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The flawed interpretation of the Westmead study that NSW Health states is the proof Lyme disease  is not here - see fact sheet below

Lyme Disease Australia

NSW Health quotes a study done on over 12000 ticks as their justification for not recognising Lyme disease here in Australia.

Firstly here is the scientific paper itself published in 1994  http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2271457/pdf/epidinfect00044-0139.pdf

If you go to the trouble of reading this you will find the following statements are true (if you are kind enough to believe what I say here instead of wading through it then your trust will not be abused)

The study states:

Over 12000 ticks were collected in coastal regions from the Queensland Border to the Victorian border in all seasons over a three year period. These were dissected for the MID GUT CONTENTS and these were analysed by microscopy and serological tests for the Borrelia spirochaete. All ticks collected had not had a blood meal. 
But a study released in January 2012

Of ticks, mice and men: understanding the dual-host lifestyle of Lyme disease spirochaetes

demonstrates that the spirochete in the unfed gut is in a poorly understood dormant state - difficult to detect would also be an appropriate description. The serology was directed against only OspA OspB and flagellin proteins (thus missing several that a  Western Blot detects).

1038 ticks were examined by PCR. 
Of these 1038 ticks only 570 were Ixodes Holocyclus (that's the common Eastern Coast paralysis tick that represents the great majority of human tick bites.
SLO 's were noted (Spirochaete like objects) and though to be "contaminants"
and the study's discussion states at its conclusion a better marker is needed to elucidate the enigma viz:

Confirmation of clinically suspected cases of Lyme disease in Australia, based on
positive serology from IFAT and ELISA, should thus continue to be questioned.
Unfortunately, a 'more sophisticated' technique such as Western immunoblot
testing may be no more helpful because of the lack of specificity of protein
'markers' such as the 41 kDa flagella protein and the outer surface proteins (such
as OspA) which are known to be heterogeneous in North American and European
borrelia [32-35]. Until more specific markers are defined for a causative agent for
the Australian syndrome, preferably following isolation and characterization of an
organism from a local patient, the exact nature of 'Lyme disease' in Australia will
remain an enigma.

Is NSW health speaking for all Australia? Take a look at this map showing the distribution of this tick on this continent http://en.wikipedia.org/wiki/File:Ixodes_holocyclus_distribtion_map.png then review the new data from Dr Mayne's paper Evidence for Ixodes holocyclus (Acarina: Ixodidae) as a Vector for Human Lyme Borreliosis Infection in Australia

Does NSW health even want to have a policy to cover those who contract Lyme disease overseas? The clear answer to this at this stage remains NO as no advice is given on their fact sheet: 

Their current fact sheet is at http://www.health.nsw.gov.au/Infectious/factsheets/Pages/Lyme_disease.aspx

 

Finally it is stated in the fact sheet that there is no spread from person to person. 
The facts say otherwise:

Firstly it looks like it can be spread as an STD - refer to Culture and identification of Borrelia spirochetes in human vaginal and seminal secretions [v1; ref status: awaiting peer review, http://f1000r.es/4rm]
available at http://f1000research.com/articles/3-309/v1

Secondly here is a long list of references to vertical transmission (thats in utero) from Pubmed firstly then others after number 22, see page on Vertical and Sexual transmission of Lyme disease