ArticleAmerican journal of infection control2021
The role of close contacts of COVID-19 patients in the SARS-CoV-2 transmission: an emphasis on the percentage of nonevaluated positivity in Mexico.
Article in American journal of infection control, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 4 of them syntheses that pooled it.
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Who cites it
18 citing papers in PubMed, 4 syntheses or guidelines pooled it.
- Infection rate and factors affecting close contacts of COVID-19 cases: A systematic review.Journal of evidence-based medicine · 2022Pooled it
- Global Percentage of Asymptomatic SARS-CoV-2 Infections Among the Tested Population and Individuals With Confirmed COVID-19 Diagnosis: A Systematic Review and Meta-analysis.JAMA network open · 2021Pooled it
- Using secondary cases to characterize the severity of an emerging or re-emerging infection.Nature communications · 2021Pooled it
- Asymptomatic SARS-CoV-2 infection: A systematic review and meta-analysis.Proceedings of the National Academy of Sciences of the United States of America · 2021Pooled it
- Incidence of hospital-acquired toxin-producing clostridioides difficile infection between the pre-pandemic (2017-2019) and pandemic (2020-2022): a retrospective cohort study.Archives of public health = Archives belges de sante publique · 2026Article
- An after-action review of COVID-19 cases and mitigation measures at US Mission India, March 2020-July 2021.PLOS global public health · 2025Article
- Gene Variants of the OAS/RNase L Pathway and Their Association with Severity of Symptoms and Outcome of SARS-CoV-2 Infection.Journal of personalized medicine · 2024Article
- Quantifying the impact of SARS-CoV-2 temporal vaccination trends and disparities on disease control.Science advances · 2023Article
- Asymptomatic versus symptomatic SARS-CoV-2 infection: a cross-sectional seroprevalence study.Tropical medicine and health · 2022Article
- Radiological Findings Increased the Successful of COVID-19 Diagnosis in Hospitalized Patients Suspected of Respiratory Viral Infection but with a Negative First SARS-CoV-2 RT-PCR Result.Diagnostics (Basel, Switzerland) · 2022Article
- Evaluation of the Potential Risk of Mortality from SARS-CoV-2 Infection in Hospitalized Patients According to the Charlson Comorbidity Index.Healthcare (Basel, Switzerland) · 2022Article
- COVID-19 hot-spot strategy: a special innovation in pandemic response, Oyo State Nigeria.BMC public health · 2022Article
- Epidemiology, Clinico-Pathological Characteristics, and Comorbidities of SARS-CoV-2-Infected Pakistani Patients.Frontiers in cellular and infection microbiology · 2022Article
- Article
- The role of airborne particles and environmental considerations in the transmission of SARS-CoV-2.Geoscience frontiers · 2021Review
- An evaluation of patients with a previous endemic coronavirus infection during the COVID-19 pandemic.Journal of medical virology · 2021Article
- Population-Based COVID-19 Screening in Mexico: Assessment of Symptoms and Their Weighting in Predicting SARS-CoV-2 Infection.Medicina (Kaunas, Lithuania) · 2021Article
- Single-Cell Immunogenomic Approach Identified SARS-CoV-2 Protective Immune Signatures in Asymptomatic Direct Contacts of COVID-19 Cases.Frontiers in immunology · 2021Article
Corrections and comments
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Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesTo determine the percentage of positivity of close contacts of coronavirus disease 19 (COVID-19) patients to depict the importance of asymptomatic infections in the patient-to-patient transmission of COVID-19.
methodsOne hundred subjects were included. Nineteen index COVID-19 cases and 81 traced close contacts were screened for coronavirus 2 of severe acute respiratory syndrome (SARS-CoV-2) using real-time reverse transcription-polymerase chain reaction. Immunoglobulin M and G against SARS-CoV-2 were evaluated by rapid test.
resultsThirty-four (42%) contacts in the study were positive for SARS-CoV-2. Twenty-three (67.6%) manifested less than 2 respiratory symptoms, and 5 (14.7%) remained asymptomatic. The average of positive contacts by index COVID-19 case (R
conclusionThe proportion of close contacts of COVID-19 patients infected with SARS-CoV-2 (42%) and with less than 2 or with no respiratory symptoms (82.4%) was high in the study population. A low proportion of COVID-19 patients had a positive test for antibodies against SARS-CoV-2. The screening for SARS-CoV-2 in close contacts of COVID-19 positive patients should be encouraged to avoid spreading the infection and the expansion of the disease.
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