Ongoing Incidents

For information on health incidents involving wildlife in your state or territory contact your WHA Coordinator. 
     

Rotavirus mortalities of pigeons

  
Since mid-2016, high levels of mortalities in kept pigeons (racing and fancy) have occurred in lofts across some states of Australia (Western Australia, Victoria, New South Wales, South Australia). Clinical signs in affected birds have included depression, vomiting, diarrhoea, regurgitation and hunched postures. Birds that appeared sick usually died within 12 to 24 hours. A rotavirus (a member of the reoviridae family) was confirmed.

Feral pigeons are likely to be susceptible to the virus. In Western Australia, feral pigeon (rock pigeon; Columba livia) mortalities occurred in a location close to an affected loft, with gross and histological findings consistent with the disease in the racing and fancy pigeons. In addition, rotavirus has been detected in faecal samples of several feral and native wild bird species overseas. 

For further information developed in consultation with relevant State, Territory, Commonwealth Government agencies and Wildlife Health Australia, please see the summary document below.

Information on Rotavirus mortalities of pigeons Feb 2017 

Please be alert to any signs of disease that are unusual or clusters of deaths in wild birds (feral or native); please report incidents to your state or territory WHA Coordinator.

For more information see the following links:

NSW DPI - Pigeon rotavirus 

Agriculture Victoria - Rotavirus mortalities of pigeons 

DPIRD WA - Pigeon rotavirus in Western Australia 

McCowan C et al (2018) A novel group A rotavirus associated with acute illness and hepatic necrosis in pigeons (Columba livia), in Australia. PLoS ONE 13(9): e0203853.

Mortality event in flying-foxes

  
Spring/Summer 2016-17: From September 2016, there were reports of increased numbers of sick and orphaned flying-foxes, as well as adult mortalities, at camps distributed along the eastern seaboard of Australia. Primarily, there was evidence of abandonment and starvation in flying-fox pups. There were also reports of unusual behaviour in adult flying-foxes such as day roosting and flying and foraging in unusual areas. Although total numbers are not known, reports indicate many hundreds of animals affected.


Carer groups worked very hard to rescue and rehabilitate abandoned, sick and injured flying-foxes. 

A group was convened to monitor and explore the event, including representatives from the state government agriculture and environment agencies in affected jurisdictions, Wildlife Health Australia, the Australian Registry of Wildlife Health and the Department of Agriculture and Water Resources. Possible causes were considered, such as an acute food shortage and/or disease, but unfortunately no common underlying cause of the events could be found.

A report on the event is available here (V2 - updated November 2017).

If you have further information on this type of event, please contact the WHA Coordinator in your state or territory.

Members of the public should not handle flying-foxes due to the risk of exposure to diseases such as Australian bat lyssavirus. If you find a sick, injured or abandoned flying-fox, contact a licensed wildlife care organisation or local veterinarian.

Tularaemia

  

Tularaemia is an infection caused by the bacteria Francisella tularensis. It is commonly found in a range of wildlife species across the northern hemisphere but, until recently, was believed to be absent from Australian wildlife.

Different subspecies of tularaemia vary in their virulence. A single case of Francisella tularensis novicida was reported in a human in the Northern Territory in 2003. In 2011, two separate cases of F. t. holarctica biovar japonica were diagnosed in two women who had a history which included being scratched and/ or bitten by common ringtail possums in western Tasmania. Testing of a small number of possums from western Tasmania and other areas did not reveal evidence of tularaemia.

In September 2016, tularaemia was detected for the first time in Australian animals, following Next Generation molecular analysis of archived samples, collected from two separate clusters of common ringtail possum deaths that had occurred in NSW in 2002 and 2003. Findings of F. t. holarctica were confirmed by PCR and were found to be genomically very similar to that found in the 2011 Australian human cases. For more information see the following links:

NSW DPI - Tularaemia 

WHA Fact Sheet - Tularaemia and Australian wildlife

National Guidelines for Sample Submission – Tularaemia – Diagnostic Testing

Zika virus

  

Zika virus is a viral disease spread by mosquitoes. It first appeared in 1947 in Africa, originating from non human primates. In humans it has caused sporadic disease in tropical areas inhabited by the mosquito vector (Aedes aegypti). In recent times, outbreaks of the disease have been seen in the Pacific and now in Brazil and other countries of South America. In humans, most infections are asymptomatic but around 20% of people may develop mild and short lived clinical signs. Recently Zika virus infection in humans has been linked to auto-immune disease and microcephaly in babies. Only a handful of imported cases have been reported in humans in Australia, although the vector mosquito occurs in parts of Queensland. There is no evidence that Australian wildlife are involved in the epidemiology of Zika virus. For more information see the following links:

Department of Health - Zika Factsheet - the Basics 

Queensland Health - Zika virus 

Centers for Disease Control and Prevention [USA] - Zika Virus 

Bellinger River turtle mortality

  

A severe mortality event involving Bellinger River Snapping Turtles (Myuchelys georgesi) was investigated after dead and dying turtles were reported in February 2015. Over 430 turtles are estimated to have been affected with clinical signs including swollen eyes, blindness, emaciation, clear nasal discharge and hind limb paresis, and a very high case fatality rate. Diagnostic investigation was conducted by multiple agencies and organisations. A wide range of potential infectious aetiologies were excluded by laboratory testing and no evidence of pesticides was found in river water samples.

A novel nidovirus was identified as the likely cause of these mortalities (Zhang et al 2018). M. georgesi is a unique species of freshwater turtle found only in small sections of the Bellinger and Kalang rivers and total numbers are estimated to be  extremely low. A small number of healthy M. georgesi were therefore removed from the river for a captive breeding program, and have remained healthy.

[This is a summary of the report in Animal Health Surveillance Quarterly, Volume 20, Issue 3]

Related links:

NSW DPI – Bellinger River Snapping Turtle Response 

Bellingen Shire Council – Bellinger River Snapping Turtles – Latest News 

Zhang J et al (2018) Identification of a novel nidovirus as a potential cause of large-scale mortalities in the endangered Bellinger River snapping turtle (Myuchelys georgesi). PLoS ONE 13(10): e0205209.

Spencer RJ et al (2018) Profiling a possible rapid extinction event in a long-lived species. Biological Conservation, 221, 190-197

Australian bat lyssavirus in juvenile bats

  

One adult and three juvenile grey-headed flying foxes rescued from a NSW Central Coast flying fox roost on 9 November 2015 have tested positive for Australian bat lyssavirus. A NSW CVO Bulletin to Wildlife Carers has been issued.

Additional information for NSW can be found at the end of the CVO Bulletin. Links to ABLV information in other jurisdictions are available on the WHA Resources (Expand 'Diseases and disease agents’ in the Categories list, select 'Australian Bat Lyssavirus’ and look for ‘Australian Bat Lyssavirus Resources’ for your state/territory).

Paramyxovirus in pigeons

  

Pigeon paramyxovirus (Avian Paramyxovirus 1) has been detected in loft pigeons and free-ranging feral pigeons in Victoria and NSW and domestic pigeons in Tasmania, Western Australia and South Australia. There are currently no reported unusual disease incidents in Australian commercial or backyard poultry flocks associated with this disease. Please be alert to any signs of disease that are unusual or clusters of deaths in wild birds; please report incidents to your state or territory WHA Coordinator.

Related links: 

NSW DPI - Pigeon paramyxovirus  and Veterinary testing  

Agriculture Victoria - Pigeon paramyxovirus - information for veterinarians 

DPIPWE Tasmania - Avian paramyxovirus in pigeons 

PIRSA South Australia - Pigeon paramyxovirus 

DPIRD Western Australia - Pigeon paramyxovirus 

DAF Queensland - Avian paramyxovirus in pigeons 

Kangaroo mortality events

  

Mass mortality and morbidity events involving kangaroos occur across a number of states and territories, in some cases with a seasonal occurrence. Investigation may reveal a primary cause, although these events are often multifactoral in nature. Examples include:

Plant toxicity – AHSQ Vol 19 Issue 2 & AHSQ Vol 20 Issue 4

Starvation – AHSQ Vol 20 Issue 3

Parasitism – AHSQ Vol 19 Issue 3

Other/unidentified causes – AHSQ Vol 15 Issue 2 & AHSQ Vol 19 Issue 1

WHA Fact Sheet - Mortalities of large macropods

Hendra virus

  

Information on Hendra virus incidents, on how to minimise the risk of horses becoming infected with Hendra virus and ongoing research into this virus are available from the following websites: 

NSW DPI - information on Hendra Virus 

Queensland DAF - information on Hendra Virus 

National Pest and Disease Outbreak website - Hendra Virus