BACKGROUND: In areas of endemic transmission, malaria in pregnancy is associated with severe maternal anaemia and low birthweight babies. The prevalence of infection is highest in primigravidae (PG), and hence control efforts are usually geared towards this high risk group. Using a sensitive measure of placental infection, we investigated the relationship between active-acute, active-chronic and past placental infection with maternal anaemia and low birthweight in women of all gravidities. METHODS: Between January 1996 and July 1997, 912 women delivering in Kilifi District Hospital, Kenya, were recruited. Haemoglobin and peripheral malaria slides were taken prior to delivery, placental biopsies and smears were taken at the time of delivery and birthweight and maternal height and weight were measured soon after birth. Information was obtained on socio-economic and educational status. The association between placental malaria, severe anaemia and low birthweight was investigated for women of different gravidities. FINDINGS: By placental histology, the prevalence of active or past malaria in all gravidities was high, ranging from 64% in PG to 30% in gravidities 5 and above. In gravidities 1-4, active malaria infection was associated with severe maternal anaemia, adjusted OR 2.21 (95% CI 1.36, 3.61). There was a significant interaction between chronic or past malaria and severe anaemia in their effects on birthweight, whereby the risk of low birthweight was very high in women with both chronic or past placental malaria and severe anaemia: OR 4.53 (1.19, 17.2) in PG; 13.5 (4.57, 40) in gravidities 2-4. INTERPRETATION: In this area of moderate malaria transmission, women of all parities have substantially increased risk of low birthweight and severe anaemia as a result of malaria infection in pregnancy. The risk of low birthweight is likely to be particularly high in areas with a high prevalence of severe anaemia.
BACKGROUND: In areas of endemic transmission, malaria in pregnancy is associated with severe maternal anaemia and low birthweight babies. The prevalence of infection is highest in primigravidae (PG), and hence control efforts are usually geared towards this high risk group. Using a sensitive measure of placental infection, we investigated the relationship between active-acute, active-chronic and past placental infection with maternal anaemia and low birthweight in women of all gravidities. METHODS: Between January 1996 and July 1997, 912 women delivering in Kilifi District Hospital, Kenya, were recruited. Haemoglobin and peripheral malaria slides were taken prior to delivery, placental biopsies and smears were taken at the time of delivery and birthweight and maternal height and weight were measured soon after birth. Information was obtained on socio-economic and educational status. The association between placental malaria, severe anaemia and low birthweight was investigated for women of different gravidities. FINDINGS: By placental histology, the prevalence of active or past malaria in all gravidities was high, ranging from 64% in PG to 30% in gravidities 5 and above. In gravidities 1-4, active malaria infection was associated with severe maternal anaemia, adjusted OR 2.21 (95% CI 1.36, 3.61). There was a significant interaction between chronic or past malaria and severe anaemia in their effects on birthweight, whereby the risk of low birthweight was very high in women with both chronic or past placental malaria and severe anaemia: OR 4.53 (1.19, 17.2) in PG; 13.5 (4.57, 40) in gravidities 2-4. INTERPRETATION: In this area of moderate malaria transmission, women of all parities have substantially increased risk of low birthweight and severe anaemia as a result of malaria infection in pregnancy. The risk of low birthweight is likely to be particularly high in areas with a high prevalence of severe anaemia.
Authors: Atis Muehlenbachs; Michal Fried; Rose McGready; Whitney E Harrington; Theonest K Mutabingwa; François Nosten; Patrick E Duffy Journal: J Infect Dis Date: 2010-10-07 Impact factor: 5.226
Authors: Falgunee K Parekh; Billie B Davison; Dionicia Gamboa; Jean Hernandez; Oralee H Branch Journal: Am J Trop Med Hyg Date: 2010-11 Impact factor: 2.345
Authors: Falgunee K Parekh; Jean N Hernandez; Donald J Krogstad; W Martin Casapia; Oralee H Branch Journal: Am J Trop Med Hyg Date: 2007-09 Impact factor: 2.345
Authors: Claudio R F Marinho; Rita Neres; Sabrina Epiphanio; Lígia A Gonçalves; Manuela Beirão Catarino; Carlos Penha-Gonçalves Journal: PLoS One Date: 2009-05-20 Impact factor: 3.240
Authors: Olugbenga A Mokuolu; Catherine O Falade; Adeola A Orogade; Henrietta U Okafor; Olanrewaju T Adedoyin; Tagbo A Oguonu; Hannah O Dada-Adegbola; O A Oguntayo; Samuel K Ernest; Davidson H Hamer; Michael V Callahan Journal: Infect Dis Obstet Gynecol Date: 2009-07-20
Authors: Brigitte Walther; David J C Miles; Sarah Crozier; Pauline Waight; Melba S Palmero; Olubukola Ojuola; Ebrima Touray; Marianne van der Sande; Hilton Whittle; Sarah Rowland-Jones; Katie L Flanagan Journal: Malar J Date: 2010-01-14 Impact factor: 2.979
Authors: David C Simpson; Edward Kabyemela; Atis Muehlenbachs; Yuko Ogata; Theonest K Mutabingwa; Patrick E Duffy; Michal Fried Journal: PLoS One Date: 2010-01-21 Impact factor: 3.240