- Title
- Analysis of early-phase contact tracing during the coronavirus disease 2019 outbreak in Mangaung Metro, Free State
- Creator
- Monyobo, Priscilla Kesaletseng
- Subject
- COVID-19 (Disease)
- Subject
- Contact tracing (Epidemiology)
- Subject
- Public health
- Date Issued
- 2022-09
- Date
- 2022-09
- Type
- Master's theses
- Type
- text
- Identifier
- http://hdl.handle.net/10353/23533
- Identifier
- vital:58105
- Description
- Background and Aim Contact tracing is a critical public health measure for controlling and preventing the spread of infectious diseases. Although the principles underlying this strategy are not novel, understanding the changes in infectiousness of COVID-19 is indeed novel. As are the capacity and operating procedures required to support disease investigation in Mangang Metro during the SARS-CoV-2 (COVID-19) pandemic. On 16 March 2020, the first coronavirus disease case in the area, which led to a larger outbreak, occurred in Mangaung Metro, Free State province, South Africa. To date, Mangaung Metro remains the epicentre of the COVID-19 pandemic and the primary driver of the caseload in the Free State province. The aim of this study was to analyse contact tracing data in Mangaung Metro during the early phase of the COVID-19 outbreak (16 March 2020 – 30 June 2020) in order to measure the viral transmissibility of COVID-19 in the early stages of the outbreak, specifically in the context of Mangaung Metro. Methods A descriptive systematic analysis of index COVID-19 cases and their contacts in Mangaung Metro was conducted. The review period ran from 16 March to 30 June 2020, during which there was a total of 1 001 cases in Mangaung Metro. Data was captured on an Excel spreadsheet using the contact line list variables from the established National Institute of Communicable Disease contact line list framework. The inferential statistics were based on a time series analysis to compare the impact of contact tracing stratified by symptomatology and the root cause of the cases to the overall cases in Mangaung Metro. The study determined whether isolation, quarantine, and contact tracing were able to control outbreaks in the early phase using characteristics of disease transmission and parameters particularised to the COVID- 19 pathogen. Results As of 30 June 2020, the Free State province had a total of 2 072 COVID-19 cases. Mangaung Metro contributed 1 001 cases (48percent) of the total number of cases in the study period. Between March and June 2020, 3 553 contacts were traced in Mangaung Metro. This number translates to at least three investigated and traced contacts per index or laboratory confirmed positive case. From the traced contacts, 1 080 samples were collected and sent for laboratory testing. In April 2020, the greatest number of samples were collected. This high rate in sample collection is posited to be the result of the high rate of contacts traced, as well as the initial clinical guidelines followed for contact tracing. Most positive contacts were discovered in March 2020. One of the possible reasons for the high detection of COVID-19 confirmed positive contacts during the early stages of the outbreak was the focus and importance of contact tracing while the caseload remained relatively low. However, as the outbreak progressed in the Mangaung Metro context, the number and relative percentage of positive cases detected through contact tracing decreased. In total, the positive contacts recorded in March 2020 amounted to 92 (51.3percent), 18 in April (10.5percent), 41 in May (22.9percent), and 28 in June (15.6percent). The March 2020 tracking rate was the highest at 73.2percent, with an average contact tracing rate of 15.5percentby the end of June 2020. Of all the contacts traced, 7.9percent involved healthcare workers in the Free State. Conclusion The study’s findings show that contact tracing was an effective control measure during the early stages of the COVID-19 outbreak in Mangung Metro district. Furthermore, the impact was greatest when the caseload was low and the burden on the healthcare system less severe. Mangaung Metro demonstrated the capability of tracing more contacts in the early-early phase of the outbreak; however, as the outbreak progressed to the latent early phase, the caseload increased and fewer contacts were traced. The consequence of contact tracing not being as effective during the latent early phase relates to the increase in both exposed and untraceable contacts, which in turn fueled the increase of new cases. This further impacted the at-risk and vulnerable population, especially the elderly, who were at an increased risk if not traced in a timely manner, possibly resulting in mortality.
- Description
- Thesis (MPH) -- Faculty of Health Sciences, 2022
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (63 leaves)
- Format
- Publisher
- University of Fort Hare
- Publisher
- Faculty of Health Sciences
- Language
- English
- Rights
- University of Fort Hare
- Rights
- All Rights Reserved
- Rights
- Open Access
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| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Monyobo_201928128_MPH Mini Dissertation.pdf | 1 MB | Adobe Acrobat PDF | View Details Download |