Dataset Information

Seroprevalence of SARS-CoV-2 antibodies among children and adolescents recruited in a malariometric survey in north-eastern Tanzania July 2021.

ABSTRACT:

Background

African countries stand out globally as the region seemingly least affected by the COVID-19 pandemic, caused by the virus SARS-CoV-2. Besides a younger population and potential pre-existing immunity to a SARS-CoV-2-like virus, it has been hypothesized that co-infection or recent history of Plasmodium falciparum malaria may be protective of COVID-19 severity and mortality. The number of COVID-19 cases and deaths, however, may be vastly undercounted. Very little is known about the extent to which the Tanzanian population has been exposed to SARS-CoV-2. Here, we investigated the seroprevalence of IgG to SARS-CoV-2 spike protein in two Tanzanian rural communities 1½ years into the pandemic and the association of coinciding malaria infection and exposure.

Methods

During a malariometric survey in July 2021 in two villages in north-eastern Tanzania, blood samples were taken from 501 participants (0-19 years old). Malaria was detected by mRDT and microscopy. Levels of IgG against the spike protein of SARS-CoV-2 were measured by ELISA as well as IgG against five different antigens of P. falciparum; CIDRα1.1, CIDRα1.4 and CIDRα1.5 of PfEMP1 and GLURP and MSP3.

Results

The seroprevalence of SARS-CoV-2 IgG was 39.7% (106/267) in Kwamasimba and 32.5% (76/234) in Mkokola. In both villages the odds of being seropositive increased significantly with age (AOR = 1.12, 95% CI 1.07-1.17, p < 0.001). P. falciparum malaria prevalence by blood smear microscopy was 7.9% in Kwamasimba and 2.1% in Mkokola. 81.3% and 70.5% in Kwamasimba and Mkokola, respectively, showed recognition of minimum one malaria antigen. Residing in Kwamasimba was associated with a broader recognition (AOR = 1.91, 95% CI 1.34-2.71, p < 0.001). The recognition of malaria antigens increased significantly with age in both villages (AOR = 1.12; 95% CI 1.08-1.16, p < 0.001). Being SARS-CoV-2 seropositive did not associate with the breadth of malaria antigen recognition when adjusting for age (AOR = 0.99; 95% CI 0.83-1.18; p = 0.91).

Conclusion

More than a third of the children and adolescents in two rural communities in Tanzania had antibodies to SARS-CoV-2. In particular, the adolescents were seropositive but being seropositive did not associate with the status of coinciding malaria infections or previous exposure. In Tanzania, natural immunity may have developed fast, potentially protecting a substantial part of the population from later variants.

SUBMITTER: Lyimo E

PROVIDER: S-EPMC9652923 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Publications

Seroprevalence of SARS-CoV-2 antibodies among children and adolescents recruited in a malariometric survey in north-eastern Tanzania July 2021.

Lyimo Eric E Fougeroux Cyrielle C Malabeja Anangisye A Mbwana Joyce J Hayuma Paul M PM Liheluka Edwin E Turner Louise L Gesase Samwel S Lavstsen Thomas T Lusingu John P A JPA Minja Daniel T R DTR Wang Christian W CW

BMC infectious diseases 20221112 1

<h4>Background</h4>African countries stand out globally as the region seemingly least affected by the COVID-19 pandemic, caused by the virus SARS-CoV-2. Besides a younger population and potential pre-existing immunity to a SARS-CoV-2-like virus, it has been hypothesized that co-infection or recent history of Plasmodium falciparum malaria may be protective of COVID-19 severity and mortality. The number of COVID-19 cases and deaths, however, may be vastly undercounted. Very little is known about t ...[more]

PMID: 36371172

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Project description:BackgroundIndia began COVID-19 vaccination in January 2021, initially targeting healthcare and frontline workers. The vaccination strategy was expanded in a phased manner and currently covers all individuals aged 18 years and above. India experienced a severe second wave of COVID-19 during March-June 2021. We conducted a fourth nationwide serosurvey to estimate prevalence of SARS-CoV-2 antibodies in the general population aged ≥6 years and healthcare workers (HCWs).Methods and findingsWe did a cross-sectional study between 14 June and 6 July 2021 in the same 70 districts across 20 states and 1 union territory where 3 previous rounds of serosurveys were conducted. From each district, 10 clusters (villages in rural areas and wards in urban areas) were selected by the probability proportional to population size method. From each district, a minimum of 400 individuals aged ≥6 years from the general population (40 individuals from each cluster) and 100 HCWs from the district public health facilities were included. The serum samples were tested for the presence of IgG antibodies against S1-RBD and nucleocapsid protein of SARS-CoV-2 using chemiluminescence immunoassay. We estimated the weighted and test-adjusted seroprevalence of IgG antibodies against SARS-CoV-2, along with 95% CIs, based on the presence of antibodies to S1-RBD and/or nucleocapsid protein. Of the 28,975 individuals who participated in the survey, 2,892 (10%) were aged 6-9 years, 5,798 (20%) were aged 10-17 years, and 20,285 (70%) were aged ≥18 years; 15,160 (52.3%) participants were female, and 21,794 (75.2%) resided in rural areas. The weighted and test-adjusted prevalence of IgG antibodies against S1-RBD and/or nucleocapsid protein among the general population aged ≥6 years was 67.6% (95% CI 66.4% to 68.7%). Seroprevalence increased with age (p < 0.001) and was not different in rural and urban areas (p = 0.822). Compared to unvaccinated adults (62.3%, 95% CI 60.9% to 63.7%), seroprevalence was significantly higher among individuals who had received 1 vaccine dose (81.0%, 95% CI 79.6% to 82.3%, p < 0.001) and 2 vaccine doses (89.8%, 95% CI 88.4% to 91.1%, p < 0.001). The seroprevalence of IgG antibodies among 7,252 HCWs was 85.2% (95% CI 83.5% to 86.7%). Important limitations of the study include the survey design, which was aimed to estimate seroprevalence at the national level and not at a sub-national level, and the non-participation of 19% of eligible individuals in the survey.ConclusionsNearly two-thirds of individuals aged ≥6 years from the general population and 85% of HCWs had antibodies against SARS-CoV-2 by June-July 2021 in India. As one-third of the population is still seronegative, it is necessary to accelerate the coverage of COVID-19 vaccination among adults and continue adherence to non-pharmaceutical interventions.

Project description:IntroductionCaring for physically disabled children, particularly in contexts where resources are often insufficient or absent, exposes primary carers to significant psychological strain. The lack of structured mechanisms to address this psychological burden poses a considerable threat to the wellbeing of both carers and the children with disabilities under their care. However, research on the psychological wellbeing of carers in Tanzania is scarce. This study aimed to evaluate the psychological wellbeing and symptoms of anxiety and depression, along with associated factors, of carers of children, and adolescents with physical disabilities in the Kilimanjaro region.MethodsA cross-sectional survey was conducted from November 2020 to June 2021 in the Kilimanjaro region, involving 212 carers. The Swahili versions of the WHO-5 Wellbeing Index and Hopkins Symptoms Check List-25 were used to assess psychological wellbeing and symptoms of anxiety and depression. Data were analysed using IBM SPSS Statistics V.28. Multivariable linear and binary logistic regression were used to assess the associations.ResultsMore than four fifths (81%) of the carers were parents, and most of these parents were mothers (92%). Of the 212 carers, more than half (51%) exhibited poor psychological wellbeing, 42% had symptoms of anxiety, and 38% symptoms of depression. Notably, poor psychological wellbeing was significantly associated with symptoms of anxiety and depression. Results of a multivariable regression analysis indicated that extended family support was associated with better psychological wellbeing and lower odds of symptoms of anxiety and depression. A higher estimated monthly income was associated with better psychological wellbeing, and lower odds of symptoms of depression. Access to rehabilitation for the child was associated with improved psychological wellbeing and decreased likelihood of symptoms of anxiety.ConclusionMany carers of children, and adolescents with physical disabilities in Tanzania are at high risk of having poor psychological wellbeing, and symptoms of anxiety and depression. Support from extended-family networks is crucial in promoting good psychological wellbeing. The government in Tanzania should improve rehabilitation services, especially in disadvantaged rural areas, and integrate mental-health screening for carers in both rehabilitation programmes and primary healthcare.

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Dataset Information

Seroprevalence of SARS-CoV-2 antibodies among children and adolescents recruited in a malariometric survey in north-eastern Tanzania July 2021.

Background

Methods

Results

Conclusion

Publications

Seroprevalence of SARS-CoV-2 antibodies among children and adolescents recruited in a malariometric survey in north-eastern Tanzania July 2021.

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