John Larsen

Factors associated with small lungworm infections in heavily infected sheep in southeast South Australia

JE Hanks, JWA Larsen, AJD Campbell

Journal article  |  2021  |  AUSTRALIAN VETERINARY JOURNAL

This field observational study describes the seasonal pattern of small lungworm infections under different grazing managements fro..

The effects of parasitism on ewes for prime lamb production in western Victoria

B Kirk, JWA Larsen, N Anderson, MA Stevenson

Journal article  |  2021  |  ANIMAL PRODUCTION SCIENCE

Context: Internal parasites are estimated to cost the Australian sheep industry AUD436 million per annum (p.a.). Aims: To assess t..

Severity and prevalence of small lungworm infection on three South Australian farms and associations with sheep carcass characteristics

Jenny E Hanks, Angus JD Campbell, John WA Larsen

Journal article  |  2021  |  VETERINARY PARASITOLOGY

This field and abattoir study assessed the association of the severity and prevalence of small lungworm lesions with the carcass c..

The effect of pasture molluscicide on small lungworm infections and the productivity of grazing lambs

Jenny E Hanks, John WA Larsen, Angus JD Campbell

Journal article  |  2021  |  VETERINARY PARASITOLOGY

The aim of this study was to assess the effect of pasture molluscicide treatment on the prevalence and severity of small lungworm ..

Using farmer observations for animal health syndromic surveillance: Participation and performance of an online enhanced passive surveillance system

Caitlin Pfeiffer, Mark Stevenson, Simon Firestone, John Larsen, Angus Campbell

Journal article  |  2021  |  PREVENTIVE VETERINARY MEDICINE

The challenge of animal health surveillance is to provide the information necessary to appropriately inform disease prevention and..

Diarrhoea associated with gastrointestinal parasites in grazing sheep

Caroline Jacobson, John WA Larsen, R Brown Besier, Joan B Lloyd, Lewis P Kahn

Journal article  |  2020  |  VETERINARY PARASITOLOGY

Diarrhoea is a common, widespread and frustrating reality for sheep enterprises in most sheep producing regions globally and of pa..

Assessment of the efficacy of an autogenous vaccine against Yersinia pseudotuberculosis in young Merino sheep

KJ Stanger, H McGregor, M Marenda, JM Morton, JWA Larsen

Journal article  |  2019  |  NEW ZEALAND VETERINARY JOURNAL

AIMS To assess the efficacy of an autogenous vaccine against Yersinia pseudotuberculosis III in preventing clinical disease and de..

Outbreaks of diarrhoea ("winter scours') in weaned Merino sheep in south-eastern Australia

KJ Stanger, H McGregor, JWA Larsen

Journal article  |  2018  |  AUSTRALIAN VETERINARY JOURNAL

OBJECTIVE: Identify the cause of outbreaks of diarrhoea during winter that are not attributable to gastrointestinal nematodes in w..

A longitudinal study of faecal shedding of Yersinia enterocolitica and Yersinia pseudotuberculosis by Merino lambs in south-eastern Australia

KJ Stanger, H McGregor, M Marenda, JM Morton, JWA Larsen

Journal article  |  2018  |  PREVENTIVE VETERINARY MEDICINE

A prospective longitudinal study was conducted to investigate potential risk factors for faecal shedding of Yersinia enterocolitic..

An automated, multiplex-tandem PCR platform for the diagnosis of gastrointestinal nematode infections in cattle: An Australian-European validation study

Florian Roeber, Ebrahim Bani Hassan, Philip Skuce, Alison Morrison, Edwin Claerebout, Stijn Casaert, David R Homer, Simon Fireston, Mark Stevenson, Lee Smith, John Larsen

Journal article  |  2017  |  VETERINARY PARASITOLOGY

Detecting the genera and species of gastrointestinal (GI) nematode infections in faecal samples obtained from cattle requires the ..