A surge in cancer and neurological cases in north-eastern Tasmania since 2002 is consistent with chronic low-level chemical exposure, says a report to be submitted to the federal Australian Medical Association next month, says The Sunday Age.

Says the newspaper:

The Tasmanian AMA has charted the rise for the first time and wants expert opinion from the AMA’s public health committee. The report says Tasmania has health anomalies including a sudden jump in childhood cancers and higher-than-average premature births. It says cases documented around St Helens, on the east coast, in particular are symptomatic of possible chemical exposure.

The report says a rise in neurological illnesses, reproductive and gastrointestinal cancers around St Helens is statistically significant over and above what might be expected through population increases alone. The rise coincides with the expansion of timber plantations in the catchment that supplies drinking water.

Plantations are sprayed with chemicals during establishment to kill weeds and grasses. The local Break O’Day Council, helicopter operators, the Health Department and the Department of Primary Industries, Water and Environment have identified at least a dozen herbicides in use or detected around St Helens since 2002. Many are known or possible carcinogens or hormone disrupters.

Other excerpts:

The Tasmanian AMA president, Launceston-based Dr Michael Aizen, said the Government response in investigating chemical use and testing water was inadequate, and data available was limited. He wanted more robust, transparent water testing that correlated with when, where and what chemicals were applied.

Stan Siejka, northern Tasmania’s only neurologist, said that in the past year he had treated several patients with unexplained neurological symptoms and definite exposure to chemical spraying. In a typical case, a worker showed classic symptoms after a field nearby was sprayed, but his employer called Dr Siejka to claim the worker had not been exposed.

And the article concludes:

Alison Bleaney, the St Helens general practitioner who alerted health authorities to apparent anomalies in illness rates, said the council and other agencies were using methods to detect individual chemicals and bacteria, rather than testing whether the water itself was toxic and then investigating possible causes.

The full story:

Doctors fear chemical link to child disease
And:
River water tests add to disease concerns, Sunday Age, Feb 6

And, Simon Bevilacqua, The Sunday Tasmanian:

West and North-West coast devils are relatively, although not markedly, different genetically from cousins further east. Genetic variation may help protect.

Another theory is that devils’ immune systems are compromised.

Dozens of studies worldwide have suggested long-term exposure to herbicides, pesticides and synthetic chemicals can disrupt immune systems.

The devil disease has erupted at a time of extensive land clearance and chemical use by the Tasmanian logging industry.

The Devil Disease Project is embarking on a pilot program to find whether chemical use is linked with the disease. The team will test devils for the existence of 1080, atrazine and other commonly used poisons.

Devils are known colloquially as “Nature’s Garbo”. They eat dead animals – roadkill, sheep, possums, wallabies. Their diet must be consistently laced with poisons. Almost 100,000 native animals were killed by 1080 in Tasmania in the 2003-04 financial year.

Perhaps half a million native animals, mostly Bennetts and Rufous wallabies and brushtail possums, have been killed by 1080 since 1997-98.

Studies show the poison in a wallaby carcass is not enough to kill devils. But the long-term impact of a diet laced with poisons is less well known.

Testing for effects of chronic exposure to herbicides, pesticides and synthetic chemicals is extremely difficult. Even if the Devil Disease Project finds evidence of poisons in devils it is far from a causal link to cancer. Devils are likely to have been exposed to a chemical cocktail over the past quarter of a century.

And,

Which chemical is a cause or a trigger would be open to question.

For two decades some scientists have suspected a link between herbicides and pesticides and disease like non-Hodgkin’s lymphoma and prostate cancer.

Many studies have found worrying associations but fall short of a link.

And,

Latest theories suggest chemical cocktails operate to first suppress the immune system and then introduce the cancer.

The full story:

Between Devil and deep blue sea