408 – Milk acidification to control the growth of Mycoplasma bovis and Salmonella Dublin in contaminated milk (Research paper – Parker – 2016)

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408 Research paper – Parker – 2016 – Milk acidification to control the growth of Mycoplasma bovis and Salmonella Dublin in contaminated milk

408 Research paper
Milk acidification to control the growth of Mycoplasma bovis and Salmonella Dublin in contaminated milk by Parker, A.M., House, J.K., Hazelton, M.S., Bosward, K.L., Mohler, V.L., Maunsell and P.A. Sheehy 2016 Journal of Dairy Science 99: 9875–9884
In Significant Impact Groups: Feed / gut health \ Early feeding (colostrum/feed)
Species targeted: Dairy;
Age: Young;
Summary:
Bacterial contamination of milk fed to calves compromises calf health. Several bacterial pathogens that infect cows, including Mycoplasma bovis and Salmonella enterica ssp. enterica serovar Dublin, are shed in milk, providing a possible route of transmission to calves. Milk acidification lowers the milk pH so that it is unsuitable for bacterial growth and survival. The objectives of this study were to (1) determine the growth of M. bovis and Salmonella Dublin in milk, and (2) evaluate the efficacy of milk acidification using commercially available acidification agent (Salstop, Impextraco, Heist-op-den-Berg, Belgium) to control M. bovis and Salmonella Dublin survival in milk. Results demonstrate that milk acidification using Salstop is effective at eliminating viable M. bovis and Salmonella Dublin organisms in milk if the appropriate pH and exposure time are maintained.
408 Research paper – Parker – 2016 – Milk acidification to control the growth of Mycoplasma bovis and Salmonella Dublin in contaminated milk
Where to find the original material: https://www.journalofdairyscience.org/article/S0022-0302(16)30661-0/fulltext; http://dx.doi.org/10.3168/jds.2016-11537
Country: Australia

407 – Effects of feeding untreated pasteurized and acidified waste milk and bunk tank milk on the performance serum metabolic profiles immunity and intestinal development in Holstein calves (Research paper – Zou – 2017)

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407 Research paper – Zou – 2017 – Effects of feeding untreated pasteurized and acidified waste milk and bunk tank milk on the performance serum metabolic profiles immunity and intestinal

407 Research paper
Effects of feeding untreated, pasteurized and acidified waste milk and bunk tank milk on the performance, serum metabolic profiles, immunity, and intestinal development in Holstein calves by Zou, Y., Wang, Y., Deng, Y. Cao, Z., Li, S., and J. Wang 2017 Journal of Animal Science and Biotechnology 8: 11p
In Significant Impact Groups: Feed / gut health \ Early feeding (colostrum/feed)
Species targeted: Dairy;
Age: Young;
Summary:
The present experiment was performed to assess the effects of different sources of milk on the growth performance, serum metabolism, immunity, and intestinal development of calves. Eighty-four Holstein male neonatal calves were assigned to one of the following four treatment groups: those that received bunk tank milk(BTM), untreated waste milk (UWM), pasteurized waste milk (PWM), and acidified waste milk (AWM) for 21 d.Conclusions: Overall, bunk tank milk is the best choice for calf raising compared to waste milk. The efficiency offeeding pasteurized and acidified waste milk are comparable, and the acidification of waste milk is an acceptablelabor-saving and diarrhea-preventing feed for young calves.
407 Research paper – Zou – 2017 – Effects of feeding untreated pasteurized and acidified waste milk and bunk tank milk on the performance serum metabolic profiles immunity and intestinal development in Holstein calves
Where to find the original material: https://jasbsci.biomedcentral.com/articles/10.1186/s40104-017-0182-4; DOI 10.1186/s40104-017-0182-4
Country: China

 

406 – Effects of butyric acid supplementation (Research paper – Sun – 2019)

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406 Research paper – Sun – 2019 – Effects of butyric acid supplementation

406 Research paper
Effects of butyric acid supplementation of acidified milk on digestive function and weaning stress of cattle calves by Sun, Y.Y., Li, J., Meng, Q.S., Wu, D.L. and M. Xu
2019 Livestock Science Volume 225: 78-84
In Significant Impact Groups: Feed / gut health \ Early feeding (colostrum/feed)
Species targeted: Dairy;
Age: Young;
Summary:
Feed supplements can enhance the health and productivity of livestock. The effects of butyric acid supplementation of acidified milk (AM) on the digestive function of calves and weaning stress were investigated. Thirty-six Holstein calves with a mean age of 5 ± 1 d were selected and divided into three groups (n = 12) and fed: (1) AM (CON); (2) AM + 0.3% butyric acid (BA0.3); or (3) AM + 0.6% butyric acid (BA0.6). Body weight (BW) and body size indicators were recorded during the preweaning stage. At 56 d, 18 calves were euthanized to determine the length and width of their ruminal papillae, duodenum villi, jejunum villi, and ileal villi; emptied rumen, reticulum, omasum, and abomasum weight; and small intestinal mucosa thickness. In conclusion, the addition of butyric acid to AM can reduce the rate of diarrhea, weaning stress and improve metabolic and physical development of the gastrointestinal tract.
406 Research paper – Sun – 2019 – Effects of butyric acid supplementation of acidified milk on digestive function and weaning stress of cattle calves
Where to find the original material: https://www.sciencedirect.com/science/article/abs/pii/S187114131930318X?via%3Dihub; https://doi.org/10.1016/j.livsci.2019.04.021
Country: China

Best Practice Guide: Youngstock Management and Early Rearing

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Check out this collection of practical information about youngstock management and early rearing!

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334- Reduction of Mycobacterium avium ssp. paratuberculosis in colostrum_ Development and validation of 2 methods (Research paper – Verhegghe – 2017)

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334 Research paper – Verhegghe – 2017 – Reduction of Mycobacterium avium ssp. paratuberculosis in colostrum_ Development and validation of 2 methods one based on curdling and one based on ce

In Significant Impact Groups: Pathogen management
Species targeted: Dairy;
Age: Young;
Summary:
The aim of this study was to develop and validate 2 protocols (for use on-farm and at a central location) for the reduction of Mycobacterium avium ssp. Paratuberculosis (MAP) in colostrum while preserving beneficial immunoglobulins (IgG). The on-farm protocol was based on curdling of the colostrum, where the IgG remain in the whey and the MAP bacteria are trapped in the curd. The semi-industrial protocol was based on centrifugation, which causes MAP to precipitate, while the IgG remain in the supernatant. The effect of the colostrum treatment on the nutritional value and palatability of the colostrum and the IgG transfer was assessed in calves. The treated colostrum had no negative impact on animal health, IgG uptake in the blood serum, milk, or forage uptake. Two protocols to reduce MAP in colostrum (for use on-farm or at a central location) were developed and both methods preserve the vital IgG.

Where to find the original material: https://www.sciencedirect.com/science/article/pii/S0022030217302436; https://doi.org/10.3168/jds.2016-12355
Country: BE

307 – Milk supplemented with immune colostrum – Protection against rotavirusdiarrhea and modulatory effect on the systemic and mucosal antibodyresponses (Research paper – Parreno – 2010)

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307 Research paper – Parreno – 2010 – Milk supplemented with immune colostrum_ Protection against rotavirusdiarrhea and modulatory effect on the systemic and mucosal antibodyresponses

In Significant Impact Groups: Feed / gut health \ Early feeding (colostrum/feed)
Species targeted: Dairy; Beef;
Age: Young;
Summary:
Giving milk supplemented with rotavirus immune colostrum for the first 14 days of life induced high protection rates against rotavirus diarrhoea in calves during the period of peak susceptibility to infection and a positive effect of the calves’ immune responses. All calves received control colostrum prior to gut closure followed by the milk supplemented with immune colostrum, twice a day, for 14 days. Calves received milk supplemented with 0.8% immune colostrum (G1) or milk supplemented with 0.4% immune colostrum (G2). Calves were inoculated with rotavirus at 2 days of age. After challenge, all calves in G1 and 2 were fully protected against diarrhoea and only 1 of 5 calves in G1 shed virus asymptomatically. The duration of the supplemented milk feeding were key factors to obtain high protection during the period of peak susceptibility to diarrhoea.

Where to find the original material: https://pubmed.ncbi.nlm.nih.gov/20138373/; https://doi.org/10.1016/j.vetimm.2010.01.003
Country: AG

How to ensure that good quality colostrum is fed?

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To control the colostrum management in a herd, it is important to make a system where the calves’ level of IgG is examined. This is done by a blood sample of the calf between 1-7 days after birth. A representative sample must be taken to assess the herd level. If more than 90% of the tested calves are above 10 g/l then the colostrum management is satisfactory. If a larger proportion is below 10 g/L, it is important to review all procedure to find possible optimization points. 

Quality, quantity, speed and hygiene are the parameters that are important to achieve a satisfactory IgG level in the calf. 

  • Quality: the colostrum quality is measured immediately after milking by a colostrometer or by a Brix meter. The goal must be that 90% is above 50 g/l, which corresponds to 22% on the Brix meter 
  • Quantity: to obtain adequate supply of immunuglobulins it requires 3-4 liters at first feeding 
  • Speed: the reason why it is important to add colostrum quickly after birth is due to the ability of the intestinal wall to absorb immunuglobulins decreases rapidly and after 24 hours the ability has disappeared. The goal is to give colostrum within the first 1-2 hours after birth 
  • Hygiene: it is possible to do hygiene checks on colostrum to see how hygiene procedures work while handling colostrum. A sample of the colostrum is taken just before the first feeding and then a germ count is done. There should be less than 100,000 CFU / ml in the colostrum. 

Keeping dairy cows and calf together – how to manage biosecurity and health

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Separation of cow and calf at birth has been common practice for decades. The interest in keeping cow and calf together for a longer time is increasing among both farmers and consumers. Before you start practicing this you must consider a few things first. Biosecurity is vital if you want to succeed.  

 

Uncover the risks 

Take a critical look at your farm – consult your veterinarian. Uncover the risks for introduction of new infectious diseases, but also the risk of spreading diseases already present at the farm. When you know the risk factors on your farm, you can take care of them. 

 

Small groups 

It is important to keep the cows and calves in smaller groups. Larger groups mean more options for contact between animals and a higher risk for spreading of diseases.  

 

Monitor colostrum quality and uptake 

Colostrum is critical for the newborn calf. You can not be sure that a calf that is only nursed by the cow gets enough colostrum. Up to 60 % of the calves will suffer to failure of passive transfer of antibodies. It is necessary to monitor both quality and amount of colostrum the calves ingest. Feeding the calf colostrum is a safe way to secure sufficient immunization. Always keep good quality colostrum in a colostrum bank, so you have colostrum to supply calves born from cows with little or to poor colostrum.  

 

Monitoring the calves  

Monitoring calf health is vital. Do not expect that the cow can do this job or that health monitoring is less time consuming when calves and cows are kept together. When calves are bucket fed twice daily, it is quite easy to monitor wellbeing of the calf, appetite and drinking speed. You do not get the same information if the cow is the caretaker. Therefore, the person responsible for monitoring the calves must look for the small signs of illness, so proper intervention can be carried out before it is too late.  

Vaccination of in-calf cows and housing practices against calf scour (Neonatal calf diarrhea)

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Calf scour (Neonatal calf diarrhoea) is the most common cause of disease and death in calves during the pre-weaning period. Scour can be due to both infectious (e.g., viruses and bacteria) or non-infectious causes (such as poor nutrition). Symptoms are most often diarrhoea that might be green, yellow or grey in colour, weak animals, dehydrated animal (especially when very young) causing sunken-eyes, etc.

Good hygiene, colostrum provision and biosecurity are important for minimising the chances of an outbreak occurring, independent of the cause of scour. Calves are most at risk from infectious scour in the first 3-4 weeks of life and need a continuous source of protection. In collaboration with their herd veterinarians, farmers can vaccinate in-calf cows against calf diarrhoea a few weeks before calving, while increasing the quantities of colostrum given to the calves at birth. After doing this, cases of diarrhoea in the calves should usually drop.

In addition, it is important to segregate calves by age to prevent passing infectious agents from older calves to younger more vulnerable ones and to maintain clean, dry housing with good ventilation. For example, individual pens (which are easier to clean, transport and disinfect) could be used to rear these calves.

85 A ‘meta-analysis’ of effects of post-hatch food and water deprivation on development, performance and welfare of chickens (Research paper; De Jong, 2017)

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Significant Impact Group(s): Feed / gut health \ Feeding management – Feeding management ; Water
Species targeted: Poultry;
Age: Young;
Outcome Parameter(s): body weight; cumulative food intake; FCR; mortality; relative yolk sac weight
Summary: This study reports results collected in other studies showing that post-hatch food deprivation or food and water deprivation (PHFWD) for approximately 24 hours can lead to significantly lower body weights compared to early fed chickens up to six weeks of age. Body weights and food intake were reduced more the longer the food and water deprivation lasted. PHFWD also has negative effects on the development of liver and pancreas, and delay the development of duodenum, jejunum and ileum. These effects were observed mainly in the first week of age. As a conclusion, findings also suggest a chicken welfare is lowered for PHFWD, however, additional studies are recommended on the effect of PHFWD containing a wider range of variables, including behaviour and disease resistance, in the short-term as well as long-term.
85 Research paper – de Jong – 2017 – A meta-analysis of effects of post-hatch food and water deprivation on development, performance and welfare of chickens
Where to find the original material:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5728577/; https://doi.org/10.1371/journal.pone.0189350
Country: NL

85 Research paper – de Jong – 2017 – A meta-analysis of effects of post-hatch food and water deprivation on development, performance and welfare of chickens