Containment of a cluster of COVID-19 to prevent impending community transmission: experience from a rural area in South India

Authors

  • Divyamol Nallat Department of Community Medicine, Government Medical College, Palakkad, Kerala, India
  • Sreedevi C. Department of Community Medicine, Government Medical College, Palakkad, Kerala, India

DOI:

https://doi.org/10.18203/2320-6012.ijrms20220284

Keywords:

COVID-19, Cluster, Community transmission, Contact tracing, Risk assessment, Quarantine

Abstract

Background: On 23 July 2020, COVID-19 contact tracing cell was informed of a laboratory confirmed case of COVID-19 with substantial number of contacts. The current scenario under investigation is an example for a large outbreaks amenable to containment. If not contained immediately and effectively it may pass on to large community transmission.

Methods: Epidemiological investigation and contact tracing was carried out to identify the source and contacts of a confirmed case of COVID-19 reported on 22 July 2020. A semi-structured questionnaire prepared by COVID-19 contact tracing cell, Government Medical College (GMC), Palakkad was used to collect data on clinical characteristics, likely source of exposure and contacts made by the index case. High risk and low risk contacts were contacted over telephone to ensure quarantine, testing on 8th day (both for high risk contacts) and symptom monitoring.

Results: Total of 55 high risk contacts were identified, 15 of which were of high risk exposure. All 15 high risk contacts were kept in quarantine with testing on day 8 after last exposure. 7 new cases occurred among 15 the high risk contacts of which one turned out to be suspected primary, 5 secondary cases of index case and one secondary case of the suspected primary case. All secondary and low risk contacts were kept under symptom surveillance, and did not develop COVID-19.

Conclusions: Timely case notification coupled with complete and effective contact tracing and quarantining has contained the cluster and prevented it from emerging as large community transmission.

Author Biographies

Divyamol Nallat, Department of Community Medicine, Government Medical College, Palakkad, Kerala, India

Assistant Professor

Department of Community Medicine 

GMC Palakkad

Sreedevi C., Department of Community Medicine, Government Medical College, Palakkad, Kerala, India

Assistant Professor

Department of Community Medicine 

GMC Palakkad

References

Available at: https://www.mohfw.gov.in/pdf/COVID19VaccineOG111Chapter16.pdf accessed on 26th January 2022

Directorate of Health Services. COVID-19 Quarantine and Isolation guidelines. 2021. Available at: https://dhs.kerala.gov.in/wp-content/uploads/ 2020/06/Revised-Guideline-COVID-19-Testing-Quarantine-Isolation.pdf. Accessed on 27 August 2021.

Guidelines for contact tracing of COVID-19 cases in community settings. 2020. Available at: https://ncdc.gov.in/WriteRead Data/l892s/5543723 831596613278.pdf. Accessed on 01 January 2022.

MOHFW. Containment Plan for Large Outbreaks of COVID-19. Available at: https://www.mohfw.gov. in/pdf/3ContainmentPlanforLargeOutbreaksofCOVID19Final.pdf. Accessed on 01 January 2022.

Prabhu M, Cagino K, Matthews KC, Friedlander RL, Glynn SM, Kubiak JM, et al. Pregnancy and postpartum outcomes in a universally tested population for SARS‐CoV‐2 in New York City: a prospective cohort study. BJOG Int J Obstet Gynaecol. 2020;127(12):1548-56.

Ing AJ, Cocks C, Green JP. COVID-19: in the footsteps of Ernest Shackleton. Thorax. 2020;75(8):693-4.

Figueiredo R, Tavares S, Moucho M, Ramalho C. Systematic screening for SARS-CoV-2 in pregnant women admitted for delivery in a Portuguese maternity. J Perinat Med. 2020;48(9):977-80.

World Health Organisation. Q&A: Influenza and COVID-19 - similarities and differences. Available at: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/question-and-answers-hub/q-a-detail/q-a-similarities-and-differences-covid-19-and-influenza. Accessed on 01 January 2022.

World Health Organization. Contact tracing in the context of COVID-19: interim guidance. 2020. Available at: https://apps.who.int/iris/handle/10665/ 332049. Accessed on 02 May 2020.

Dinnes J, Deeks JJ, Berhane S, Taylor M, Adriano A, Davenport C, Dittrich S, Emperador D, Takwoingi Y, Cunningham J, Beese S. Rapid, point‐of‐care antigen and molecular‐based tests for diagnosis of SARS‐CoV‐2 infection. Cochrane Database of Systematic Reviews. 2021(3).

Albert E, Torres I, Bueno F, Huntley D, Molla E, Fernández-Fuentes MÁ, et al. Field evaluation of a rapid antigen test (Panbio™ COVID-19 Ag Rapid Test Device) for COVID-19 diagnosis in primary healthcare centres. Clin Microbiol Infect. 2021;27(3):472-7.

Khandker SS, Nik Hashim NH, Deris ZZ, Shueb RH, Islam MA. Diagnostic accuracy of rapid antigen test kits for detecting SARS-CoV-2: a systematic review and meta-analysis of 17,171 suspected COVID-19 patients. J Clin Med. 2021;10(16):3493.

Rathish B, Wilson A, Joy S. A comparison of COVID-19 secondary attack rate in household and close contacts compared to current risk stratification guidelines of the Kerala government. Tropical Doctor. 2021;00494755211002012.

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Published

2022-01-29

How to Cite

Nallat, D., & C., S. (2022). Containment of a cluster of COVID-19 to prevent impending community transmission: experience from a rural area in South India. International Journal of Research in Medical Sciences, 10(2), 414–418. https://doi.org/10.18203/2320-6012.ijrms20220284

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Section

Original Research Articles