Hospital hygiene group Tristel has told shareholders that first-half profits will be higher than it expected after strong momentum continued in the UK and overseas. At its annual general meeting, the AIM-listed infection and contamination control provider said it expected to reverse the previous year's first-half loss with a pre-tax profit of at least £0.6m on revenues no less than 36% higher at £6m. Chief Executive Paul Swinney said he believed the pattern of growth will continue in the second half and was confident the full-year would be ahead of market expectations.Broker FinnCap's current forecasts point to revenues of £11.4m and pre-tax profits of £0.9m.Swinney said the strong trading highlighted at the time of its preliminary results had continued and that it was seeing the impact of our restructured cost base.Growth had come from the UK and overseas, with a significant increase in sales of its decontaminating Tristel Wipes System globally and a break into profits for the Crystel clean room disinfectant range.Shares in Tristel were up 4.4% at 11:05 on Tuesday after coming off early highs. OH