The seasonally-adjusted PMI dropped to 43.6 points in January from 50.9 in December, falling far below the 50-point mark that separates expansion from contraction.

The index was partly dragged down by a sharp fall in the new sales orders sub-index, an indicator of demand.

The survey "reflects a very poor start to the year for the local manufacturing sector," bank Absa, which sponsors the PMI, said in a statement.

"Outside of the global financial crisis in 2008/09 and the pandemic-induced lockdown period of 2020, the index has only fallen to this low level a handful of times."

(Reporting by Alexander Winning; Editing by Bhargav Acharya)