Mother-of-four left shattered when twins were diagnosed with rare, devastating ...

A mother-of-four has told of the devastating effects a little-known herpes-like virus has had on her eight-year-old twins.

Kate Daly, from Sydney, was left heartbroken after she learnt both her twins, William and Emmaline, had been affected by cytomegalovirus (CMV).

The rare virus can be transferred from pregnant women onto their unborn babies and is transmitted through bodily fluids such as saliva, tears, urine and breast milk.  

While it's relatively harmless in healthy people, it can be debilitating for unborn babies - and in extreme cases can also claim their life.

Kate Daly, from Sydney, was left heart-broken after she learnt both her twins, William and Emmaline, (pictured)  had been affected by cytomegalovirus (CMV)

Kate Daly, from Sydney, was left heart-broken after she learnt both her twins, William and Emmaline, (pictured)  had been affected by cytomegalovirus (CMV)

William (left) was diagnosed with significant hearing loss which was due to him contracting congenital CMV, his twin sister Emmaline (right) has since developed a learning disability

William (left) was diagnosed with significant hearing loss which was due to him contracting congenital CMV, his twin sister Emmaline (right) has since developed a learning disability

While most babies with CMV will grow up without any effects, about 400 will develop disabilities including deafness, blindness, microcephaly (where the brain doesn't develop properly, resulting in a smaller than usual head) and epilepsy.  

Mrs Daly learnt of the devastation the virus can have when she was told her twins had been affected.

After delivering her twins by caesarean at 37 weeks, Mrs Daly was delighted when she was told all appeared perfectly fine with their health. 

But things dramatically turned when they both failed their newborn hearing scans and the CMV virus was first brought to her attention.

William, now 8, has since developed mild cerebral palsy and later diagnosed with severe intellectual disability and autism

William, now 8, has since developed mild cerebral palsy and later diagnosed with severe intellectual disability and autism

Left shocked that she hadn't been told about the precautions she could have taken to help prevent the virus, Mrs Daly (left with son Will) now dedicates her life to highlighting the little-known virus

Left shocked that she hadn't been told about the precautions she could have taken to help prevent the virus, Mrs Daly (left with son Will) now dedicates her life to highlighting the little-known virus 

'The first time CMV had ever been mentioned to me was when the audiologists asked if we'd like to test William for it,' she told Daily Mail Australia.

 

'William then had a blood test and a urine test which confirmed that he had CMV. At this stage they still weren't 100 per cent sure whether William had contracted CMV before or after birth but later he was given a CT scan to check his cochlear and they found that their were calcification deposits on William's brain.'

'The infectious disease specialist was then able to confirm that the cause of William's hearing loss was congenital CMV.'

Having never heard of the disease, Mrs Daly desperately searched for answers.

'Before getting the results for the urine test I had Googled CMV and learnt very quickly the devastating impact CMV can have on babies,' she said.

'I was then told the results over the phone while at home by myself with the

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