University Health Board provides healthcare services to a population of around 384,000 throughout Carmarthenshire, Ceredigion and Pembrokeshire.
Ms Harrop-Griffiths said ABMU was having a joint meeting with its neighbour at the end of June and that work had already taken place on the implications of Hywel Dda
's plans, "particularly the significant impact on Morriston Hospital, depending on the option put through".
(PS49.6m), Abertawe Bro Morgannwg (PS39.3m), Betsi Cadwaladr (PS29.8m) and Cardiff and Vale UHB (PS29.2m) each recorded significant overspends.
University Health Board's Sharon Daniel said: "Illnesses such as diarrhoea and vomiting can pass from one person to another very easily.
Director of nursing and midwifery Caroline Oakley at Hywel Dda
health board said: "The care offered to this patient fell below the standards expected and I would therefore like to apologise to the family again on behalf of the Health Board."
Bronglais has no specialist baby care unit for complicated births and bosses at Hywel Dda
Health Board have said babies who are born premature or who run into difficulties, are usually transferred to the nearest specialist centre.
Incidentally Shakin' Stevens (real name Michael Barratt) was also an Ely boy and attended Hywel Dda
. Obviously Jammo's music lessons must have done him some good!
University Health Board has unveiled three options for the future provision of healthcare in Carmarthenshire, Pembrokeshire and Ceredigion.
And Hywel Dda
UHB was described as facing a number of "long-standing challenges" and has not yet been able to produce a plan to address them.
The Hywel Dda
Health Board are carrying out a clinical services review across a number of hospitals in mid and west Wales and held a consultation event in Aberystw yth.
Health Board is planning a pounds 38m upgrade to Bronglais Hospital, in Aberystwyth.