Monitoring an epidemic of Theileria-associated bovine anaemia (Ikeda) in cattle herds in New Zealand

McFadden, Andrew; Vink, Daan; Pulford, David; Lawrence, K.E.; Gias, E; Heath, A. C. G.; McFadden, Caitlyn; Bingham, Paul

doi:10.1016/j.prevetmed.2015.11.005

Cited by 16 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Asia, ALT transmits numerous pathogens, including severe fever with thrombocytopenia syndrome (SFTS) virus, which has a case fatality rate of up to 30% in humans (Yu et al, 2011). This tick commonly infests livestock in its native and introduced ranges, where it is a vector of pathogens, such as Theileria spp., and where intense infestations can lead to production losses and deaths (Dicker, 1978;Heath, 2016;McFadden et al, 2016;Neilson & Mossman, 1982). This concern is highlighted by the recent detection of Theileria orientalis Ikeda subtype associated with cattle mortalities in Virginia (Oakes et al, 2019) and ALT-induced exsanguination of heavily infested cattle in North Concurrently, we conducted surveillance for ALT on wildlife hosts and in the environment on a Virginia cattle farm, following the detection of T. orientalis Ikeda strain, which was associated with cattle mortalities (Oakes et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Surveys for ticks on wildlife hosts and in the environment at Asian longhorned tick (Haemaphysalis longicornis)‐positive sites in Virginia and New Jersey, 2018

White

Bevins

Ruder

et al. 2020

Transbounding Emerging Dis

View full text Add to dashboard Cite

Haemaphysalis longicornis, the Asian longhorned tick (ALT), is native to eastern Asia, but it has become invasive in several countries, including Australia, New Zealand and recently in the eastern United States (US). To identify wild mammal and avian host species in the US, we conducted active wildlife surveillance in two states with known ALT infestations (Virginia and New Jersey). In addition, we conducted environmental surveys in both states. These surveillance efforts resulted in detection of 51 ALTinfested individuals from seven wildlife species, including raccoon (Procyon lotor), Virginia opossum (Didelphis virginiana), red fox (Vulpes vulpes), woodchuck (Marmota monax), eastern cottontail (Sylvilagus floridanus), striped skunk (Mephitis mephitis) and white-tailed deer (Odocoileus virginianus). We found ALT in the environment in both states and also collected three native tick species (Amblyomma americanum, Dermacentor variablis and Ixodes scapularis) that are vectors of pathogens of public health and veterinary importance. This study provides important specific information on the wildlife host range of ALT in the US.

show abstract

Section: Introductionmentioning

confidence: 99%

Surveys for ticks on wildlife hosts and in the environment at Asian longhorned tick (Haemaphysalis longicornis)‐positive sites in Virginia and New Jersey, 2018

White

Bevins

Ruder

et al. 2020

Transbounding Emerging Dis

View full text Add to dashboard Cite

show abstract

“…Haemaphysalis spp. ticks are the primary biological vector of T. orientalis ( 6 ) and are believed to be essential for completion of the T. orientalis life cycle ( 7 ), although there is limited evidence suggesting that transmission might occur through flies, lice, or vaccine needles ( 1 ).…”

mentioning

confidence: 99%

Theileria orientalis Ikeda Genotype in Cattle, Virginia, USA

Oakes¹,

Yabsley²,

Schwartz³

et al. 2019

Emerg. Infect. Dis.

View full text Add to dashboard Cite

Theileria orientalis Ikeda genotype is a parasite that causes a disease in cattle that results in major economic issues in Asia, New Zealand, and Australia. The parasite is transmitted by Haemaphysalis longicornis ticks, which have recently been reported in numerous states throughout the eastern United States. Concurrently, cattle in Virginia showed clinical signs consistent with a hemoprotozoan infection. We used amplicons specific for the major piroplasm surface protein and small subunit rDNA of piroplasms to test blood samples from the cattle by PCR. Bidirectional Sanger sequencing showed sequences with 100% identity with T. orientalis Ikeda genotype 2 sequences. We detected the parasite in 3 unrelated herds and from various animals sampled at 2 time points. Although other benign T. orientalis genotypes are endemic to the United States, detection of T. orientalis Ikeda genotype might represent a risk for the cattle industry in Virginia.

show abstract

“…The epidemic curve constructed using these data (Figure 1), showed a pattern of seasonal peaks occurring in the spring and autumn; with the spring peak being the greatest [4]. Descriptive data collected by MPI allowed the epidemic curve to be categorised by age, (calf less than 6 months of age or adult), and by farm type, (dry stock, dairy, or beef).…”

Section: The New Zealand Epidemicmentioning

confidence: 99%

“…"Moving day" 2014 achieved a further rapid acceleration of case farms (Figure 2). However, during the whole period that MPI records were kept (22 August 2012 to 20 November 2014) only one PCR positive farm was identified in the South Island, and this was not until late 2014 [4]. Following this initial case, TABA then became more common and was regularly diagnosed in the Golden Bay area at the northern tip of the South Island by 2018 [6].…”

Section: The New Zealand Epidemicmentioning

confidence: 99%

See 1 more Smart Citation

Review of the New Zealand Theileria orientalis Ikeda Type Epidemic and Epidemiological Research since 2012

et al. 2021

View full text Add to dashboard Cite

This article sets out to document and summarise the New Zealand epidemic and the epidemiological research conducted on the epizootic of bovine anaemia associated with Theileria orientalis Ikeda-type infection, which began in New Zealand in August 2012. As New Zealand has no other pathogenic tick-borne cattle haemoparasites, the effects of the T. orientalis Ikeda-type infection observed in affected herds and individual animals were not confounded by other concurrent haemoparasite infections, as was possibly the case in other countries. This has resulted in an unbiased perspective of a new disease. In addition, as both New Zealand’s beef and dairy cattle systems are seasonally based, this has led to a different epidemiological presentation than that reported by almost all other affected countries. Having verified the establishment of a new disease and identified the associated pathogen, the remaining key requirements of an epidemiological investigation, for a disease affecting production animals, are to describe how the disease spreads, describe the likely impacts of that disease at the individual and herd level and explore methods of disease control or mitigation.

show abstract

Monitoring an epidemic of Theileria-associated bovine anaemia (Ikeda) in cattle herds in New Zealand

Cited by 16 publications

References 17 publications

Surveys for ticks on wildlife hosts and in the environment at Asian longhorned tick (Haemaphysalis longicornis)‐positive sites in Virginia and New Jersey, 2018

Surveys for ticks on wildlife hosts and in the environment at Asian longhorned tick (Haemaphysalis longicornis)‐positive sites in Virginia and New Jersey, 2018

Theileria orientalis Ikeda Genotype in Cattle, Virginia, USA

Review of the New Zealand Theileria orientalis Ikeda Type Epidemic and Epidemiological Research since 2012

Contact Info

Product

Resources

About