Investment in SARS-CoV-2 sequencing in Africa over the past year has led to a major increase in the number of sequences generated, now exceeding 100,000 genomes, used to track the pandemic on the continent. Our results show an increase in the number of African countries able to sequence domestically, and highlight that local sequencing enables faster turnaround time and more regular routine surveillance. Despite limitations of low testing proportions, findings from this genomic surveillance study underscore the heterogeneous nature of the pandemic and shed light on the distinct dispersal dynamics of Variants of Concern, particularly Alpha, Beta, Delta, and Omicron, on the continent. Sustained investment for diagnostics and genomic surveillance in Africa is needed as the virus continues to evolve, while the continent faces many emerging and re-emerging infectious disease threats. These investments are crucial for pandemic preparedness and response and will serve the health of the continent well into the 21st century.
Background and study aims
Frontlines healthcare workers (HCWs) during the coronavirus disease 2019 (COVID-19) pandemic are at increased risk of infection by SARS-CoV-2, but there are limited data on the prevalence of COVID-19 among HCWs in Egypt. This study aimed to assess SARS-CoV-2 infection among HCWs providing gastroenterological services.
Subjects and methods
Seventy-four HCWs at the gastroenterological service of Al-Manial University Hospital, the main hospital of the largest tertiary university hospitals complex in Egypt (Kasr Al-Ainy Faculty of Medicine, Cairo University) were tested using real-time reverse transcription–polymerase chain reaction (RT-PCR) on nasopharyngeal samples, and rapid serological IgM/IgG tests (RST). A questionnaire was used to collect demographic, occupational and clinical data.
Results
Of the 74 HCWs, 10 tested positive by RT-PCR (13.5%). In 9/74 (12.2%) HCWs, antibodies could be detected by RST: three with both IgM and IgG lines; six with IgM line only and none with IgG line only. Frequency of positive tests was more among subjects with minor symptoms compared to completely asymptomatic HCWs (50% vs 16.1%, respectively). Neither age, gender or occupation was a risk factor for SARS-CoV-2 infection.
Conclusions
Point prevalence of COVID-19 in gastroenterology HCWs is 13.5% by RT-PCR. Continued measures are warranted to assure HCWs safety and reduce transmission from healthcare settings to the community during COVID-19 pandemic. Presence of positive test results among asymptomatic HCWs illustrates the importance of screening all HCWs irrespective of symptoms.
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