scholarly journals A longitudinal study of infection with genotypes of Theileria orientalis in calves and introduced cattle at Dorrigo, New South Wales, and the effect on weight gains

2021 ◽  
pp. 109487
Author(s):  
David Emery ◽  
Shaojing Wang ◽  
Chantelle Loo ◽  
Chris Shirley
2021 ◽  
Vol 12 (2) ◽  
pp. 101645
Author(s):  
Biniam T. Lakew ◽  
Sarbast K. Kheravii ◽  
Shu-Biao Wu ◽  
Steve Eastwood ◽  
Nigel R. Andrew ◽  
...  

2013 ◽  
Vol 196 (1-2) ◽  
pp. 96-105 ◽  
Author(s):  
Graeme J. Eamens ◽  
Graham Bailey ◽  
Cheryl Jenkins ◽  
Jocelyn R. Gonsalves

2005 ◽  
Vol 29 (5) ◽  
pp. 429-435 ◽  
Author(s):  
Patricia Kenny ◽  
Emily Lancsar ◽  
Jane Hall ◽  
Madeleine King ◽  
Meredyth Chaplin

2021 ◽  
Author(s):  
Katherine B Owen ◽  
Bridget C Foley ◽  
Rochelle Eime ◽  
Catriona Rose ◽  
Lindsey J Reece

Abstract Background Sports have a focus on increasing participation, which contributes to increasing population levels of physical activity, social cohesion and longevity of the sport. The primary aim of this study was to examine reasons for drop-out of a popular team sport in Australia, Field Hockey and identify opportunities to increase participation. Methods This longitudinal study obtained routinely collected registered player data from Hockey New South Wales over two consecutive years, and survey data from registered players who dropped out. Logistic regression models identified demographic subgroups who were more likely to drop out of sport, and the reasons for dropping out. Results In 2018, 8,463 (31%) of hockey players did not return to play hockey after the previous season and 805 (10%) of these completed a survey. Specific groups who were more likely to stop playing included 5–6 years (OR: 2.1, 95% CIs 1.8, 2.6; reference: 12–17 years), females (OR: 1.1, 95% CIs 1.3, 1.2; reference: males), Indigenous (OR: 1.2, 95% CIs 1.1, 1.4; reference: non-indigenous), most disadvantaged (OR: 1.1, 95% CIs 1.0, 1.2; reference: least disadvantaged) or regional and remote (1.1, 95% CIs 1.0, 1.2; reference: major cities). Top reasons for drop out were; medical/age (17%), change in circumstances (16%) and high cost (13%), lack of time (13%) and lack of enjoyment (7%). Conclusions This research makes recommendations to sport on how to reduce dropout and specifically amongst 5–6 year olds, females, Indigenous, disadvantaged and regional or remote areas through enjoyable flexible, modifiable versions of the game.


2017 ◽  
Vol 95 (6) ◽  
pp. 211-216 ◽  
Author(s):  
E Swilks ◽  
C Jenkins ◽  
A Poynting ◽  
D Collins ◽  
GL Krebs

2016 ◽  
Vol 13 (3) ◽  
pp. 160-171 ◽  
Author(s):  
Paula Cronin ◽  
Brent Kirkbride ◽  
Albert Bang ◽  
Bonny Parkinson ◽  
David Smith ◽  
...  

2020 ◽  
Author(s):  
David Emery ◽  
Shaojing Wang ◽  
Chantelle Loo ◽  
Chris Shirley

Abstract Background: In regions with endemic Theileria orientalis, recovered cattle are carriers, leaving newborn calves and introduced stock as the most susceptible groups to develop clinical disease after tick infestation. Methods: To gain information on the kinetics of infestation and development and effects of parasitosis by virulent Theilerial genotypes ikeda and chitose and the “benign” genotype, buffeli, this study sampled at total of 150 calves from 3 farms in Dorrigo, Australia, a region with multiple genotypes of the parasite. In addition, 30 introduced beef weaners were bled and weighed for 6 months after arrival. Results: In both cohorts, parasitosis with the T.orientalis ikeda and chitose (genotypes 1 & 2) occurred within 3-4 weeks in >95% of the groups, with maximal gene copies generated around 5-7 weeks after birth or introduction, before declining. In contrast, parasitosis with T.orientalis buffeli (genotype 3), increased slowly, with around 80% of the population testing positive by PCR after 4 months. The parasitosis with the buffeli genotype did not exceed 40000 gene copies /ul and was similar to those exhibited by ikeda and chitose genotypes following the “first wave of parasitaemia” as cattle entered the carrier state. In the 30 introduced weaners, the early parasitosis with T.orientalis ikeda and chitose also caused significant reductions in haematocrit and incurred around 20Kg loss in weight gain; the latter had not been recovered by 6 months after introduction. Conclusions: The results support previous findings in other endemic regions of Theileriosis, but imply that amelioration of the early high levels of parasitosis by the virulent genotypes could reduce the initial impact of Theileriosis on production, which appears much less affected once animals enter the carrier state.


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