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INFOGRAPHICS | Sharp drop in Covid-19 testing due to test kit, reagent shortage

Sanjay Kumar by Sanjay Kumar
9 months ago
in News
INFOGRAPHICS | Sharp drop in Covid-19 testing due to test kit, reagent shortage
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analysis for the week of 11 to 17 May 2020, testing had increased significantly since early March, but in the past two weeks under review (4-17 May), testing had declined – particularly for the week ending 17 May.

This was likely to due to shortages of testing kits and backlogs in labs.

A rolling seven-day average graphic of the number of tests done across public and private sectors, shows the decline after a long and sustained increase.

coronavirus

A rolling seven-day average of daily tests done across private and public laboratories shows how declining daily number of tests in recent days. (Graphic – Rudi Louw)

According to Health24, the report showed that laboratory delays, indicated by an increase in the number of days between the date the test is done and the specimen collected, and the reporting of the result, were more than six days for public labs.

coronavirus

coronavirus

Professor Glenda Davison, head of the biomedical sciences department at the Cape Peninsula University of Technology, told Health24 that test kit availability would definitely be a reason for a decrease in testing.

“The test kits are acquired from a number of international companies and are most often imported which could result in delays. The reason being that countries throughout the world are doing these tests and the supply just can’t keep up with the demand.”

Davison highlighted that the NHLS was locked into using test kits from specific manufacturers, such as Cepheid in the US – the company that manufactures the GeneXpert machines and test kits.

News24 previously reported that the US State Department had denied claims made by Mkhize in Parliament on 27 April that the US was restricting exports of the GeneXpert test kits.

“The GeneXpert kits are actually produced in the US. Since the US has put a restriction on the stuff being exported… the other company is operating out of Sweden and they have got some challenges which they have reported to us.

“We are hoping that they will get over those challenges … they have promised that they will be increasing their supply to us. We are aware the whole continent is looking for the same kits, so there is going to be quite a challenge,” said Mkhize. 

While the NHLS uses other machines as well, such as Cobas models made by Roche, the GeneXpert machines are a crucial part of its plans to ramp up testing capacity – which has been hampered by a shortage of kits from the start.

The GeneXperts are also fitted to mobile testing units procured by the NHLS, to be used in far-flung areas with no laboratory nearby.

The NHLS, responding to a query from News24, said it was experiencing challenges regarding extraction and test kits in that ordered supplied could not be delivered due to logistical challenges that were “outside the NHLS’ control”.

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