Tulio de Oliveira Profile picture
Mar 25, 2021 8 tweets 3 min read Read on X
We just submitted a pre-print 'A novel variant of interest (VOI) of SARS-CoV-2 with multiple spike mutations detected through travel surveillance in Africa.'

This VOI has 31 amino acids mutations. In Spike has 11 mutations and three deletions in the N-terminal domain Image
It has some key mutations, including the E484K, R346K and P681H. The R346K is the associated with resistance to class 3 RBD NAbs recently described by @jbloom_lab
There are also 5 substitutions and 3 deletions in the NTD antigenic supersite (Y144Δ, R246M, SYL247-249Δ and W258L)
It the most diverse A lineage sequencers ever described. It also worry us as it was found in three travelers from Tanzania in Angola. There is almost no data from COVID-19 in Tanzania. Image
When compared with other variants of concern and variants of interest, this is the most divergent one. Image
Manuscript has been deposited at medRxiv and until online is freely accessible at: krisp.org.za/publications.p…

Sequences are available in GISAID with accessions: EPI_ISL_1347940, EPI_ISL_1347941, EPI_ISL_1347942
We decided to report this as a new VOI given the constellation of mutations with known or suspected biological significance, specifically resistance to neutralizing antibodies and potentially increased transmissibility.
Whilst we have only detected three cases with this new VOI, this warrants urgent investigation as the source country, Tanzania, has a largely undocumented epidemic and few public health measures in place to prevent spread within and out of the country.
Thanks @AfricaCDC, Minister of Health of Angola, @rjlessells @houzhou @Mittenavoig and many other colleagues from Angola and Africa to help on the analysis of the data.

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More from @Tuliodna

Jun 21
The number of Mpox cases double in South Africa. In total, 13 cases were detected and two deaths reported. In a short thread, I explain what we know about the Mpox outbreak in SA and what the country is doing to respond. 🧵
Yesterday, the National Department of Health reported another 6 cases of Mpox in South Africa, basically doubling the number of known cases on the largest outbreak ever recorded in SA. news24.com/news24/southaf…
What we know so far: 1 - Most of the cases were hospitalised, so it is not surprising that as awareness growth that we would detect more cases, we discuss that we expect this that in the Sunday Times/Times Live last week.
Read 13 tweets
Jun 16
A summary of Mpox outbreaks, new variants & deaths in South Africa and Africa that we are tracking and make data public in real time. Clade IIb causing first 2 deaths in SA and new variant, Clade Ib, emerging in mining town in DRC. A short thread ⬇️
This week, the minister of health of SA released the news of an outbreak in the country. When he released the news on Wednesday, there was 5 cases and 1 death. By Saturday, there was 7 cases and 2 deaths.
The AfricaCDC and WHO are supporting SA, and both released press-release and are trying to get both therapy (tecovirimat) and vaccines (MVA-BN) to SA.
Read 16 tweets
Jun 12
In South Africa, today, the Health Minister reported the first death due to Mpox. In addition, 5 cases are now confirmed since 8 May 2024. Suggesting that SA is experience its first large outbreak of Mpox. A summary thread on what we know on the Mpox situation in SA⬇️
Investigation of the cases, by the NICD suggest local transmission as none of the 5 cases had an history of travel outside SA. In addition, the cases were unlinked cases found in two provinces in Gauteng and KwaZulu-Natal (the two largest provinces in SA). Image
Of the five cases, one unfortunately died 2 days ago. One patient has been discharged, one discharged for home isolation and follow ups being made. Two cases are still admitted in hospital. gov.za/news/media-sta…
Read 12 tweets
May 26
Africa’s cholera crisis worsens amid extreme weather events. “The outbreaks are getting much larger because the extreme climate events are getting much more common,” Tulio de Oliveira - A photojournalism piece covering extreme events & the worst cholera in Africa @AlJazeera @AP Image
Hospital beds in a ward dedicated to cholera patients at a government hospital in Lusaka. [Tsvangirayi Mukwazhi/AP Photo]Southern Africa’s latest outbreaks can be traced to the cyclones and floods that hit Malawi in late 2021 and early 2022, carrying the cholera bacteria to areas it does not normally reach.
A young girl fetches water from a well in Lilanda township in Lusaka, Zambia [Tsvangirayi Mukwazhi/AP Photo] Image
Read 12 tweets
Feb 1
Release of 8 new genomes of a new lineage of SARS-CoV-2 with > 100 mutations from South Africa. This is probably the most divergence lineage identified this year. In this thread, we highlight some of the characteristics of the new BA.2.X lineage and epidemiology in SA.
So far, this has been detected from eight samples from three districts in Limpopo and Gauteng provinces (Capricorn, City of Johannesburg and City of Tshwane) between 20 September and 29 November 2023. All eight genomes were sequenced by the NICD from SARS-CoV-2 genomic surveillance (routine diagnostic samples) or syndromic GP-based surveillance (Viral Watch) @nicd_sa
•The variant is genetically distinct from currently circulating Omicron lineages (particularly BA.2.86 and JN.1), and initial analysis suggests it has likely emerged from BA.2 or from the basal node of Omicron. Image
Read 22 tweets
Aug 31, 2023
South Africa has today detected a 3rd case of BA.2.86. In total, 3 genomes, 2 from Gauteng & 1 from Mapumalanga. Since the discovery of the first case, scientists advising the government have been alerted, here, I summarise SA advisory to this new lineage of COVID-19 🧵
South Africa is one of few countries of the world that still have an active genomics surveillance program and a scientific advisory board for the COVID-19 pandemic, which is called the Ministerial Advisory Board (MAC) that advise the ministers.
As the new Omicron BA.2.86 lineage has over 30 extra mutations was spotted in Denmark and Israel, SA increase genomics surveillance and inform the ministers. We also had special seating of the Ministerial Advisory Board (MAC) to discuss the implications of BA.2.86 2 weeks ago.
Read 16 tweets

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