Kildare, Dublin and Wicklow accounted for 79 per cent of cases
Health officials are warning of a national outbreak of syphilis, and it is particularly prevalent in Kildare.
The Health Protection Surveillance Centre says while there was a decrease during the first lockdown 242 cases were reported in the first four months of this year.
There are concerns that there may be 'a large reservoir' of undiagnosed cases as many STI services have been operating at a reduced level due to the Covid-19 pandemic.
Untreated syphilis can cause serious health problems to the heart, brain, eyes and nervous system.
Kildare, Dublin and Wicklow accounted for 79 per cent of cases, followed by 9 per cent in Cork and Kerry.
91 per cent were in men and 9 per cent were in women.

Kfm Obituary Notices
Major Curragh Community College Project Moves Ahead After Years Of False Starts
Plans For Walking Trail Within Castletown House Lands Under Consideration Subject To Removal Of Laurel
Council Blames Stolen Cars As It Refuses Warning Signs At Crash-Prone Bridge In Celbridge
Naas No-Shows Add To Driving Test Pressure As Kildare Test Queue Hits 1,975
Naas Hospital Promised Just 21 Extra Mental Health Beds At Lakeview Ward - With No Timeline In Sight
R405 Hazelhatch Road To Close Between Loughtown Road And Athgoe Road For Major Pipeline Works
Local Demonstrations To Accompany Leinster House SNA Protest Amid Growing Backlash, Says Kildare TD