Feline infectious peritonitis (FIP) is a disease that can affect cats and is caused by a feline coronavirus (FCoV). FCoV is spread via the feacal-oral route and many cats are carriers of the virus. Despite that, very few of the carrier cats develop FIP. The explanation of this phenomenon is that the virus has to mutate to be able to cause FIP and in the majority of the carrier cats this mutation never occurs. FIP is very hard to diagnose because the symptoms are diffuse and a completely accurate diagnosis can almost exclusively be established during a postmortem necropsy.

The thesis evaluates a new kind of bearing arrangement in a traction motor that ABB hasdeveloped. Since the arrangement is designed in a new and innovative way it needs to beevaluated to see if it is safe to use. In today?s traction motors, bearings with a big internalclearance (C4-clearance) are used. The basic idea of the new arrangement is to reduce the fitsbetween the bearing and shaft/house.

Virala orsaker till reproduktionsstörningar så som abort, resorption av foster och dödfödda valpar är hos hundar ofullständigt kartlagda. Herpesvirus är det agens som har studerats mest och är även ett välkänt abortagens på andra djurslag, däribland häst. Hundens herpesvirus (CHV-1) orsakar hos vuxna individer i regel endast milda respiratoriska symptom. Hos dräktiga djur kan viruset ge upphov till förlust av valpar och även orsaka en kraftig och dödlig infektion hos neonatala valpar. Precis som många andra herpesvirus kan CHV-1 ge upphov till en latent infektion som kan reaktiveras vid stress.

Papillomvirus är ett cirkulärt naket dubbelsträngat DNA-virus som kan orsaka benigna eller maligna transformationer i epitel på de allra flesta djur. Olika djurslag har olika artspecifika papillomvirus. Viruset sprids via direkt- eller indirekt kontakt. Hos människa finns över 100 olika typer av humant papillomvirus (HPV) som har olika predilektionsställen på kroppen. Cirka 40 av dem angriper anogenitala områden där vissa kan ge upphov till könsvårtor medan andra ger cellförändringar som senare kan utvecklas till cancer. Hos kvinnor är slemhinnan i cervix känslig för onkogena HPV och cellförändringar där kan leda till cervixcancer (CC).

This work reveals the results of BAL performed on horses included in a larger study that assessed the relationship of amount and type of inhaled particles in equine stable air on indices of respiratory inflammation in horses and people. During this study an unanticipated and marked elevation in lung eosinophils was detected in a number of the horses. The possible significance and cause of this pulmonary eosinophilia was investigated further, and is the main focus of the work presented.

Porcine circovirus type 2 (PCV2) is a common virus present in most parts of the world. PCV2 has been pointed out as the major causative agent to post weaning multisystemic wasting syndrome (PMWS) that affects pigs after weaning. The clinical symptoms of PMWS are impaired growth, diarrhoea, respiratory problems and increased mortality. At autopsy enlarged lymph nodes with depletion of lymphocytes are commonly found. Since 1991 PMWS has spread all over the world and was first described among Swedish pigs in 2003. Although PCV2 is widespread, only some pigs develop PCV2-related diseases. Why this is and what other factors that are required in order for the disease to develop is yet unknown. The main theories involve other infections, for example PRRS, and management issues but also genetic differences between pigs and/or virus strains have been suggested.

I dag kan man oftast läsa om olika säkerhetshot och risker en datoranvändare måste tänka på för att inte ge någon utomstående möjlighet att komma åt känslig och/eller privat information. Här talas det om nya virus och nya typer av trojaner som sprids som epidemier över Internet, och i bland handlar det om ett spionprogram som följer med en nedladdad fil. Det är svårt att hålla reda på alla typer av skadlig kod som nämns fast med ökad förståelse ökar också chanserna för att klara sig från smitta. Det har visat sig att utvecklingen av skadlig kod är lika stark som den inom kommersiella mjukvaror. Från persondatorns uppkomst i början av 80-talet och fram till i dag, har utveckling skett i alla områden av den skadliga kod det handlar om strategi, syfte och framförallt ren kodkomplexitet.Dagens ledande leverantör av operativsystem och webbläsare, Microsoft, lovar allt mer sofistikerade säkerhetslösningar varje gång en ny version av ett program släpps.

The Bovine respiratory syncytial virus (BRSV) causes bronchiolitis and interstitial pneumonia, predominantly in calves, and is a major cause of bovine respiratory disease worldwide. In humans, BRSV is paralleled by the closely related Human respiratory syncytial virus (HRSV), an important cause of respiratory disease, most severe in infants.The clinical signs and pathology during RSV infection is caused, not only by the direct effects of viral replication, but also by the response of the host immune system. The immunopathology of RSV has long obfuscated our understanding of the disease, and development of effective treatment and vaccines will be very difficult until greater knowledge is gained.One of the components of the immune system that has come into focus in RSV research the last few years, is the Toll-like receptor 4 (TLR4). The TLR4 receptor is well known as the receptor that binds lipopolysaccaride (LPS), and initiates the host response to bacterial infection. Recently, it has been shown that the fusion protein of RSV also interacts with, and up-regulates the expression of, the TLR4 receptor.

Flowcytometric technology has been widely used for measurement of the absolute numbers of T-lymphocytes subsets in Human Immunodeficiency virus (HIV), defining the disease state, monitoring antiviral treatment, and identifying any risk for opportunistic infections. A manual preparing of the samples is required. More recently an automated and enclosed blood cell counting, Celldyn Sapphire has been introduced. In this study the performance of the Flow cytometer EPICS XL as a reference method for analysis of CD3+, CD4+ and CD8 T-lymphocytes was evaluated with blood from 40 individual?s samples.

African swine fever, ASF, was first described 1921, in Kenya. The virus has thereafter spread through many African countries as well as in Europe, Asia, South- and Central America. The virus is spread via three different cycles, of which one is sylvatic and includes warthogs and soft ticks. The other two are between domestic pigs and the one most common one is caused by humans, who not always realize the seriousness of precautions. The infection manifests as hemorrhagic fever, but can also be more or less unnoticed. The aim of this study was to use molecular tools to detect and partly genetically characterize ASFV both in soft ticks and in serum from domestic pigs in Uganda. Comparing viruses detected in ticks with those detected in domestic pigs I also wanted to investigate possible links between the sylvatic and domestic cycle.

The reason why I choose the subject ?Warts on teats of Dairy Cows? was because the herd I work with has big problems with skin-complaint on teats and udder. So I found it interesting to try to find the reason why the cows look like they do and even to find a way to relieve the trouble. The examine work included both a literature research, an experimental test, concerning a comparison of different teat sprays and also an inquiry-research about the occurrence of warts in practical herds in order to collect as much facts as possible. Three companies, selling different types of teat disinfectants, were willing to sponsor the teat dipping experiment. The aim of the experiment was to see if any special disinfectant had more pronounced healing effects on teat warts. The date for the experiment was 18th December 2004 to 22nd January 2005, which was going to be 5 weeks.The experiment was carried out in the herd of Ola and Eskil Carlsson in Fjärlöv, Hässleholm. The three compared teat spray chemicals were; Nova Viri Sun, Nardosept, and BlockadeTM. These chemicals were compared to one control group, which teats were treated with the ordinary chemical normally used in the herd, i.e.

When investigating mechanical problems it is often more convenient to deal with scalars rather than vectors. In this project methods stemming from the field of analytical mechanics, which lets one derive the equations of motion using scalar quantities instead of vectors, have been used. Two mechanical problems were investigated, a double pendulum with a spring and particles orbit in a sphere. The equations of motion of the two systems were derived with the assistance of computer algebra, using Maple and the external package Sophia. The systems were investigated with regard to periodicity and conserved quantities..

Stick- och skärskador utgör den största risken för överföring av blodsmitta i sjukvården. De vanligaste smittämnena är hepatit B-virus, hepatit C-virus och HIV, som kan åstadkomma kronisk sjukdom och t o m vara letala. Därför måste förebyggande arbete för att undvika sådana skador prioriteras. Åtgärder vid tillbud eller skada finns beskrivna i arbetarskyddsstyrelsens regelverk. Riskbedömningar är gjorda för dessa virus och rutiner är utarbetade för upp-följning efter stickskada med provtagning och i vissa fall profylaktisk behandling.

In an attempt to develop a more cost-efficient material for solar   energy applications, nano-particles of nickel oxide composite in a silikatmatris manufactured with solar gelmethod and studied structurally by electron microscopy. Furthermore, the thin film optical properties characterized by Variable. Angel Spectroscopic Ellipsometry. Sol gelfilms suitability as a selective absorber surface is also analyzed by optical modeling..

Japanese encephalitis virus (JEV) is one of the leading causes of acute encephalitis in humans. The virus is spread by mosquitoes, mainly belonging to the Culex species. The main reservoirs are considered to be birds and pigs, with pigs constituting the most important reservoir in regard to human infection. During the last few decades the production of pork has increased significantly in Vietnam. With 90% of pigs being kept in households owning 10 pigs or less, pigs are widely spread across most parts of the country.