Luftvägssjukdomar är ett av de vanligaste hälsoproblemen hos kalvar och utgör en betydande kostnad för branschen. Luftvägssjukdomar är komplexa till sin natur och uppkommer endast då en kombination av faktorer som inkluderar djuret, miljön och infektiösa agens förekom-mer. Ofta är den primära patogenen ett virus och den påföljande lunginflammationen orsakas av bakterier. Ett bidragande virus, BVDV, har genom ett frivilligt kontrollprogram utrotats i Norden och det finns potential att utrota även BRSV. Genom en ökad förståelse för biosäker-het och hur ventilation av mikromiljöer, gruppstorlek och ålderssammansättning påverkar smittrycket och luftvägshälsan hos kalvar kan byggnader och management-rutiner som mini-merar risken för respiratoriska sjukdomar utformas..

This paper shortly describes the coronavirus family, bovine corona viruses (BCV) properties and two diseases that BCV causes, winter dysentery and Calf diarrhoea. The purpose of the study was to compare different diagnostic methods to detect BCV. Different methods are discussed, PCR, ELISA, immunofluorescense and virus isolation. Investigations were made in three different herds with winter dysentery; one dairy cattle farm with about 100 cows of different ages, one testing station for bulls with about 150 bulls and another small dairy cattle farm with 26 cows and 20 replacement heifers and calves. Faeces and nasal swabs were analysed with PCR and ELISA. The result shows that PCR seems to be a reliable method for detecting BCV but that the ELISA test can not be used as a reliable diagnostic method to analyse samples from animals with winter dysentery..

In Kenya the Maasai pastoralists have based their livelihoods on dairy production and the production goal is to maintain a sufficient milk supply throughout the year. The pastoral dairy production has two vital characteristics; breeding and milking. Traditionally, breeding is the men?s responsibility, while milking is the duty of women. Depending on this partition of chores between men and women, they also have different management routines, ambitions and strategies regarding the milk production.

Pneumonia is a common disease in calves. There are several causes behind the disease. The main purpose of this litterary study was to estimate what kind of nursing calves with pneumonia could benefit from, especially the evidence-based nursing recommendations for the sick calves. A further purpose was to gain knowledge of different treatments of sick calves and what kind of practical measurements that are most suitable to use in the preventive work. The results in this study shows that there are only suggestions of nursing, rather than some actual evidence-based actions. The most important nursing actions is to isolate the calves with dyspnea, prevent or treatment of hypothermia, potential dehydration and malnutrition. It is also important to make sure to place the Calf on soft and dry bedding.

Maize for silage has been used as fodder in different parts of the world for a long time and has recently become more common also in Sweden. Our cold climate has been a problem as maize is very sensitive to low temperatures and frost. With new varieties and better techniques for cultivation it is now possible to grow maize in the southern and middle parts of Sweden. As for the north of Sweden the length of the cultivation season is a limiting factor as there are too few days with temperatures of over +10 ºC. Maize is well suited for silage making but oxygen-free conditions are required.

Cryptosporidium parvum är en parasit som orsakar mild till allvarlig diarré hos unga kalvar. Den sprids snabbt i en besättning och det är önskvärt att snabbt kunna identifiera patogenen för att bryta smittkedjan. I svenska mjölkbesättningar dominerar dock Cryptosporidium bovis hos unga kalvar och även kryptosporidiearterna C. ryanae och C. andersoni har återfunnits i åldersgruppen.

The aim of this literature review was to discern which legislations and regulations related to animal welfare that comprises reindeer and their significance in reindeer husbandry. The Swedish Animal Welfare Act (1988:534) was enacted July 1, 1988 and its main purpose is to ensure a good animal health and environment. Animals that live in a good environment with good health is considered to have good welfare, which can be described as an individual's condition in relation to its surroundings. Reindeer herding is an extensive form without daily management. In reindeer husbandry there are eight specific seasons over the year and reindeer are handled as they migrates between pastures, get earmarks, are sorted for transport and slaughter.

Neospora caninum is an intracellular parasite that was first recognized in dogs in 1984. The parasite is now one of the most commonly diagnosed infectious causes of abortion in cattle word wide. N. caninum is transmitted to cattle in two ways. They may be infected from eating food contaminated with oocysts from a definitive host or they may be infected in utero from an infected mother. The infection is transmitted efficiently from cow to her offspring and this can occur for generations.

Heifer?s growth may be divided into three main phases: Calf period, puberty and pregnancy. When the heifers are about three months old a critical period begins. This period ends when the heifer reach puberty and have her first oestrus at around 9-12 months of age. In the critical period the mammary gland starts to grow at a fast rate and Insulin-like growth factor-1 (IGF-1) transport the growth signals to the mammary glands.

In modern dairy production, the newborn Calf generally is separated from its mother and put in a single pen for some time before it is introduced to group housing. Group housing is becoming more and more common because it saves the farmer a lot of valuable time. Even thought group housing has a lot of benefits it is often associated with a higher morbidity and mortality in the young calves. Therefore, knowing the optimal way to use the group pen lies in many farmers? interests and the importance of different factors such as the optimal age of introduction is important to evaluate. The aim of this study was to investigate the effect of age at introduction to group housing on the health of the calves in the group pen.

The purpose of this literature study was to investigate the possibilities to improve longevity and stayability of beef cattle with breeding. The breeding goal for beef breeds is to produce animals with high capacity for growth and good feed efficiency. Longevity and sustainability are two important features to include in the breeding goal. If longevity is increased each cow can produce more calves and the number of female calves used for recruitment can be reduced and only the best heifers need to be selected for breeding. The benefits of longer life is that it lowers the costs of recruitment animals, it increases the number of young animals that become available for slaughter, and it increases the proportion of high producing animals in the herds.

The bacterium Lactobacillus reuteri, which natural habitat is in the intestine of mammals and birds, uses glycerol as a substrate for production of the antimicrobial compound reuterin. Glycerol has been shown to decrease the number of Escherichia coli in human feces and it is believed to be due to in situ production of reuterin. E. coli belongs to the large family of Enterobacteriaceae, naturally occurring in the intestine, and pathogenic strains of E. coli have been shown to be one of several bacteria causing diarrhoea in calves.

The objective of this thesis was to get more knowledge about how to design a dairy farm reducing the working hours and the work tasks whit high work load. I will try to reduce the working hours and the tasks whit high work load on my own farm witch I am about inherit. Today, the old stanchion barn has room for about 60 cows and 74 young cattle and need two men to run it every day. The total acre is 188 hectare, 100 hectare forest, 65 hectare farmlands and 23 hectare natural pasture. I have studied two solutions. In the first solution, I will use my old barn for young cattle and build a new barn for the cows.

The background of this study is an article in the hunting magazine ?Svensk Jakt? where Karl Hedin claims that his sawmills has not noticed any significant moose damages in the timber. The purpose with the study is to find out the causes to the moose explosion and what it has led to in today?s forests. A questionnaire has been sent out to sawmills in the region Dalarna with the purpose of finding out if sawmills receive moose-damaged timber and what they think about how they foresee future development. There were two causes of the moose explosion, that had effects on the moose population. The first cause was that the moose hunters wanted to raise the moose population, and by raising the Calf shooting and by saving the cows they succeeded. The second cause was changing methods in Swedish forestry.

The background of this study is an article in the hunting magazine ?Svensk Jakt? where Karl Hedin claims that his sawmills has not noticed any significant moose damages in the timber. The purpose with the study is to find out the causes to the moose explosion and what it has led to in today?s forests. A questionnaire has been sent out to sawmills in the region Dalarna with the purpose of finding out if sawmills receive moose-damaged timber and what they think about how they foresee future development. There were two causes of the moose explosion, that had effects on the moose population. The first cause was that the moose hunters wanted to raise the moose population, and by raising the Calf shooting and by saving the cows they succeeded. The second cause was changing methods in Swedish forestry.