"Scientists in Britain have developed a type of HIV test using a USB stick that can give a fast and highly accurate reading of how much virus is in a patients blood.  The device created by scientists at Imperial College London and the privatelyheld U.S. firm DNA Electronics uses a drop of blood to detect HIV then creates an electrical signal that can be read by a computer laptop or handheld device.  The researchers say the technology although still in the early stages could allow patients to regularly monitor their virus levels in a similar way to diabetes patients checking their blood sugar levels.  It could be particularly useful in remote settings to help HIV patients manage their treatment more effectively since current tests to detect virus levels take at least three days and involve sending a blood sample to a laboratory.  Monitoring viral load is crucial to the success of HIV treatment. At the moment testing often requires costly and complex equipment that can take a couple of days to produce a result said Graham Cooke who coled the research from the Imperials department of medicine.  We have taken the job done by this equipment which is the size of a large photocopier and shrunk it down to a USB chip.  The test which uses a mobile phone chip requires a drop of blood to be placed onto a spot on the USB stick. Any HIV in the sample triggers an acidity change which the chip transforms into an electrical signal. This is sent to the USB stick which shows the result on a computer or electronic device.  Published in the journal Scientific Reports results showed the stick test was  percent accurate over  blood samples and the average time to produce a reading was . minutes.  Some  million people worldwide are infected with the human deficiency virus HIV that causes AIDS and the majority of them live in subSaharan Africa.  Current AIDS drugs called antiretrovirals reduce virus levels in a patients blood to near zero.  But in some cases the drugs stop working  sometimes because virus has developed resistance to them  and the first sign of that would be a rise in a patients socalled viral load.  Virus levels cant be detected by routine HIV tests which can only show whether or not a person has the virus.  Editing by Raissa Kasolowsky Our StandardsThe Thomson Reuters Trust Principles httpthomsonreuters.comenaboutustrustprinciples.html"