scholarly journals Trends of malaria infection in pregnancy in Ghana over the past two decades: a review

2022 ◽  
Vol 21 (1) ◽  
Author(s):  
Joseph Osarfo ◽  
Gifty Dufie Ampofo ◽  
Harry Tagbor
Keyword(s):  
Malaria Transmission ◽  
Malaria Infection ◽  
Low Birthweight ◽  
Parasite Prevalence ◽  
Forest Zone ◽  
The Past ◽  
Apparent Reduction ◽  
The Impact ◽  
Submicroscopic Parasitaemia ◽  
In Pregnancy

Abstract Background There has been a global decline in malaria transmission over the past decade. However, not much is known of the impact of this observation on the burden of malaria infection in pregnancy in endemic regions including Ghana. A narrative review was undertaken to help describe trends in malaria infection in pregnancy in Ghana. Among others, such information is important in showing any progress made in malaria in pregnancy control. Methods To describe trends in pregnancy-associated malaria infection in Ghana, a search and review of literature reporting data on the prevalence of asymptomatic Plasmodium falciparum infection in pregnancy was conducted. Results Thirty-six (36) studies, conducted over 1994–2019, were included in the review. In the northern savannah zone with largely seasonal malaria transmission, prevalence appeared to reduce from about 50–60% in 1994–2010 to 13–26% by 2019. In the middle transitional/forest zone, where transmission is perennial with peaks in the rainy season, prevalence apparently reduced from 60% in the late 1990 s to about 5–20% by 2018. In the coastal savannah area, there was apparent reduction from 28 to 35% in 2003–2010 to 5–11% by 2018–2019. The burden of malaria infection in pregnancy continues to be highest among teenagers and younger-aged pregnant women and paucigravidae. Conclusions There appears to be a decline in asymptomatic parasite prevalence in pregnancy in Ghana though this has not been uniform across the different transmission zones. The greatest declines were noticeably in urban settings. Submicroscopic parasitaemia remains a challenge for control efforts. Further studies are needed to evaluate the impact of the reduced parasite prevalence on maternal anaemia and low birthweight and to assess the local burden of submicroscopic parasitaemia in relation to pregnancy outcomes.

scholarly journals The Impact of 3 Years of Targeted Indoor Residual Spraying With Pirimiphos-Methyl on Malaria Parasite Prevalence in a High-Transmission Area of Northern Zambia

2019 ◽  
Vol 188 (12) ◽  
pp. 2120-2130 ◽  
Author(s):  
Marisa A Hast ◽  
Mike Chaponda ◽  
Mbanga Muleba ◽  
Jean-Bertin Kabuya ◽  
James Lupiya ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Malaria Control ◽  
Malaria Parasite ◽  
Control Measure ◽  
Indoor Residual Spraying ◽  
Parasite Prevalence ◽  
Organophosphate Insecticide ◽  
Malaria Burden ◽  
Pirimiphos Methyl ◽  
The Impact

Abstract Malaria transmission in northern Zambia has increased in the past decade, despite malaria control activities. Evidence-based intervention strategies are needed to effectively reduce malaria transmission. Zambia’s National Malaria Control Centre conducted targeted indoor residual spraying (IRS) in Nchelenge District, Luapula Province, from 2014 to 2016 using the organophosphate insecticide pirimiphos-methyl. An evaluation of the IRS campaign was conducted by the Southern Africa International Centers of Excellence for Malaria Research using actively detected malaria cases in bimonthly household surveys carried out from April 2012 to July 2017. Changes in malaria parasite prevalence after IRS were assessed by season using Poisson regression models with robust standard errors, controlling for clustering of participants in households and demographic, geographical, and climatological covariates. In targeted areas, parasite prevalence declined approximately 25% during the rainy season following IRS with pirimiphos-methyl but did not decline during the dry season or in the overall study area. Within targeted areas, parasite prevalence declined in unsprayed households, suggesting both direct and indirect effects of IRS. The moderate decrease in parasite prevalence within sprayed areas indicates that IRS with pirimiphos-methyl is an effective malaria control measure, but a more comprehensive package of interventions is needed to effectively reduce the malaria burden in this setting.

438: The impact of change in pregnancy body mass index on preterm birth and low birthweight

2013 ◽  
Vol 208 (1) ◽  
pp. S191
Author(s):  
Morgan Swank ◽  
Aaron Caughey ◽  
Christine Farinelli ◽  
Elliott Main ◽  
Kathryn Melsop ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Preterm Birth ◽  
Body Mass ◽  
Low Birthweight ◽  
The Impact ◽  
In Pregnancy

scholarly journals PO 8590 COMPARATIVE ANALYSIS OF IGG RESPONSES TO RECOMBINANT Qβ PHAGE DISPLAYED MSP3 AND UBO5 IN DUAL HIV/MALARIA-CO-INFECTED ADULTS

2019 ◽  
Vol 4 (Suppl 3) ◽  
pp. A59.2-A59
Author(s):  
Godwin Nchinda ◽  
Abel Lissom ◽  
Herve Ouambo ◽  
Malachy I Okeke ◽  
Thibeau F Tchouangueu ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Malaria Infection ◽  
Study Participant ◽  
Transmission Intensity ◽  
Igg Subclass ◽  
Double Negative ◽  
Igg Antibody ◽  
Low Transmission ◽  
Malaria Transmission Intensity ◽  
The Impact

BackgroundImmunoglobulin G (IgG)-specific responses against Plasmodium falciparum merozoite antigens such as the merozoite surface protein 3 (MSP3) and UBO5 are known to play critical roles in parasitaemia control and protection from symptomatic illness. However, when there is intense perennial malaria transmission coupled with concurrent infection with the human immunodeficiency virus type 1 (HIV), knowledge of IgG antibody response profiles is limited.In this study we assessed the impact of dual HIV/malaria infections on IgG subclass responses to MSP3 (QβMSP3) and UBO5 (QβUB05) in individuals living in two areas of Cameroon differing in malaria transmission intensity.MethodsIgG and IgG subclass responses specific to either MSP3 or UBO5 were determined in plasma from study participant by ELISA. To improve reactivity with their respective antibodies the antigens were displayed upon the surface of the RNA coliphage Qβ.ResultsWe observed differences in antigen-specific IgG and IgG subclass responses which were dependent upon the antigen type, malaria transmission intensity, HIV infection, malaria infection and dual HIV/malaria infections. Individuals living in areas with high malaria transmission, had irrespective of HIV or malaria status significantly higher IgG responses to both antigens (p=0.0001 for QβMSP3, p=0.0001 for QβUB05) than their counterpart from areas with low transmission. When dual HIV/malaria infection is considered, significantly higher QβMSP3 specific IgG1 (p=0.0001) and IgG3 (p=0.04) responses in double-negative individuals was associated with protection against malaria in areas with low transmission. Superior QβUBO5 specific IgG1 responses (p=0.0001) in double-negative individuals were associated with protection in areas with high transmission in contrast to significantly higher IgG3 responses to QβUBO5 (p=0.0001) which were more relevant to protection in areas with low malaria transmission in the same population.ConclusionThus, understanding immune responses to QβUBO5 and QβMSP3 could facilitate the development of immunotherapeutic strategies suitable for areas differing in malaria transmission intensity.

scholarly journals The Impact of Malaria in Pregnancy on Infant Susceptibility to Malaria Infection

2018 ◽  
Vol 50 (2) ◽  
Author(s):  
Ratni Indrawanti ◽  
Mahardika Wijayanti ◽  
Mochamad Hakimi ◽  
Mohammad Juffrie ◽  
Enny Kenangalem ◽  
...  
Keyword(s):  
Malaria Infection ◽  
Malaria In Pregnancy ◽  
The Impact ◽  
In Pregnancy

scholarly journals A quasi-experimental study estimating the impact of long-lasting insecticidal nets with and without piperonyl butoxide on pregnancy outcomes

2022 ◽  
Vol 21 (1) ◽  
Author(s):  
Michelle E. Roh ◽  
Brenda Oundo ◽  
Grant Dorsey ◽  
Stephen Shiboski ◽  
Roly Gosling ◽  
...  
Keyword(s):  
Pregnancy Outcomes ◽  
Low Birthweight ◽  
Pyrethroid Resistance ◽  
Controlled Trial ◽  
Piperonyl Butoxide ◽  
Difference In Differences ◽  
Quasi Experimental ◽  
The Impact ◽  
Long Lasting Insecticidal Nets ◽  
In Pregnancy

Abstract Background Long-lasting insecticidal nets (LLINs) are the main vector control tool for pregnant women, but their efficacy may be compromised, in part, due to pyrethroid resistance. In 2017, the Ugandan Ministry of Health embedded a cluster randomized controlled trial into the national LLIN campaign, where a random subset of health subdistricts (HSDs) received LLINs treated with piperonyl butoxide (PBO), a chemical synergist known to partially restore pyrethroid sensitivity. Using data from a small, non-randomly selected subset of HSDs, this secondary analysis used quasi-experimental methods to quantify the overall impact of the LLIN campaign on pregnancy outcomes. In an exploratory analysis, differences between PBO and conventional (non-PBO) LLINs on pregnancy outcomes were assessed. Methods Birth registry data (n = 39,085) were retrospectively collected from 21 health facilities across 12 HSDs, 29 months before and 9 months after the LLIN campaign (from 2015 to 2018). Of the 12 HSDs, six received conventional LLINs, five received PBO LLINs, and one received a mix of conventional and PBO LLINs. Interrupted time-series analyses (ITSAs) were used to estimate changes in monthly incidence of stillbirth and low birthweight (LBW; <2500 g) before-and-after the campaign. Poisson regression with robust standard errors modeled campaign effects, adjusting for health facility-level differences, seasonal variation, and time-varying maternal characteristics. Comparisons between PBO and conventional LLINs were estimated using difference-in-differences estimators. Results ITSAs estimated the campaign was associated with a 26% [95% CI: 7–41] reduction in stillbirth incidence (incidence rate ratio (IRR) = 0.74 [0.59–0.93]) and a 15% [-7, 33] reduction in LBW incidence (IRR=0.85 [0.67–1.07]) over a 9-month period. The effect on stillbirth incidence was greatest for women delivering 7–9 months after the campaign (IRR=0.60 [0.41–0.87]) for whom the LLINs would have covered most of their pregnancy. The IRRs estimated from difference-in-differences analyses comparing PBO to conventional LLINs was 0.78 [95% CI: 0.52, 1.16] for stillbirth incidence and 1.15 [95% CI: 0.87, 1.52] for LBW incidence. Conclusions In this region of Uganda, where pyrethroid resistance is high, this study found that a mass LLIN campaign was associated with reduced stillbirth incidence. Effects of the campaign were greatest for women who would have received LLINs early in pregnancy, suggesting malaria protection early in pregnancy can have important benefits that are not necessarily realized through antenatal malaria services. Results from the exploratory analyses comparing PBO and conventional LLINs on pregnancy outcomes were inconclusive, largely due to the wide confidence intervals that crossed the null. Thus, future studies with larger sample sizes are needed.

scholarly journals Plasmodium falciparum malaria during pregnancy: the impact of parasitaemia and anaemia on birthweight

2021 ◽  
Author(s):  
Dawood Ackom Abass ◽  
Abdul-Hakim Mutala ◽  
Christian Kwasi Owusu ◽  
Bernard Walter Lartekwei Lawson ◽  
Kingsley Badu
Keyword(s):  
Risk Factors ◽  
Pregnant Women ◽  
Falciparum Malaria ◽  
Low Birthweight ◽  
Young Age ◽  
Malaria In Pregnancy ◽  
Cross Sectional ◽  
Longitudinal Cohort ◽  
The Impact ◽  
In Pregnancy

Abstract Malaria in pregnancy remains a major problem of public health concern in Sub-Saharan Africa due to its endemicity and the diverse consequences on both the mother and the baby. Much attention, therefore, is needed to fully understand the epidemiology of the disease and to mitigate the devastating outcomes. The present study aimed at investigating malaria in pregnancy, its adverse effects on pregnant women and the impact on birthweight of babies. A total of 222 pregnant women gave their consent and were recruited into the study during their routine Antenatal care visits. This study employed a combination of cross-sectional and longitudinal cohort study designs. For 122 women in the cross-sectional arm, blood samples and data were obtained once, whilst 100 women in the longitudinal cohort arm were followed up from recruitment until delivery. Demographic information, obstetric history and risk factors were obtained by administering questionnaires. About 1.0 ml of venous blood was drawn to determine malaria parasitaemia and anaemia status of the participants. The birthweights of the babies were also taken at delivery. The prevalence of malaria and anaemia was 19.8% and 27.0% respectively at registration for all 222 participants. All infections were P. falciparum malaria. One hundred and forty-six (65.8%) of participants had ITN but only 72 (32.4%) used it the previous night. Young age and rural settings were risk factors for malaria. Young age and malaria positive pregnant women had increased risk of anaemia. In the follow-up group which ended with 54 participants, the overall prevalence of malaria and anaemia were 18.7% and 32.4% respectively. Fifty-two (96.3%) of pregnant women attended ANC ≥ 4 times and 55.6% took ≥ 3 doses of SP. There were two cases of miscarriage. Low birthweight occurred in 5.6% of babies. Both malaria and anaemia during pregnancy had no significant impact on birthweight of the babies. Although few of the babies had low birthweight, this number can be further reduced when pregnant women attend ANC and take SP at the recommended number of times.

scholarly journals Experimental Determination of the Force of Malaria Infection Reveals a Non-Linear Relationship to Mosquito Sporozoite Loads

2019 ◽  
Author(s):  
Maya Aleshnick ◽  
Vitaly V. Ganusov ◽  
Gibran Nasir ◽  
Gayane Yenokyan ◽  
Photini Sinnis
Keyword(s):  
Malaria Transmission ◽  
Malaria Infection ◽  
Malaria Parasite ◽  
Parasite Load ◽  
Rodent Model ◽  
Disease Spread ◽  
Mammalian Host ◽  
Small Subset ◽  
Non Linear ◽  
The Impact

AbstractPlasmodium sporozoites are the infective stage of the malaria parasite. Though this is a bottleneck for the parasite, the quantitative dynamics of transmission, from mosquito inoculation of sporozoites to patent blood-stage infection in the mammalian host, are poorly understood. Here we utilize a rodent model to determine the probability of malaria infection after infectious mosquito bite, and consider the impact of mosquito parasite load, blood-meal acquisition, probe-time, and probe location, on infection probability. We found that infection likelihood correlates with mosquito sporozoite load and, to a lesser degree, the duration of probing, and is not dependent upon the mosquito’s ability to find blood. The relationship between sporozoite load and infection probability is non-linear and can be described by a set of models that include a threshold, with mosquitoes harboring over 10,000 salivary gland sporozoites being 7.5 times more likely to initiate a malaria infection. Overall, our data suggest that the small subset of highly infected mosquitoes may contribute disproportionally to malaria transmission in the field and that quantifying mosquito sporozoite loads could aid in predicting the force of infection in different transmission settings.Author SummaryMalaria is a leading cause of death in many parts of the world. Infection is initiated when infected Anopheles mosquitoes inject sporozoites as they look for blood. Though transmission is a bottleneck for the parasite and thus a good point for intervention, many aspects of transmission remain poorly understood. In this study, using a rodent model of malaria, we found that less than 20% of infectious bites result in disease, demonstrating that the majority of infective bites do not result in malaria infection. Furthermore, we found that the bites of mosquitoes with heavy parasite burdens are 7.5 times more likely to result in disease. These data have important implications for designing interventions targeting transmission stages of the malaria parasite as they suggest that reducing parasite loads, even without completely eliminating them, could be effective against disease spread. We also found that mosquitoes that probe but do not succeed in finding blood are equally likely to initiate infection, an important finding for human vaccine trials. Together, this work adds to our understanding of malaria transmission dynamics and our capacity to develop malaria elimination strategies.

scholarly journals The ethics and management of cannabis use in pregnancy following decriminalisation and licensing for medical use: narrative review

2021 ◽  
pp. 1-10
Author(s):  
Abdulazeez Towobola ◽  
Basirat Towobola ◽  
Bosky Nair ◽  
Arti Makwana
Keyword(s):  
Management Strategies ◽  
Narrative Review ◽  
Cannabis Use ◽  
Review Of Literature ◽  
Ethical Concerns ◽  
The Past ◽  
International Trends ◽  
Drug Policies ◽  
The Impact ◽  
In Pregnancy

Aims and method As drug policies pertaining to cannabis use become more liberalised, the prevalence of cannabis use in pregnancy could increase. However, there is limited guidance available for clinicians. This paper presents a narrative review of literature published in the past 16 years (2006–2021) to (a) address the impact of legalisation and decriminalisation on the risks, ethics and support of women who use cannabis during pregnancy and (b) develop guidance for clinicians. Results Both national and international trends suggest increased use of cannabis over the past decade, while the risks of cannabis use for recreational or medicinal purposes in pregnancy remain unmitigated. Clinical implications This review confirmed that the recommendation of cannabinoid-based products for pregnant and breast-feeding women is currently premature. More research is needed to address safety concerns. We discussed navigating ethical concerns and suggest targeted management strategies for clinicians treating pregnant women who choose to use cannabis.

scholarly journals EFFECT OF COMMUNITY-BASED SCHEDULED SCREENING AND TREATMENT (CSST) OF MALARIA IN PREGNANCY ON INFANT MALARIA INFECTION IN A SEASONAL MALARIA TRANSMISSION SETTING

2017 ◽  
Vol 2 (Suppl 2) ◽  
pp. A29.3-A30
Author(s):  
Ngozi Moneke-Anyanwoke ◽  
Julia Mwesigwa ◽  
Muna Affara ◽  
Jasseh Momodou ◽  
Ed Clarke ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Malaria Infection ◽  
Malaria In Pregnancy ◽  
Community Based ◽  
Transmission Setting ◽  
In Pregnancy

scholarly journals Comparative Analysis of Igg Responses to Recombinant Qβ Phage Displayed MSP3 and UB05 in Dual HIV-Malaria Infected Adults Living in areas differing in Malaria Transmission Intensities

2019 ◽  
Vol 4 (1) ◽  
Keyword(s):  
Malaria Transmission ◽  
Malaria Infection ◽  
Transmission Intensity ◽  
Igg Subclass ◽  
Double Negative ◽  
Igg Antibody ◽  
Low Transmission ◽  
Malaria Transmission Intensity ◽  
High Transmission ◽  
The Impact

Immunoglobulin G (IgG) specific responses against Plasmodium falciparum merozoite antigens such as the merozoite surface protein 3 (MSP3) and UB05 are known to play critical roles in parasiteamia control and protection from symptomatic illness. However when there is intense perennial malaria transmission coupled with concurrent infection with the human immunodeficiency virus type 1 (HIV), knowledge of IgG antibody response profiles is limited. In this study we assessed the impact of dual HIV-Malaria infections on IgG subclass responses to MSP3 (QβMSP3) and UB05 (QβUB05) in individuals living in two areas of Cameroon differing in malaria transmission intensity. We observed differences in antigen specific IgG and IgG subclass responses which were dependent upon the antigen type, malaria transmission intensity, HIV infection, malaria infection and dual HIV-malaria infections. Individuals living in high malaria transmission areas irrespective of HIV or malaria status had significantly higher IgG responses to both antigens (P=0.0001 for QβMSP3, P=0.0001 for QβUB05) than their counterpart from low transmission areas. When dual HIV-Malaria infection is considered significantly higher QβMSP3 specific IgG1 (P=0.0001) and IgG3 (P=0.04) responses in double negative individuals was associated with protection against malaria in low transmission areas. Increased QβUB05 specific IgG1 responses (P=0.0001) in double negative individuals were associated with protection in high transmission areas in contrast to significantly higher IgG3 responses to QβUB05 (P=0.0001) which were more relevant to protection in low malaria transmission areas in the same population. These findings imply that QβMSP3 might not be suitable as a standalone vaccine in areas differing in transmission intensity. However, antigenicity of UB05 most likely predicts immunity in both low and high transmission areas and could be used either alone or in combination with other antigens for vaccine studies in areas differing in transmission intensities. Understanding immune responses to QβUB05 and QβMSP3 could thus enable the development of efficacious vaccines or commensurate immunotherapeutic strategies suitable for areas differing in malaria transmission intensity.

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