Options
McGrath, Guy
Preferred name
McGrath, Guy
Official Name
McGrath, Guy
Research Output
Now showing 1 - 10 of 40
- PublicationThe Four Area Badger Study: a progress report, 1996 - 1999(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 2002-06)
; ; ; ; ; ; ; ; ; ; 43 - PublicationThe use of Geographical Information System (GIS) derived tessellations to relate badger territory to distribution patterns of soils and land use environmental habitat variables within the East Offaly badger research area(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 1998-09)
; 99 - PublicationSpatial analyst density analysis: a new approach to visualising the distribution of bovine tuberculosis using point locations for restricted herds in Co. Kerry, 1997(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 1999-09)
; ; ; ; ; 58 - PublicationA spatial and temporal analysis of Bovine Spongiform Encephalopathy in Irish cattle herds, 1996 - 2000(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 2002-06)
; ; ; ; ; ; 68 - PublicationThe Four Area Badger Study: a progress report, 1997(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 1998-09)
; ; ; ; 58 - PublicationSpatial and temporal distribution of bovine tuberculosis in badgers in Four Areas in Ireland: preliminary findings(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 2002-06)
; ; ; ; ; ; 50 - PublicationSpatial distribution of RFLP types identified in Mycobacterium bovis isolates from badgers and cattle in a study area in the Republic of Ireland(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 2000-10)
; ; ; ; ; ; ; ; 64 - PublicationPrevalence and distribution of exposure to Schmallenberg virus in Irish cattle during November 2012 to November 2013(BioMed Central, 2015-10-20)
; ; ; ; Background: Schmallenberg virus (SBV) was first identified in November 2011. It is a novel Orthobunyavirus (family Bunyaviridae) whose main ill effect is congenital malformation of the musculoskeletal and central nervous systems. It is borne by Culicoides spp., and has spread extensively in western Europe. The first case of SBV in Ireland was diagnosed in October 2012. It was anticipated that once the virus emerged in Ireland that there would be wide scale or nationwide spread over the course of the 2013 vector season. The objectives of this study were to determine the seroprevalence and distribution of exposure to Schmallenberg virus in Irish cattle from November 2012 to November 2013. Methods: Samples of brain for the pathology based surveillance were collected from malformed bovine and ovine foetuses submitted for post mortem examination. These samples were tested for SBV using RT-qPCR. Three serological surveys were carried out on sera submitted for the national brucellosis eradicartion programme. A spatial analysis of both sets of data was carried out. Results: Between October 2012 and 10th May 2013, SBV was confirmed by RT-qPCR in brain tissues from malformed foetuses obtained from 49 cattle herds and 30 sheep flocks in Ireland. In national serosurveys conducted between November 2012 until November 2013 the herd-level and animal-level SBV seroprevalences in cattle were 53 and 36 % respectively for the first survey, 51 and 35 % for the second survey and 53 and 33 % for the third survey. The herd level seroprevalence in counties ranged from 0 to 100 %, with the counties in the south and southeast having the highest seroprevalence (>50 %), the midlands a moderate herd level seroprevalence (10–50 %) while northern and north western counties had a low herd level seroprevalence (0–10 %). There was close spatial agreement between the results of the two different targeted surveillance strategies. Conclusions: At the end of the 2012 vector season, there was widespread exposure to SBV among herds in southern and south eastern Ireland. During 2013, there was little or no evidence of further outward spread, unlike the situation in several other European countries. Given the lack of evidence for circulation of the virus since 2012, it is likely that the younger age cohort in herds previously exposed to SBV and substantial proportions of animals of all ages on the margins of affected areas are immunologically naïve to SBV, and would be susceptible to infection if the virus were to re-emerge.174Scopus© Citations 11 - PublicationHerd-level factors associated with detection of calves persistently infected with bovine viral diarrhoea virus (BVDV) in Irish cattle herds with negative herd status (NHS) during 2017A compulsory national BVD eradication programme commenced in Ireland in 2013. Since then considerable progress has been made, with the animal-level prevalence of calves born persistently infected (PI) falling from 0.67 % in 2013 to 0.06 % in 2018. The herd-level prevalence fell from 11.3 % in 2013 to 1.1 % in 2018. In the Irish programme, herds in which all animals have a known negative status and which have not contained any PI animals for 12 months or more are assigned a negative herd status (NHS). While considerable progress towards eradication has been made, PI calves have been identified in a small proportion of herds that had previously been assigned NHS. Given this context, a case-control study was conducted to investigate potential risk factors associated with loss of NHS in 2017. 546 herds which had NHS on 1 January 2017 and lost that status during 2017 (case herds) were matched with 2191 herds (control herds) that retained their NHS status throughout 2017. Previous history of BVD infection, herd size, herd expansion, the purchase of cattle including potential Trojan cattle and the density of BVD infection within 10 km of the herd emerged as significant factors in a multivariable logistic regression model. This work adds to the evidence base in support of the BVD eradication programme, particularly establishing why BVD re-emerged in herds which had been free of BVD for at least the previous 12 months prior to the identification of a BVD positive calf. This information will be especially important in the context of identifying herds which may be more likely to contain BVD positive animals once the programme moves to herd-based serology status for trading purposes in the post-eradication phase.
105Scopus© Citations 7 - PublicationGeographical Information System (GIS) technology applied to a spatial/time study of tuberculosis restricted reactor herds in a sample area in Co. Carlow(University College Dublin. Centre for Veterinary Epidemiology and Risk Analysis, 1996-07)
; 46