The Health Service Executive has brought a case against a creche owner in Killeagh, Co Cork for alleged breach of required standards.
Midleton District Court heard evidence this morning from a health environmental officer Lorraine Potter who visited the creche last November.
Ms Potter said she found several breaches of regulations at the creche, which is known as Tiny Tots and owned by Hazel O'Mahony.
Ms Potter told the court she had a bad feeling that something would happen in the crèche and "I had a pain in my chest".
She outlined the safety and hygiene concerns that she had discovered, but admitted that she took no photographs.
She told the court that during one visit there were only five staff at the creche in the morning even though there were 35 children.
She also said that in the baby room at one point there were nine children with just one staff member who was busy changing a child's nappy and not able to care for the other children.
Ms O'Mahony's solicitor said she will be vigorously contesting the charges of breaching safety standards and not maintaining a proper staff-child ratio.
Frank Buttimer said he had testimonials from 30 parents whose children have attended the creche and he said they will say it is operated to the highest standards.
The trial is expected to last two days.