Several union officials and workers confirmed that sick-out was underway at the Georgetown Public Hospital Corporation (GPHC), New Amsterdam Hospital, West Demerara Regional Hospital and the Linden Hospital Complex.
Feedback about the effectiveness of the two-day sick-out, which ends on Friday, has been so far mixed. One union representative did not expect 100 percent favourable response because there are those who will still go out to work.
Top officials of the Guyana Public Service Union (GPSU) accused the management of the Linden Hospital Complex of threatening to mark down workers reporting sick as absent with the ultimate aim of deducting pay.
Officials, however, noted that legally workers can report sick up to three days after which they must submit a medical certificate.
Intensification of the industrial unrest follows at least three weeks of picketing demonstrations outside government agencies and the Office of the President against the pay-hike.
The GPSU is demanding an interim 15 percent pay increase for this year and the start of negotiations for an overall 25 percent hike.
But government has been repeatedly saying that it could afford to pay only five percent.