scholarly journals Seroprevalence of SARS-CoV-2 specific IgG antibodies in District Srinagar, northern India – A cross-sectional study

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0239303
Author(s):  
S. Muhammad Salim Khan ◽  
Mariya Amin Qurieshi ◽  
Inaamul Haq ◽  
Sabhiya Majid ◽  
Arif Akbar Bhat ◽  
...  
Keyword(s):  
Test Performance ◽  
Cross Sectional Study ◽  
Mitigation Measures ◽  
Igg Antibodies ◽  
Cross Sectional ◽  
Essential Information ◽  
Northern India ◽  
History Of ◽  
Specific Igg ◽  
Specific Igg Antibodies

Background Prevalence of IgG antibodies against SARS-CoV-2 infection provides essential information for deciding disease prevention and mitigation measures. We estimate the seroprevalence of SARS-CoV-2 specific IgG antibodies in District Srinagar. Methods 2906 persons >18 years of age selected from hospital visitors across District Srinagar participated in the study. We tested samples for the presence of SARS-CoV-2 specific IgG antibodies using a chemiluminescent microparticle immunoassay-based serologic test. Results Age- and gender-standardized seroprevalence was 3.6% (95% CI 2.9% to 4.3%). Age 30–69 years, a recent history of symptoms of an influenza-like-illness, and a history of being placed under quarantine were significantly related to higher odds of the presence of SARS-CoV-2 specific IgG antibodies. The estimated number of SARS-CoV-2 infections during the two weeks preceding the study, adjusted for test performance, was 32602 with an estimated (median) infection-to-known-case ratio of 46 (95% CI 36 to 57). Conclusions The seroprevalence of SARS-CoV-2 specific IgG antibodies is low in the District. A large proportion of the population is still susceptible to the infection. A sizeable number of infections remain undetected, and a substantial proportion of people with symptoms compatible with COVID-19 are not tested.

scholarly journals Seroprevalence of SARS-CoV-2 specific IgG antibodies in District Srinagar, northern India – a cross-sectional study

2020 ◽  
Author(s):  
S Muhammad Salim Khan ◽  
Mariya Amin Qurieshi ◽  
Inaamul Haq ◽  
Sabhiya Majid ◽  
Arif Akbar Bhat ◽  
...  
Keyword(s):  
Test Performance ◽  
Cross Sectional Study ◽  
Mitigation Measures ◽  
Igg Antibodies ◽  
Cross Sectional ◽  
Essential Information ◽  
Northern India ◽  
History Of ◽  
Specific Igg ◽  
Specific Igg Antibodies

AbstractBackgroundPrevalence of IgG antibodies against SARS-CoV-2 infection provides essential information for deciding disease prevention and mitigation measures. We estimate the seroprevalence of SARS-CoV-2 specific IgG antibodies in District Srinagar.Methods2906 persons >18 years of age selected from hospital visitors across District Srinagar participated in the study. We tested samples for the presence of SARS-CoV-2 specific IgG antibodies using a chemiluminescent microparticle immunoassay-based serologic test.ResultsAge- and gender-standardized seroprevalence was 3.6% (95% CI 2.9% to 4.3%). Age 30-69 years, a recent history of symptoms of an influenza-like-illness, and a history of being placed under quarantine were significantly related to higher odds of the presence of SARS-CoV-2 specific IgG antibodies. The estimated number of SARS-CoV-2 infections during the two weeks preceding the study, adjusted for test performance, was 32602 with an estimated (median) infection-to-known-case ratio of 46 (95% CI 36 to 57).ConclusionsThe seroprevalence of SARS-CoV-2 specific IgG antibodies is low in the District. A large proportion of the population is still susceptible to the infection. A sizeable number of infections remain undetected, and a substantial proportion of people with symptoms compatible with COVID-19 are not tested.

Seroepidemiology of pertussis in a cross-sectional study of an adult general population in Denmark

2013 ◽  
Vol 142 (4) ◽  
pp. 729-737 ◽  
Author(s):  
P. F. RØNN ◽  
T. DALBY ◽  
J. SIMONSEN ◽  
C. S. JØRGENSEN ◽  
A. LINNEBERG ◽  
...  
Keyword(s):  
Adult Population ◽  
Cross Sectional Study ◽  
Igg Antibodies ◽  
Sectional Study ◽  
Prevention Strategies ◽  
Pertussis Infection ◽  
Cross Sectional ◽  
Specific Igg ◽  
Official Data ◽  
Specific Igg Antibodies

SUMMARYAn increase in pertussis has been observed in several countries over the last decades, especially in adult populations. The seroprevalence of pertussis was determined in a cross-sectional study of the adult population in the Copenhagen area, Denmark, conducted between 2006 and 2008. Specific IgG antibodies against pertussis toxin (PT) were measured in 3440 persons resulting in an age-standardized seroprevalence of 3·0% (95% confidence interval 1·9–4·7) using an IgG anti-PT cut-off of 75 IU/ml. By using antibody decay profiles from longitudinal data the estimated seroincidence was 143/1000 person-years. In contrast, an incidence of 0·03/1000 person-years was estimated from the official data of notified cases during the same period. Of the investigated risk factors, only age and education were significantly associated with pertussis infection. This study indicates that pertussis is highly underestimated in the adult population in Denmark, which has implications for future prevention strategies, including raising the awareness of pertussis.

scholarly journals Seroprevalence of Sindbis virus and associated risk factors in northern Sweden

2013 ◽  
Vol 142 (7) ◽  
pp. 1559-1565 ◽  
Author(s):  
C. AHLM ◽  
M. ELIASSON ◽  
O. VAPALAHTI ◽  
M. EVANDER
Keyword(s):  
Risk Factors ◽  
Rural Communities ◽  
Sindbis Virus ◽  
Multiple Logistic Regression Analysis ◽  
Northern Sweden ◽  
Igg Antibodies ◽  
History Of ◽  
Specific Igg ◽  
Associated Risk Factors ◽  
Specific Igg Antibodies

SUMMARYMosquito-borne Sindbis virus (SINV) cause disease characterized by rash, fever and arthritis which often leads to long-lasting arthralgia. To determine the seroprevalence of SINV and associated risk factors in northern Sweden, a randomly selected population aged between 25 and 74 years were invited to join the MONICA study. Serum from 1611 samples were analysed for specific IgG antibodies. Overall, 2·9% had IgG against SINV. More men (3·7%) than women (2·0%) were SINV seropositive (P = 0·047) and it was more common in subjects with a lower educational level (P = 0·013) and living in small, rural communities (P < 0·001). Seropositivity was associated with higher waist circumference (P = 0·1), elevated diastolic blood pressure (P = 0·037), and history of a previous stroke (P = 0·011). In a multiple logistic regression analysis, adjusting for known risk factors for stroke, seropositivity for SINV was an independent predictor of having had a stroke (odds ratio 4·3, 95% confidence interval 1·4–13·0, P = 0·011).

scholarly journals ASSOCIATION OF SEROPOSITIVITY FOR CMV IGM AND IGG WITH ADVERSE PREGNANCY OUTCOME

2021 ◽  
Vol 71 (3) ◽  
pp. 831-35
Author(s):  
Ambreen Amna ◽  
Farkhunda Nadeem ◽  
Amin Fahim ◽  
Altaf Hussian Jatoi ◽  
Kanwal Abbas ◽  
...  
Keyword(s):  
Pregnancy Outcome ◽  
Adverse Pregnancy Outcome ◽  
Cross Sectional Study ◽  
Reproductive Age ◽  
University Hospital ◽  
Igg Antibodies ◽  
Cross Sectional ◽  
History Of ◽  
Adverse Pregnancy ◽  
Reproductive Age Group

Objective: To find out the prevalence of antibodies against cytomegalovirus and their association with adverse pregnancy outcome in women, at Isra University Hospital Hyderabad. Study Design: Cross-sectional study. Place and Duration of Study: Department of Gynaecology & Obstetrics, Isra University Hospital (IUH) Hyderabad, from Jan to Jun 2018. Methodology: Cytomegalovirus IgM and IgG antibodies in 305 women of reproductive age group were measured using the Enzyme Linked Fluorescent Assaysystem kit. Results: The combined positivity of anti cytomegalovirus IgG and IgM antibodies was 93 (30.40%). About 37 (37.37%) and 28 (34.14%) women were found to be seropositive for cytomegalovirus antibodies who had history of spontaneous miscarriage and recurrent miscarriages respectively. Conclusion: Higher association of seropositivity for cytomegalovirus IgM and IgG with bad obstetrical history and low economy was found.

scholarly journals Seroprevalence of SARS-CoV-2-specific IgG antibodies in Kashmir, India, 7 months after the first reported local COVID-19 case: results of a population-based seroprevalence survey from October to November 2020

BMJ Open ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. e053791
Author(s):  
S Muhammad Salim Khan ◽  
Mariya Amin Qurieshi ◽  
Inaamul Haq ◽  
Sabhiya Majid ◽  
Javid Ahmad ◽  
...  
Keyword(s):  
Sampling Design ◽  
Final Analysis ◽  
Population Based ◽  
Secondary Outcome ◽  
Igg Antibodies ◽  
Serum Samples ◽  
History Of ◽  
Specific Igg ◽  
Index Value ◽  
Specific Igg Antibodies

ObjectivesWe designed a population-based survey in Kashmir to estimate the seroprevalence of SARS-CoV-2-specific IgG antibodies in the general population aged 18 years and above.SettingThe survey was conducted among 110 villages and urban wards across 10 districts in Kashmir from 17 October 2020 to 4 November 2020.ParticipantsIndividuals aged 18 years and above were eligible to be included in the survey. Serum samples were tested for the presence of SARS-CoV-2-specific IgG antibodies using the Abbott SARS-CoV-2 IgG assay.Primary and secondary outcome measuresWe labelled assay results equal to or above the cut-off index value of 1.4 as positive for SARS-CoV-2-specific IgG antibodies. Seroprevalence estimates were adjusted for the sampling design and assay characteristics.ResultsOut of 6397 eligible individuals enumerated, 6315 (98.7%) agreed to participate. The final analysis was done on 6230 participants. Seroprevalence adjusted for the sampling design and assay characteristics was 36.7% (95% CI 34.3% to 39.2%). Seroprevalence was higher among the older population. Among seropositive individuals, 10.2% (247/2415) reported a history of COVID-19-like symptoms. Out of 474 symptomatic individuals, 233 (49.2%) reported having been tested. We estimated an infection fatality rate of 0.034%.ConclusionsDuring the first 7 months of the COVID-19 epidemic in Kashmir Valley, approximately 37% of individuals were infected. The reported number of COVID-19 cases was only a small fraction of the estimated number of infections. A more efficient surveillance system with strengthened reporting of COVID-19 cases and deaths is warranted.

THE CONTENT OF ANTIBODIES TO THE SARS-COV-2 VIRUS IN STUDENTS OF A HIGHER EDUCATIONAL INSTITUTION

2021 ◽  
Author(s):  
V.T. Akhmetshina ◽  
◽  
L.G. Gizatullina ◽  
L.M. Masyagutova
Keyword(s):  
Educational Institution ◽  
Dynamic Monitoring ◽  
Igg Antibodies ◽  
Average Value ◽  
Population Immunity ◽  
History Of ◽  
Specific Igg ◽  
Higher Educational ◽  
Antibody Levels ◽  
Specific Igg Antibodies

Abstract: Abstract: Today, a request is being formed to prevent the introduction of infection into organized groups by means of the formation of population immunity by methods of specific prevention. Purpose of the work: To carry out the determination of specific IgG antibodies to SARS-CoV-2 in students of a higher educational institution, to determine the number of students in need of vaccination. Material and research methods: The level of IgG antibodies to SARS-CoV-2 in the blood serum of students of a higher educational institution was analyzed. An analysis of the strength of immunity shows that the average value of the CP of positive samples is 11.3. A more significant diagnostic level of CP was revealed, indicating a pronounced tension of immunity in students with a history of pneumonia. Among those with a diagnostically significant positive CP level, more than a third of the examined subjects have lower IgG antibodies to SARS-CoV-2 than the average in this group. Consequently, these individuals require dynamic observation and monitoring of antibody levels in order to ensure timely vaccination. Thus, specific IgG antibodies to SARS-CoV-2 were detected in half of the examined students, which was 55%. It is this group that is subject to immediate vaccination before undergoing industrial practice. A third of students with low levels of antibodies to SARS-CoV-2 need dynamic monitoring of their content.

scholarly journals Induction of SARS-Cov-2-Specific IgG and IgA in Serum and Milk with Different SARS-CoV-2 Vaccines in Breastfeeding Women: A Cross-Sectional Study in Northern Spain

2021 ◽  
Vol 18 (16) ◽  
pp. 8831
Author(s):  
Carolina Lechosa-Muñiz ◽  
María Paz-Zulueta ◽  
Jose Manuel Mendez-Legaza ◽  
Juan Irure-Ventura ◽  
Rocío Cuesta González ◽  
...  
Keyword(s):  
Breast Milk ◽  
Adverse Reactions ◽  
Protein S ◽  
Vaccine Safety ◽  
Cross Sectional Study ◽  
Igg Antibodies ◽  
Northern Spain ◽  
Cross Sectional ◽  
Mean Values ◽  
Specific Igg

Breastfeeding mothers were excluded from the clinical trials conducted for vaccines against SARS-COV2. Since the start of the vaccination, some doubts have arisen regarding its compatibility with breastfeeding. The aim of this study was to analyse the presence of anti-SARS-CoV-2 antibodies in breast milk and serum (IgG and IgA) of vaccinated breastfeeding women. The main variables of the observational study were: adverse related events after vaccination and determination of the presence of IgG and IgA isotypes antibodies in serum and in breast milk of vaccinated women against the SARS-CoV-2 antigens. Results: 110 breastfeeding mothers were included; 70 women (63.6%) were vaccinated with two doses of BNT162b2, 20 women (18.2%) with two doses of mRNA-1273, and 20 women (18.2%) with a single dose of ChAdOx1-S. Regarding adverse reactions and vaccine safety, 38 women had no adverse reactions; 20 (18.2%) had general malaise or adenopathies; 10 (9.1%) had a headache; and 7 (6.4%) had fever. When analysing IgG antibodies, significantly higher levels of antibodies were found in serum and breast milk from mothers vaccinated with BNT162b2 or mRNA-1273 vs. ChAdOx1-S (p < 0.001 and p = 0.001, respectively). Analysing IgA antibodies, significant differences were found when comparing mean values in serum from mothers vaccinated with BNT162b2 or mRNA-1273 vs. ChAdOx1-S (0.12, 0.16, and 0.02, respectively; p < 0.001) and breast milk of mothers vaccinated when comparing BNT16b2 vs. ChAdOx1-S. All vaccinated breastfeeding mothers had serum anti-S1 IgG antibodies in response to vaccination against SARS-CoV-2, regardless of the commercial vaccine administered. Conclusions: the anti-SARS-CoV-2 vaccines were well tolerated by the mothers and the breastfed infant. In addition, breastfeeding mothers offer their infants IgA and IgG isotype antibodies directed against SARS-CoV-2 protein S in breast milk.

scholarly journals SARS-CoV-2 seroprevalence in healthcare workers of dedicated-COVID hospitals and non–COVID hospitals of District Srinagar, Kashmir

2020 ◽  
Author(s):  
Muhammad Salim Khan ◽  
Inaamul Haq ◽  
Mariya Amin Qurieshi ◽  
Sabhiya Majid ◽  
Arif Akbar Bhat ◽  
...  
Keyword(s):  
Healthcare Workers ◽  
High Risk Group ◽  
Infection Prevention And Control ◽  
Institutional Setting ◽  
Igg Antibodies ◽  
Rt Pcr ◽  
Serum Samples ◽  
Cross Sectional ◽  
Specific Igg ◽  
Specific Igg Antibodies

AbstractBackground and objectiveSARS-CoV-2 infection poses tremendous challenge to the healthcare system of nations across the globe. Serological testing for SARS-CoV-2 infection in healthcare workers, which form a high-risk group, helps in identifying the burden of hidden infection in an institutional setting.MethodsWe present the results of a cross-sectional serosurvey in healthcare workers from two different hospital settings based on their role in the management of SARS-CoV-2 patients in District Srinagar, Kashmir. In addition to testing for the presence of SARS-CoV-2 specific IgG, we collected information on influenza-like symptoms in the last four weeks and the status of RT-PCR testing. SARS-CoV-2 specific IgG antibodies were detected in serum samples using a sensitive and specific chemiluminescent microparticle immunoassay technology.Interpretation and ConclusionOf 2915 healthcare workers who participated in the study, we analysed data from 2905 healthcare workers. The overall prevalence of SARS-CoV-2 specific IgG antibodies was 2.5% (95% CI 2.0-3.1) in the healthcare workers of District Srinagar. Healthcare workers who had ever worked at a dedicated-COVID hospital had a substantially lower seroprevalence of 0.6% (95% CI: 0.2 - 1.9). Among healthcare workers who had tested positive for RT-PCR, seroprevalence was 27.6% (95% CI: 14.0 - 47.2).The seroprevalence of SARS-CoV-2 infection in healthcare workers of District Srinagar is low, reflecting that a high proportion of healthcare workers are still susceptible to the infection. It is crucial to lay thrust on infection prevention and control activities and standard hygiene practices by the healthcare staff to protect them from acquiring infection within the healthcare setting.

scholarly journals Measles and Rubella Serosusceptibity Among Population Vaccinated with Different Schedule of Vaccination: The Potential Impact on Measles Elimination in Iran.

2020 ◽  
Author(s):  
Hana Saffar ◽  
Maryam Khalifeloo ◽  
Mohammed-Jafar Saffar ◽  
Ali-Reza Abdollahi ◽  
Mohammad-Reza Parsaei ◽  
...  
Keyword(s):  
Age Groups ◽  
Cross Sectional Study ◽  
Healthy Population ◽  
Relative Distribution ◽  
Igg Antibodies ◽  
Mmr Vaccine ◽  
High Coverage ◽  
Cross Sectional ◽  
History Of ◽  
Iranian Children

Abstract Background: In addition to schedule 2-doses monovalent measles vaccine (mMV) immunization of Iranian children since 1984, a nationwide campaign of measles-rubella (MR) immunization among 5- 25 years-old population in December 2003 was conducted. From 2004 mMV was replaced with measles- mumps-rubella (MMR) vaccine. Despite a high vaccination coverage, outbreaks of measles occurred in the country. Study was designed to investigate seroimmunity against measles and rubella among various age groups of population who were vaccinated with different schedule since 1984. Also, immunologic response to revaccination in seronegative subjects was evaluated. Methods: From 1 November 2017 to 30 June 2018 a cross- sectional study among 7- 33 year old healthy population with documented history of measles vaccination was conducted. Based on their age and history of vaccination categorized as GA: 20-23 years old; vaccinated with 1-2 dose of mMV, and also MR revaccinated. GB: 15-19 years, vaccinated only with 2- doses of mMV at the ages of 9 and 15 months. GC: 12-14 years and GD: 7-11 years; vaccinated with 2- dose of MMR vaccine at the ages 15 months - 6 years, and 12-18 month respectively. Collected sera were assessed to measure antimeasles and antirubella IgG antibodies concentration. Four to 6 weeks after revaccination of seronegative subjects, antimeasles-antirubella IgM and IgG antibodies were rechecked. Collected data were analyzed using descriptive statistical methods.Results: Totally 635 individuals, 312 female were included. Relative distribution of subjects in each group was as: GA: 98, GB: 295, GC: 139, and GD: 103 persons. Overall, 12.28% and 18.4% of population were soronegative, and varied greatly between groups: 2%-0/0%, 15.2%- 25.0%, 11.5%- 17.2%; and 14.6%-18.4% to measles and rubella, respectively. After revaccination, 92% and 94.9% showed 1gG response to measles and rubella vaccine respectively.Conclusion: Despite high coverage rate with measles containing vaccine, a significant numbers of vaccinated subjects lost their seroprotection, possibly because of secondary vaccine failure. This may affect measles-rubella elimination goal in the country. If these data were confirmed by further studies, more strengthen regional/ national supplementary immunization activity should be considered.

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