first visit within the first trimester and 48.3% received less than the recommended four visits. Fewer antenatal care visits are significantly associated with age (OR = 3.018; CI = 1.264-7.207), gravida (OR = 3.295; CI = 1.200-9.045), and gestation age (OR = 1.737; CI = 1.013-2.979). Early marriage (OR=0.495; CI = 0.252-0.973), and large family size (OR = 3.952; CI = 1.330-11.742) are associated with delay in the commencement of the first antenatal care visit. Conclusion Young women, women with multiple pregnancies, women married at a young age, and women with a large family size have a higher probability of delaying prenatal care and having fewer visits. Based on the findings, uplifting the socioeconomic status and literacy level of women through community-based education and developing strategies that would take the determining factors into account may contribute to improved and adequate utilization of antenatal care.
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Affiliation(s)
- HAMDA MOHAMED MOUHOUMED
- Correspondence: Hamda Mohamed Mouhoumed, Yildirim Beyazit University, Department of Public Health, Ayvalı Mah. 150 Sk. Etlik-Keçiören, Ankara, Turkey - E-mail:
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Ayanlade A, Nwayor IJ, Sergi C, Ayanlade OS, Di Carlo P, Jeje OD, Jegede MO. Early warning climate indices for malaria and meningitis in tropical ecological zones. Sci Rep 2020; 10:14303. [PMID: 32868821 PMCID: PMC7459128 DOI: 10.1038/s41598-020-71094-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 08/10/2020] [Indexed: 11/25/2022] Open
Abstract
This study aims at assessing the impacts of climate indices on the spatiotemporal distribution of malaria and meningitis in Nigeria. The primary focus of the research is to develop an Early Warning System (EWS) for assessing climate variability implications on malaria and meningitis spread in the study area. Both climate and health data were used in the study to determine the relationship between climate variability and the occurrence of malaria and meningitis. The assessment was based on variations in different ecological zones in Nigeria. Two specific sample locations were randomly selected in each ecological zone for the analysis. The climatic data used in this study are dekadal precipitation, minimum and maximum temperature between 2000 and 2018, monthly aerosol optical depth between 2000 and 2018. The results show that temperature is relatively high throughout the year because the country is located in a tropical region. The significant findings of this study are that rainfall has much influence on the occurrence of malaria, while temperature and aerosol have more impact on meningitis. We found the degree of relationship between precipitation and malaria, there is a correlation coefficient R2 ≥ 70.0 in Rainforest, Freshwater, and Mangrove ecological zones. The relationship between temperature and meningitis is accompanied by R2 ≥ 72.0 in both Sahel and Sudan, while aerosol and meningitis harbour R2 = 77.33 in the Sahel. The assessment of this initial data seems to support the finding that the occurrences of meningitis are higher in the northern region, especially the Sahel and Sudan. In contrast, malaria occurrence is higher in the southern part of the study area. In all, the multiple linear regression results revealed that rainfall was directly associated with malaria with β = 0.64, p = 0.001 but aerosol was directly associated with meningitis with β = 0.59, p < 0.001. The study concludes that variability in climatic elements such as low precipitation, high temperature, and aerosol may be the major drivers of meningitis occurrence.
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Affiliation(s)
- Ayansina Ayanlade
- Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria.
| | - Isioma J Nwayor
- Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria
| | | | - Oluwatoyin S Ayanlade
- African Institute for Science Policy and Innovation, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Paola Di Carlo
- PROMISE Department, University of Palermo, Palermo, Italy
| | - Olajumoke D Jeje
- Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Margaret O Jegede
- African Institute for Science Policy and Innovation, Obafemi Awolowo University, Ile-Ife, Nigeria
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Tuberculosis evolution and climate change: How much work is ahead? Acta Trop 2019; 190:157-158. [PMID: 30452890 DOI: 10.1016/j.actatropica.2018.11.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/15/2018] [Accepted: 11/15/2018] [Indexed: 01/29/2023]
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Sylvester B, Gasarasi DB, Aboud S, Tarimo D, Massawe S, Mpembeni R, Swedberg G. Prenatal exposure to Plasmodium falciparum increases frequency and shortens time from birth to first clinical malaria episodes during the first two years of life: prospective birth cohort study. Malar J 2016; 15:379. [PMID: 27448394 PMCID: PMC4957302 DOI: 10.1186/s12936-016-1417-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 07/04/2016] [Indexed: 11/23/2022] Open
Abstract
Background Prenatal exposure to Plasmodium falciparum affects development of protective immunity and susceptibility to subsequent natural challenges with similar parasite antigens. However, the nature of these effects has not been fully elucidated. The aim of this study was to determine the effect of prenatal exposure to P. falciparum on susceptibility to natural malaria infection, with a focus on median time from birth to first clinical malaria episode and frequency of clinical malaria episodes in the first 2 years of life. Methods A prospective birth cohort study was conducted in Rufiji district in Tanzania, between January 2013 and December 2015. Infants born to mothers with P. falciparum in the placenta at time of delivery were defined as exposed, and infants born to mothers without P. falciparum parasites in placenta were defined as unexposed. Placental infection was established by histological techniques. Out of 206 infants recruited, 41 were in utero exposed to P. falciparum and 165 infants were unexposed. All infants were monitored for onset of clinical malaria episodes in the first 2 years of life. The outcome measure was time from birth to first clinical malaria episode, defined by fever (≥37 °C) and microscopically determined parasitaemia. Median time to first clinical malaria episode between exposed and unexposed infants was assessed using Kaplan–Meier survival analysis and comparison was done by log rank. Association of clinical malaria episodes with prenatal exposure to P. falciparum was assessed by multivariate binary logistic regression. Comparative analysis of mean number of clinical malaria episodes between exposed and unexposed infants was done using independent sample t test. Results The effect of prenatal exposure to P. falciparum infection on clinical malaria episodes was statistically significant (Odds Ratio of 4.79, 95 % CI 2.21–10.38, p < 0.01) when compared to other confounding factors. Median time from birth to first clinical malaria episode for exposed and unexposed infants was 32 weeks (95 % CI 30.88–33.12) and 37 weeks (95 % CI 35.25–38.75), respectively, and the difference was statistically significant (p = 0.003). The mean number of clinical malaria episodes in exposed and unexposed infants was 0.51 and 0.30 episodes/infant, respectively, and the difference was statistically significant (p = 0.038). Conclusions Prenatal exposure to P. falciparum shortens time from birth to first clinical malaria episode and increases frequency of clinical malaria episodes in the first 2 years of life.
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Affiliation(s)
- Boniphace Sylvester
- Department of Parasitology and Medical Entomology, School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, P.O.BOX 65001, Dar es Salaam, Tanzania.
| | - Dinah B Gasarasi
- Department of Parasitology and Medical Entomology, School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, P.O.BOX 65001, Dar es Salaam, Tanzania
| | - Said Aboud
- Department of Microbiology and Immunology, School of Medicine, Muhimbili University of Health and Allied Sciences, P.O.BOX 65001, Dar es Salaam, Tanzania
| | - Donath Tarimo
- Department of Parasitology and Medical Entomology, School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, P.O.BOX 65001, Dar es Salaam, Tanzania
| | - Siriel Massawe
- Department of Obstetrics and Gynaecology, School of Medicine, Muhimbili University of Health and Allied Sciences, P.O.BOX 65001, Dar es Salaam, Tanzania
| | - Rose Mpembeni
- Department of Community Medicine, School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, P.O.BOX 65001, Dar es Salaam, Tanzania
| | - Gote Swedberg
- Department of Medical Biochemistry, Biomedical Centre, Uppsala University, Uppsala, Sweden
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Fitri LE, Jahja NE, Huwae IR, Nara MB, Berens-Riha N. Congenital malaria in newborns selected for low birth-weight, anemia, and other possible symptoms in Maumere, Indonesia. THE KOREAN JOURNAL OF PARASITOLOGY 2014; 52:639-44. [PMID: 25548415 PMCID: PMC4277026 DOI: 10.3347/kjp.2014.52.6.639] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 07/08/2014] [Accepted: 08/18/2014] [Indexed: 11/23/2022]
Abstract
Congenital malaria is assumed to be a risk factor for infant morbidity and mortality in endemic areas like Maumere, Indonesia. Infected infants are susceptible to its impact such as premature labor, low birth weight, anemia, and other unspecified symptoms. The aim of this study was to investigate the prevalence of congenital malaria and the influence of mother-infant paired parasite densities on the clinical outcome of the newborns at TC Hillers Hospital, Maumere. An analytical cross sectional study was carried out in newborns which showed criteria associated with congenital malaria. A thick and thin blood smear confirmed by nested PCR was performed in both mothers and infants. The association of congenital malaria with the newborn's health status was then assessed. From 112 mother-infant pairs included in this study, 92 were evaluated further. Thirty-nine infants (42.4%) were found to be infected and half of them were asymptomatic. Infected newborns had a 4.7 times higher risk in developing anemia compared to uninfected newborns (95% CI, 1.3-17.1). The hemoglobin level, erythrocyte amount, and hematocrit level were affected by the infants' parasite densities (P<0.05). Focusing on newborns at risk of congenital malaria, the prevalence is almost 3 times higher than in an unselected collective. Low birth weight, anemia, and pre-term birth were the most common features. Anemia seems to be significantly influenced by infant parasite densities but not by maternal parasitemia.
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Affiliation(s)
- Loeki Enggar Fitri
- Department of Parasitology, Faculty of Medicine, University of Brawijaya, Jalan Veteran Malang, East Java 65145, Indonesia
| | - Natalia Erica Jahja
- Department of Pediatrics, dr. Saiful Anwar Hospital/Faculty of Medicine, University of Brawijaya, Jalan J. A Suprapto no. 2 Malang, East Java 65141, Indonesia
| | - Irene Ratridewi Huwae
- Department of Pediatrics, dr. Saiful Anwar Hospital/Faculty of Medicine, University of Brawijaya, Jalan J. A Suprapto no. 2 Malang, East Java 65141, Indonesia
| | - Mario B Nara
- Department of Pediatrics, Dr. TC. Hillers Hospital, Jalan Wairklau Maumere, East Nusa Tenggara 86111, Indonesia
| | - Nicole Berens-Riha
- Department of Tropical Medicine and Infectious Diseases, Medical Center of the University of Munich (LMU), Leopoldstrasse 5, 80802 Munich, Germany
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Estimated risk of placental infection and low birthweight attributable to Plasmodium falciparum malaria in Africa in 2010: a modelling study. LANCET GLOBAL HEALTH 2014; 2:e460-7. [PMID: 25103519 DOI: 10.1016/s2214-109x(14)70256-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Plasmodium falciparum infection during pregnancy leads to adverse outcomes including low birthweight; however, contemporary estimates of the potential burden of malaria in pregnancy in Africa (in the absence of interventions) are poor. We aimed to estimate the need to protect pregnant women from malaria across Africa. METHODS Using a mathematical model applied to estimates of the geographical distribution of P falciparum across Africa in 2010, we estimated the number of pregnant women who would have been exposed to infection that year in the absence of pregnancy-specific intervention. We then used estimates of the parity-dependent acquisition of immunity to placental infection and associated risk of low birthweight to estimate the number of women who would have been affected. FINDINGS We estimate that, without pregnancy-specific protection, 12·4 million pregnant women (44·9% of all 27·6 million livebirths in malaria endemic areas in Africa in 2010) would have been exposed to infection, with 11·4 million having placental infection (41·2% of all livebirths). This infection leads to an estimated 900,000 (95% credible interval [CrI] 530,000-1,240,000) low birthweight deliveries per year. Around the end of the first trimester, when the placenta becomes susceptible to infection, is a key period during which we estimate that 65·2% (95% CrI 60·9-70·0) of placental infections first occur. INTERPRETATION Our calculations are the only contemporary estimates of the geographical distribution of placental infection and associated low birthweight. The risk of placental infection across Africa in unprotected women is high. Prevention of malaria before conception or very early in pregnancy is predicted to greatly reduce incidence of low birthweight, especially in primigravidae. The underlying lifetime risk of low birthweight changes slowly with decreasing transmission, drawing attention to the need to maintain protection as transmission falls. FUNDING Malaria in Pregnancy Consortium and the Bill & Melinda Gates Foundation.
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Laar AK, Grant FE, Addo Y, Soyiri I, Nkansah B, Abugri J, Laar AS, Ampofo WK, Tuakli JM, Quakyi IA. Predictors of fetal anemia and cord blood malaria parasitemia among newborns of HIV-positive mothers. BMC Res Notes 2013; 6:350. [PMID: 24007344 PMCID: PMC3844504 DOI: 10.1186/1756-0500-6-350] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 08/30/2013] [Indexed: 12/02/2022] Open
Abstract
Background Malaria and HIV infections during pregnancy can individually or jointly unleash or confound pregnancy outcomes. Two of the probable outcomes are fetal anemia and cord blood malaria parasitemia. We determined clinical and demographic factors associated with fetal anemia and cord blood malaria parasitemia in newborns of HIV-positive women from two districts in Ghana. Results We enrolled 1,154 antenatal attendees (443 HIV-positive and 711 HIV-negative) of which 66% were prospectively followed up at delivery. Maternal malaria parasitemia, and anemia rates among HIV+ participants at enrolment were 20.3% and 78.7% respectively, and 12.8% and 51.6% among HIV- participants. Multivariate linear and logistic regression models were used to study associations. Prevalence of fetal anemia (cord hemoglobin level < 12.5 g/dL) and cord parasitemia (presence of P. falciparum in cord blood at delivery) were 57.3% and 24.4% respectively. Factors found to be associated with fetal anemia were maternal malaria parasitemia and maternal anemia. Infant cord hemoglobin status at delivery was positively and significantly associated with maternal hemoglobin and gestational age whilst female gender of infant was negatively associated with cord hemoglobin status. Maternal malaria parasitemia status at recruitment and female gender of infant were positively associated with infant cord malaria parasitemia status. Conclusions Our data show that newborns of women infected with HIV and/or malaria are at increased risk of anemia and also cord blood malaria parasitemia. Prevention of malaria infection during pregnancy may reduce the incidence of both adverse perinatal outcomes.
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Affiliation(s)
- Amos K Laar
- Department of Population, Family, & Reproductive Health, School of Public Health, College of Health Sciences, University of Ghana, Box LG 13, Legon, Accra, Ghana.
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Abstract
Pregnant women have a higher risk of malaria compared to non-pregnant women. This review provides an update on knowledge acquired since 2000 on P. falciparum and P.vivax infections in pregnancy. Maternal risk factors for malaria in pregnancy (MiP) include low maternal age, low parity, and low gestational age. The main effects of MIP include maternal anaemia, low birth weight (LBW), preterm delivery and increased infant and maternal mortality. P. falciparum infected erythrocytes sequester in the placenta by expressing surface antigens, mainly variant surface antigen (VAR2CSA), that bind to specific receptors, mainly chondroitin sulphate A. In stable transmission settings, the higher malaria risk in primigravidae can be explained by the non-recognition of these surface antigens by the immune system. Recently, placental sequestration has been described also for P.vivax infections. The mechanism of preterm delivery and intrauterine growth retardation is not completely understood, but fever (preterm delivery), anaemia, and high cytokines levels have been implicated. Clinical suspicion of MiP should be confirmed by parasitological diagnosis. The sensitivity of microscopy, with placenta histology as the gold standard, is 60% and 45% for peripheral and placental falciparum infections in African women, respectively. Compared to microscopy, RDTs have a lower sensitivity though when the quality of microscopy is low RDTs may be more reliable. Insecticide treated nets (ITN) and intermittent preventive treatment in pregnancy (IPTp) are recommended for the prevention of MiP in stable transmission settings. ITNs have been shown to reduce malaria infection and adverse pregnancy outcomes by 28–47%. Although resistance is a concern, SP has been shown to be equivalent to MQ and AQ for IPTp. For the treatment of uncomplicated malaria during the first trimester, quinine plus clindamycin for 7 days is the first line treatment and artesunate plus clindamycin for 7 days is indicated if this treatment fails; in the 2nd and 3rd trimester first line treatment is an artemisinin-based combination therapy (ACT) known to be effective in the region or artesunate and clindamycin for 7 days or quinine and clindamycin. For severe malaria, in the second and third trimester parenteral artesunate is preferred over quinine. In the first trimester, both artesunate and quinine (parenteral) may be considered as options. Nevertheless, treatment should not be delayed and should be started immediately with the most readily available drug.
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Guin G, Shaw K, Khare S. Placental malaria prevalence of infestation amongst febrile pregnant women in central India: maternal and perinatal outcome. J Obstet Gynaecol India 2012; 62:25-31. [PMID: 23372285 PMCID: PMC3366571 DOI: 10.1007/s13224-012-0153-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2010] [Accepted: 02/11/2011] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVE To determine the prevalence and impact of placental malaria on maternal and fetal outcome. DESIGN Cross sectional observational. SETTING The Department of Obstetrics of Government NSCB Medical College Hospital, Jabalpur (Madhya Pradesh). POPULATION Five hundred parturient women with fever or history of fever during the present pregnancy. METHOD(S) Subjects were tested for peripheral and placental malaria by thick and thin smear examination. Maternal and perinatal outcome correlated with malaria results. RESULTS(S) The mean age of the studied subjects was 24.5 ± 2.6 years, 60.6 % were primigravida, 87.2 % had unsatisfactory antenatal care. 89.2 % were not using effective malaria prevention measures. Peripheral smear positivity for malaria was detected in 1.8 % subjects and placental malaria positivity in 2.2 % subjects. The mean Hb was lower in malaric subjects (χ(2) = 14.47, p < 0.05). Maternal mortality and prematurity was significantly higher in malaria +ve subjects (p < 0.001). The mean birth weight in malaria +ve subjects was significantly less (p < 0.001). Poor 5 min APGAR (p < 0.0001) and perinatal mortality (p < 0.05) was significantly more common in malaria +ve subjects. CONCLUSION(S) Malaria, particularly placental infestation with malarial parasites significantly increases maternal and perinatal morbidity and mortality.
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Affiliation(s)
- Gita Guin
- Department of Obstetrics & Gynaecology, Government N.S.C.B. Medical College and Hospital, 436, Kamla Nehru Nagar, Garha Road, Jabalpur, 482 002 Madhya Pradesh India
| | - Kaveri Shaw
- Department of Obstetrics & Gynaecology, Government N.S.C.B. Medical College and Hospital, 436, Kamla Nehru Nagar, Garha Road, Jabalpur, 482 002 Madhya Pradesh India
| | - Shashi Khare
- Department of Obstetrics & Gynaecology, Government N.S.C.B. Medical College and Hospital, 436, Kamla Nehru Nagar, Garha Road, Jabalpur, 482 002 Madhya Pradesh India
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Walther B, Miles DJC, Crozier S, Waight P, Palmero MS, Ojuola O, Touray E, van der Sande M, Whittle H, Rowland-Jones S, Flanagan KL. Placental malaria is associated with reduced early life weight development of affected children independent of low birth weight. Malar J 2010; 9:16. [PMID: 20074331 PMCID: PMC2841609 DOI: 10.1186/1475-2875-9-16] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Accepted: 01/14/2010] [Indexed: 11/10/2022] Open
Abstract
Background Infection with Plasmodium falciparum during pregnancy contributes substantially to the disease burden in both mothers and offspring. Placental malaria may lead to intrauterine growth restriction or preterm delivery resulting in low birth weight (LBW), which, in general, is associated with increased infant morbidity and mortality. However, little is known about the possible direct impact of the specific disease processes occurring in PM on longer term outcomes such as subsequent retarded growth development independent of LBW. Methods In an existing West-African cohort, 783 healthy infants with a birth weight of at least 2,000 g were followed up during their first year of life. The aim of the study was to investigate if Plasmodium falciparum infection of the placenta, assessed by placental histology, has an impact on several anthropometric parameters, measured at birth and after three, six and 12 months using generalized estimating equations models adjusting for moderate low birth weight. Results Independent of LBW, first to third born infants who were exposed to either past, chronic or acute placental malaria during pregnancy had significantly lower weight-for-age (-0.43, 95% CI: -0.80;-0.07), weight-for-length (-0.47, 95% CI: -0.84; -0.10) and BMI-for-age z-scores (-0.57, 95% CI: -0.84; -0.10) compared to infants born to mothers who were not diagnosed with placental malaria (p = 0.019, 0.013, and 0.012, respectively). Interestingly, the longitudinal data on histology-based diagnosis of PM also document a sharp decline of PM prevalence in the Sukuta cohort from 16.5% in 2002 to 5.4% in 2004. Conclusions It was demonstrated that PM has a negative impact on the infant's subsequent weight development that is independent of LBW, suggesting that the longer term effects of PM have been underestimated, even in areas where malaria transmission is declining.
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Affiliation(s)
- Brigitte Walther
- MRC Laboratories, Atlantic Boulevard, Fajara, PO Box 273 Banjul, The Gambia.
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Use of intermittent preventive treatment for malaria by pregnant women in Buea, Cameroon. Acta Trop 2009; 112:54-8. [PMID: 19539589 DOI: 10.1016/j.actatropica.2009.06.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 06/08/2009] [Accepted: 06/10/2009] [Indexed: 11/20/2022]
Abstract
We identified individual factors associated with IPT use, by comparing characteristics of pregnant women who use IPT to those who do not. A cross-sectional study was conducted in antenatal clinics in Buea, Cameroon, from December 2006 to December 2007. Information on factors: age, parity, gravidity, gestational age, level of education, use of insecticide treated nets (ITN), socioeconomic status and IPT use was collected through interview and filled in a questionnaire. Data was entered using EPIDATA version 3 and analysis done using STATA version 8.2. A total of 527 pregnant women were interviewed with a mean (+/-SD) age of 26.45+/-5.37 years. 69.71% of the pregnant women used at least two doses of IPT. Logistic regression revealed women with higher educational status were more likely to use IPT compared to those with lower educational status (OR=3.14, 95% CI=1.20-8.25, p=0.02). Meanwhile, multigravid women tend to use IPT less than their primigravid counterparts (OR=0.47, 95% CI=0.26-0.84, p=0.01). There was no evidence that maternal age, parity, marital status, gestational age, use of ITN and socioeconomic status were each associated to IPT use. In antenatal clinics in Buea, South Western Cameroon, educational status and gravidity are the key determinants of IPT use.
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Anchang-Kimbi JK, Achidi EA, Nkegoum B, Sverremark-Ekström E, Troye-Blomberg M. Diagnostic comparison of malaria infection in peripheral blood, placental blood and placental biopsies in Cameroonian parturient women. Malar J 2009; 8:126. [PMID: 19505312 PMCID: PMC2702348 DOI: 10.1186/1475-2875-8-126] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Accepted: 06/08/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In sub-Saharan Africa, Plasmodium falciparum malaria in pregnancy presents an enormous diagnostic challenge. The epidemiological and clinical relevance of the different types of malaria diagnosis as well as risk factors associated with malaria infection at delivery were investigated. METHOD In a cross-sectional survey, 306 women reporting for delivery in the Mutenegene maternity clinic, Fako division, South West province, Cameroon were screened for P. falciparum in peripheral blood, placental blood and placental tissue sections by microscopy. Information relating to the use of intermittent preventive treatment in pregnancy with sulphadoxine/pyrimethamine, history of fever attack, infant birth weights and maternal anaemia were recorded. RESULTS Among these women, P. falciparum infection was detected in 5.6%, 25.5% and 60.5% of the cases in peripheral blood, placental blood and placental histological sections respectively. Placental histology was more sensitive (97.4%) than placental blood film (41.5%) and peripheral blood (8.0%) microscopy. In multivariate analysis, age (< or = 20 years old) (OR = 4.61, 95% CI = 1.47 - 14.70), history of fever attack (OR = 2.98, 95% CI = 1.58 - 5.73) were significant risk factors associated with microscopically detected parasitaemia. The use of > or = 2 SP doses (OR = 0.18, 95% CI = 0.06 - 0.52) was associated with a significant reduction in the prevalence of microscopic parasitaemia at delivery. Age (>20 years) (OR = 0.34, 95% CI = 0.15 - 0.75) was the only significant risk factor associated with parasitaemia diagnosed by histology only in univariate analysis. Microscopic parasitaemia (OR = 2.74, 95% CI = 1.33-5.62) was a significant risk factor for maternal anaemia at delivery, but neither infection detected by histology only, nor past infection were associated with increased risk of anaemia. CONCLUSION Placenta histological examination was the most sensitive indicator of malaria infection at delivery. Microscopically detected parasitaemia was associated with increased risk of maternal anaemia at delivery, but not low-grade parasitaemia detected by placental histology only.
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Falade CO, Yusuf BO, Fadero FF, Mokuolu OA, Hamer DH, Salako LA. Intermittent preventive treatment with sulphadoxine-pyrimethamine is effective in preventing maternal and placental malaria in Ibadan, south-western Nigeria. Malar J 2007; 6:88. [PMID: 17617910 PMCID: PMC1941736 DOI: 10.1186/1475-2875-6-88] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Accepted: 07/06/2007] [Indexed: 05/16/2023] Open
Abstract
BACKGROUND Intermittent preventive treatment with sulphadoxine-pyrimethamine (IPT-SP) is currently the recommended regimen for prevention of malaria in pregnancy in endemic areas. This study sets out to evaluate the effectiveness of IPT-SP in the prevention of maternal and placental malaria in parturient mothers in Ibadan, Nigeria, where the risk of malaria is present all year round. METHOD During a larger study evaluating the epidemiology of congenital malaria, the effect of malaria prophylaxis was examined in 983 parturient mothers. Five hundred and ninety eight mothers (60.8%) received IPT-SP, 214 (21.8%) received pyrimethamine (PYR) and 171 (17.4%) did not take any chemoprophylactic agent (NC). RESULTS The prevalence of maternal parasitaemia in the IPT-SP, PYR and NC groups was 10.4%, 15.9% and 17% respectively (p = 0.021). The prevalence of placental parasitaemia was 10.5% in the IPT-SP, 16.8% PYR and 17% NC groups, respectively (p = 0.015). The prevalence of maternal anaemia (haematocrit <30%) was 5.7% vs. 8.9% vs. 13.4% among the IPT-SP, PYR and NC groups respectively (p < 0.0001) while that of pre-term delivery (GA <37 weeks) was 10.5%, 19.2% and 25.3% among IPT-SP, PYR and NC groups respectively (p < 0.0001). Babies born to mothers in the IPT-SP, PYR and NC groups had mean birth weights of 3204 +/- 487.16, 3075 +/- 513.24 and 3074 +/- 505.92 respectively (rho < 0.0001). There was a trend towards a lower proportion of low birth weight babies in the IPT-SP group (p = 0.095). CONCLUSION IPT-SP is effective in preventing maternal and placental malaria as well as improving pregnancy outcomes among parturient women in Ibadan, Nigeria. The implementation of the recently adopted IPT-SP strategy should be pursued with vigour as it holds great promise for reducing the burden of malaria in pregnancy in Nigeria.
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Affiliation(s)
- Catherine O Falade
- Department of Clinical Pharmacology, University College Hospital, Ibadan, Tel. +234-803-326-4593, Nigeria
- Department of Pharmacology and Therapeutics, University of Ibadan, Ibadan, Nigeria
| | - Bidemi O Yusuf
- Department of, Epidemiology Medical Statistics and Environmental Health, University of Ibadan, Ibadan, Nigeria
| | - Francis F Fadero
- Department of Pediatrics, Ladoke Akintola University of Technology, Oshogbo, Nigeria
| | | | - Davidson H Hamer
- Center for International Health and Development, Boston University School of Public Health, Boston, MA, USA
- Section of Infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Lateef A Salako
- Department of Pharmacology and Therapeutics, University of Ibadan, Ibadan, Nigeria
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15
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Mockenhaupt FP, Bedu-Addo G, von Gaertner C, Boyé R, Fricke K, Hannibal I, Karakaya F, Schaller M, Ulmen U, Acquah PA, Dietz E, Eggelte TA, Bienzle U. Detection and clinical manifestation of placental malaria in southern Ghana. Malar J 2006; 5:119. [PMID: 17166266 PMCID: PMC1716171 DOI: 10.1186/1475-2875-5-119] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2006] [Accepted: 12/13/2006] [Indexed: 12/03/2022] Open
Abstract
Background Plasmodium falciparum can be detected by microscopy, histidine-rich-protein-2 (HRP2) capture test or PCR but the respective clinical relevance of the thereby diagnosed infections in pregnant women is not well established. Methods In a cross-sectional, year-round study among 839 delivering women in Agogo, Ghana, P. falciparum was screened for in both, peripheral and placental blood samples, and associations with maternal anaemia, low birth weight (LBW) and preterm delivery (PD) were analysed. Results In peripheral blood, P. falciparum was observed in 19%, 34%, and 53% by microscopy, HRP2 test, and PCR, respectively. For placental samples, these figures were 35%, 41%, and 59%. Irrespective of diagnostic tool, P. falciparum infection increased the risk of anaemia. Positive peripheral blood results of microscopy and PCR were not associated with LBW or PD. In contrast, the HRP2 test performed well in identifying women at increased risk of poor pregnancy outcome, particularly in case of a negative peripheral blood film. Adjusting for age, parity, and antenatal visits, placental HRP2 was the only marker of infection associated with LBW (adjusted odds ratio (aOR), 1.5 (95%CI, 1.0–2.2)) and, at borderline statistical significance, PD (aOR, 1.4 (1.0–2.1)) in addition to anaemia (aOR, 2.3 (1.7–3.2)). Likewise, HRP2 in peripheral blood of seemingly aparasitaemic women was associated with PD (aOR, 1.7 (1.0–2.7)) and anaemia (aOR, 2.1 (1.4–3.2)). Conclusion Peripheral blood film microscopy not only underestimates placental malaria. In this highly endemic setting, it also fails to identify malaria as a cause of foetal impairment. Sub-microscopic infections detected by a HRP2 test in seemingly aparasitaemic women increase the risks of anaemia and PD. These findings indicate that the burden of malaria in pregnancy may be even larger than thought and accentuate the need for effective anti-malarial interventions in pregnancy.
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Affiliation(s)
- Frank P Mockenhaupt
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
| | - George Bedu-Addo
- Dept. of Medicine, Komfo Anoyke Teaching Hospital, School of Medical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | - Renate Boyé
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
| | - Katrin Fricke
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
| | - Iris Hannibal
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
| | - Filiz Karakaya
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
| | - Marieke Schaller
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
| | - Ulrike Ulmen
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
| | | | - Ekkehart Dietz
- Div. of International Health, Institute of Social Medicine, Epidemiology and Health Economy, Charité – University Medicine, Berlin, Germany
| | - Teunis A Eggelte
- Division of Infectious Diseases, Tropical Medicine and AIDS, Academic Medical Centre, Amsterdam, The Netherlands
| | - Ulrich Bienzle
- Institute of Tropical Medicine and International Health, Charité – University Medicine, Berlin, Germany
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