article

Changes to cleaning practices could improve the health of calves on GB dairy farms, according to new research

Monday, 01 February 2021

A new study looking at colostrum hygiene on British dairy farms has shown that by making a few simple changes to cleaning protocols, farmers could significantly minimise the risk of disease in calves.

The study, published in Frontiers in Veterinary Medicine and led by experts from the School of Veterinary Medicine and Sciences at the University of Nottingham, is one of the first to look at colostrum hygiene in Great Britain.

Colostrum is the first milk produced after the delivery of a newborn, and is produced by humans, cows and other mammals before milk is released. It is very nutritious and contains high levels of antibodies, which are immune proteins essential to protect calves against infections.

Calves are born with zero immunity and rely entirely on colostrum to gain immunity against disease. It is essential that calves receive an adequate quantity of good quality colostrum as soon as possible after birth. High bacteria levels in colostrum can both increase the chances of calf scour and reduce the levels of immunity absorbed.

Several studies have provided estimates of colostrum hygiene at a national level, although to date this has not been conducted in Great Britain. In this new study, experts analysed data from 328 colostrum samples from 56 British dairy farms.

Samples collected from collection and feeding equipment had higher levels of bacteria than those collected directly from the cows’ teat, suggesting that whilst colostrum from the cow is relatively low in bacterial levels, improperly cleaned equipment can be a major source of bacterial contamination. Over one third of samples collected from collection or feeding equipment were over the threshold for high bacterial levels and represent a significant risk to the health of calves.

Dr Robert Hyde

Dr Robert Hyde, one of the researchers on the study, said: “By analysing colostrum collection protocols on the farms, we were able to identify a small number of management practices likely to have a substantial impact on colostrum hygiene for the majority of farms. For example, the use of scalding hot water to clean collection and feeding equipment could reduce bacteria levels by over 90% compared with using cold water only. Less than half of farms used scalding hot water to clean colostrum collection and feeding equipment, suggesting there are a large number of farms that could make this simple change.”

Key recommendations based on the research to reduce bacterial levels in colostrum suggest protocols should include the cleaning of colostrum collection and feeding equipment after every use with hot water as opposed to cold water, and hypochlorite or peracetic acid as opposed to water or parlour wash. Cows' teats should be prepared with a pre-milking teat disinfectant and wiped with a clean, dry paper towel prior to colostrum collection, and colostrum should be pasteurized where possible. The AHDB guide to colostrum hygiene can be found here.

This study provides a first look at bacteria levels in Great Britain, and the results suggest there are a few simple changes to collection and cleaning protocols that could have a significant impact on colostrum hygiene levels on British dairy farms. By making these simple changes there is likely to be significant improvement in colostrum hygiene, which is essential in minimising the risk of disease and ensuring the optimum health and welfare of calves on dairy farms.”
Dr Robert Hyde

The full study is open access and can be found here.

The University of Nottingham herd health toolkit contains a “Colostrum bacteriology” section, where vets and farmers can use the results from this study to see what management changes might have the largest impact on colostrum hygiene, can be found here.  

Story credits

More information is available from Dr Robert Hyde in the School of Veterinary Medicine and Sciences at the University of Nottingham at Robert.Hyde1@nottingham.ac.uk

Charlotte Anscombe - Media Relations Manager - Faculty of Medicine and Health Sciences
Email: charlotte.anscombe@nottingham.ac.uk
Phone: 0115 748 4417
Location:

Our academics can now be interviewed for broadcast via our Media Hub, which offers a Quicklink fixed camera and ISDN line facilities at Jubilee campus. For further information please contact a member of the Press Office on +44 (0)115 951 5798, email  pressoffice@nottingham.ac.uk

For up to the minute media alerts, follow us on Twitter

Notes to editors:

The University of Nottingham is a research-intensive university with a proud heritage. Studying at the University of Nottingham is a life-changing experience and we pride ourselves on unlocking the potential of our students. We have a pioneering spirit, expressed in the vision of our founder Sir Jesse Boot, which has seen us lead the way in establishing campuses in China and Malaysia - part of a globally connected network of education, research and industrial engagement. Ranked 103rd out of more than 1,000 institutions globally and 18th in the UK by the QS World University Rankings 2022, the University’s state-of-the-art facilities and inclusive and disability sport provision is reflected in its crowning as The Times and Sunday Times Good University Guide 2021 Sports University of the Year. We are ranked eighth for research power in the UK according to REF 2014. We have six beacons of research excellence helping to transform lives and change the world; we are also a major employer and industry partner - locally and globally. Alongside Nottingham Trent University, we lead the Universities for Nottingham initiative, a pioneering collaboration which brings together the combined strength and civic missions of Nottingham’s two world-class universities and is working with local communities and partners to aid recovery and renewal following the COVID-19 pandemic.

More news…

Media Relations - External Relations

The University of Nottingham
C Floor, Pope Building (Room C4)
University Park
Nottingham, NG7 2RD

telephone: +44 (0) 115 951 5798
email: pressoffice@nottingham.ac.uk