Yet another problem facing New Zealand beekeepers is the discovery of a new pathogen, Lotmaria passim, in hives from the Coromandel. The following is the text of a press release:
A Gisborne company, dnature diagnostics & research Ltd, developed the new diagnostics tests that were used to discover the presence of Lotmaria passim in New Zealand. The company is at pains to point out however that the new detection does not necessarily mean a new incursion, it may have quietly existed while no-one was looking for it.
However, L. passim – a trypanosome (a small single cell parasitic organism with corkscrew movements) – has been associated with overseas hive deaths especially in conjunction with Nosema ceranae – a fungal-like gut organism in honeybees – that has been in New Zealand since at least 2010 when it was first detected. L. passim scars the gut of the bees possibly allowing better colonisation of the Nosema ceranae.
Dnature has also recently discovered a number of areas in NZ have seen extraordinarily high levels of the two Nosema species in honeybees: Nosema ceranae and Nosema apis; the combination of which has been shown to markedly decrease bee lifespan and affect their homing ability. In short, the bees go out to forage and don’t find their way back to the hive and are dying at a younger age.
However as these agents were also found in hives that did not appear to be in poor health, additional tests were developed by dnature for organisms known as trypanosomes. Two were known in honeybees: Crithidia mellificae (since 1967) and Lotmaria passim (January this year) and had been described as showing worse effects when together with Nosema ceranae. Prompted by the new report and with the encouragement of the affected beekeeper scientist in Coromandel, John Mackay (technical director of dnature) designed new quantitative DNA tests to detect the presence of both species. Upon finding positives a second novel test was used to confirm that the positives were the more prevalent species worldwide: Lotmaria passim.
At the same time, samples from around the North Island were tested along with samples going back to 2012. Lotmaria passim was found in a number of them indicating that the pathogen was more widespread than the Coromandel and had been here for several years at least.
What does it mean? In essence, too early to tell. More testing from different areas is required along with repeated sampling from sites over the course of a beekeeping season. The organism has only been described and named since January this year and so very little is known about it. But the rapid and quantitative tests developed by dnature will go some way to helping answer the questions arising.
Dnature has been DNA testing a suite of bee viruses, including nosema species for several years. These tests, along with Lotmaria passim, are available from dnature and can be supplied in a kit format for other laboratories for testing.
For general information, please contact: Belinda Mackay – General Manager mob 021 415 100
For technical information, please contact: John Mackay – Technical Director mob 027 362 8873
The Beekeepers’ Association would like beekeepers to monitor their hives for symptoms of disease and report them to assist tracking of the prevalence of this pathogen.
Dnature are offering free tests for L. passim alongside all Nosema tests.