Journal•ISSN: 0048-0169
New Zealand Veterinary Journal
Taylor & Francis
About: New Zealand Veterinary Journal is an academic journal published by Taylor & Francis. The journal publishes majorly in the area(s): Population & Dairy cattle. It has an ISSN identifier of 0048-0169. Over the lifetime, 4056 publications have been published receiving 56298 citations. The journal is also known as: NZVJ & NZ vet journal.
Topics: Population, Dairy cattle, Mastitis, Medicine, Virus
Papers published on a yearly basis
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TL;DR: Six out of 18 preventive measures were shown to have a positive nett benefit, viz blanket use of dry-cow therapy, keeping cows standing after Milking, back-flushing of the milk cluster after milking a cow with clinical mastitis, application of a treatment protocol, washing dirty udders, and the use of milkers' gloves.
Abstract: Good udder health is not only important for the dairy farmer but, because of increasing interest of consumers in the way dairy products are produced, also for the dairy production chain as a whole. An important role of veterinarians is in advising on production diseases such as mastitis. A large part of this advice is given around the planning of management to maintain or improve the udder health status of a farm. Mastitis is a costly disease, due to losses (a reduction of output due to mastitis) and expenditure (additional inputs to reduce the level of mastitis). Worldwide, published estimates of the economic losses of clinical mastitis range from €61 to €97 per cow on a farm, with large differences between farms, e.g. in The Netherlands, losses due to clinical and subclinical mastitis varied between €17 and €198 per cow per year. Moreover, farmers tended to underestimate these costs. This indicates that for a large proportion of farms there are many avoidable losses. In order to provide good support to farmers' decision-making, it is important to describe the mastitis setting not only in terms of disease, e.g. incidence of clinical mastitis, but also in monetary terms; and to make good decisions, it is necessary to provide the dairy farmer with information on the additional expenditure and reduced losses associated with alternative decisions. Six out of 18 preventive measures were shown to have a positive nett benefit, viz blanket use of dry-cow therapy, keeping cows standing after milking, back-flushing of the milk cluster after milking a cow with clinical mastitis, application of a treatment protocol, washing dirty udders, and the use of milkers' gloves. For those measures that included a large amount of routine labour or investment, the reduced losses did not outweigh the additional expenditure. The advisor cannot expect that measures that are cost-effective are always implemented. Reasons for this are the objectives of the dairy farmer can be other than maximisation of profit, resources to improve the mastitis situation compete with other fields of management, risk involved with the decision, economic behaviour of the dairy farmer, and valuation of the cost factors by the dairy farmer. For all decision-makers this means that, although financial incentives do have an effect on the management of mastitis, it is not always sufficient to show the economic benefits of improved management to induce an improvement of management of mastitis.
417 citations
TL;DR: Several groups of fungi produce tremorgens which, when injected into sheep, produce symptoms similar to those in field outbreaks of RGS, but under field conditions, populations of these fungi have not been shown to differ significantly between toxic and non-toxic pasture.
Abstract: Sir, — In recent years, much research effort has been directed towards identifying the cause of Ryegrass staggers (RGS). Many promising leads have been investigated, including studies of fungi in soil, ryegrass leaves, and dead leaf litter that could produce tremorgenic mycotoxins(3). Several groups of fungi produce tremorgens(4) which, when injected into sheep, produce symptoms similar to those in field outbreaks of RGS. However, under field conditions, populations of these fungi have not been shown to differ significantly between toxic and non-toxic pasture(7) (McKenzie & Byford, unpublished data).
304 citations
TL;DR: Two potent neurotoxins are isolated from herbage collected from pastures on which the disease of livestock known as ldryegrass staggers rd(8)(11) occurred and appear to be new compounds not previously reported.
Abstract: Sir, — We wish to report the isolation of two potent neurotoxins from herbage collected from pastures on which the disease of livestock known as ldryegrass staggers rd(8)(11) occurred. These neurotoxins have been partially characterised by their mass spectral properties (see below) and appear to be new compounds not previously reported. We propose the general name lolitrems for the neurotoxins, based on their association with ryegrass (Lolium perenne L.) and on their ability to produce tremors in animals, and name the isolated compounds lolitrem A and lolitrem B.
222 citations
TL;DR: Over the years, one of the criticisms of Muller & Kirk’s Small Animal Dermatology was that there weren’t enough clinical photos, especially in colour.
Abstract: It is here The long anticipated 7th Edition of Muller & Kirk's Small Animal Dermatology has arrived, 12 years after the 6th edition It was worth the wait This almost entirely new book has new pu
175 citations
TL;DR: Interest in the biology of selenium was focused on its properties as a naturally-occurring poison in plants grazed by stock in certain problem areas, notably in the western states of North America, and those aspects will not be considered further in this review.
Abstract: Extract Until recently, interest in the biology of selenium was focused on its properties as a naturally-occurring poison in plants grazed by stock in certain problem areas, notably in the western states of North America. The geological distribution of soils bearing seleniferous vegetation, the toxicities of various forms of selenium, including those of its inorganic salts, and the treatment and prevention of selenium poisoning have been dealt with in detail by Rosenfeld and Beath (1964), and those aspects will not be considered further in this review.
169 citations