Babesios
Many farms in the counties in the south of Sweden have difficulties with diseases spread by ticks; mainly babesiosis and tick-borne fever (TBF) but there are indications that borreliosis ought to be included. All of the tick-borne diseases radically decrease farm profit if the herd is affected. The...
| Main Author: | |
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| Format: | Otro |
| Language: | Swedish Swedish |
| Published: |
2003
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| Subjects: | |
| Online Access: | https://stud.epsilon.slu.se/12719/ |
| _version_ | 1855572118448635904 |
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| author | Lundström, Sara |
| author_browse | Lundström, Sara |
| author_facet | Lundström, Sara |
| author_sort | Lundström, Sara |
| collection | Epsilon Archive for Student Projects |
| description | Many farms in the counties in the south of Sweden have difficulties with diseases spread by ticks; mainly babesiosis and tick-borne fever (TBF) but there are indications that borreliosis ought to be included. All of the tick-borne diseases radically decrease farm profit if the herd is affected. The production of the vaccine used against babesiosis since the 1920´s, will be discontinued in the near future and in addition to economical reasons it is therefore important to learn more about the diseases above.
During the summer and fall of 2002 and 2003, a farm in the island of Gotland was burdened with unusually many cases of bovine babesiosis. In total 43 animals fell ill and one died. The farm had not had any cases for over ten years; they do not vaccinate their calves but try to infect them naturally on tickinfested pastures. Bloodsamples from the cows showed that they were all negative for Borrelia burgdorferi sensu lato while most of the animals tested for Anaplasma phagocytophilum were positive. The most probable cause for the large outbreak of babesiosis is that the animals do not produce enough protective antibodies against Babesia eventhough they graze areas which are supposed to contain the disease, in combination with a simultaneos TBF-infection, which impairs the immunesystem. |
| format | Otro |
| id | RepoSLU12719 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish swe |
| publishDate | 2003 |
| publishDateSort | 2003 |
| record_format | eprints |
| spelling | RepoSLU127192017-10-19T12:56:42Z https://stud.epsilon.slu.se/12719/ Babesios Lundström, Sara Animal diseases Many farms in the counties in the south of Sweden have difficulties with diseases spread by ticks; mainly babesiosis and tick-borne fever (TBF) but there are indications that borreliosis ought to be included. All of the tick-borne diseases radically decrease farm profit if the herd is affected. The production of the vaccine used against babesiosis since the 1920´s, will be discontinued in the near future and in addition to economical reasons it is therefore important to learn more about the diseases above. During the summer and fall of 2002 and 2003, a farm in the island of Gotland was burdened with unusually many cases of bovine babesiosis. In total 43 animals fell ill and one died. The farm had not had any cases for over ten years; they do not vaccinate their calves but try to infect them naturally on tickinfested pastures. Bloodsamples from the cows showed that they were all negative for Borrelia burgdorferi sensu lato while most of the animals tested for Anaplasma phagocytophilum were positive. The most probable cause for the large outbreak of babesiosis is that the animals do not produce enough protective antibodies against Babesia eventhough they graze areas which are supposed to contain the disease, in combination with a simultaneos TBF-infection, which impairs the immunesystem. Babesios, i Sverige orsakad av B. divergens, beskrivs traditionellt som en fästingburen sjukdom med enstaka insjuknande kor i en besättning. Kalvar visar sällan symtom då så kallad omvänd åldersresistens föreligger. Då över 50% av en besättning plötsligt uppvisar en komplex sjukdomsbild där babesios ingår, är det nödvändigt att utreda orsakerna. De blodprov som tagits från den ovan drabbade besättningen visar tydligt att det förekommer saminfektion med B. divergens och A. phagocytophilum. Den senare är känd för att försvaga immunförsvaret hos drabbade djur och detta kan resultera i allvarligare symtom eller att djuret drabbas av flera olika sjukdomar. Detta är en trolig orsak till det ovanligt kraftiga babesiosutbrottet. Provsvaren visar även att djur som betar på marker där de borde drabbas av smittförande fästingar i vissa fall ej utvecklar antikroppar mot B. divergens. Orsaken till detta är ej klarlagd. Eftersom babesios sprids med fästingar det viktigt att utreda alla orsaker till förändringar i fästingpopulationen. Rådjur anses vara viktiga reservoirer för fästingar och om man introducerar rådjur till helt nya områden, till exempel Gotland, bör detta föra med sig förändringar i fästingantalet och därmed antalet babesiosfall. Ympämnet mot babesios, det så kallade vaccinet, produceras sista gången i Sverige våren 2004; därför är det ytterst aktuellt att utreda hårt drabbade gårdar samt finna bra profylaktiska metoder mot denna och övriga fästingburna sjukdomar. Tills vidare är de olika fästingrepellerande medel som finns på marknaden i kombination med förståndig betesrotation och röjning av sly och högt gräs de enda möjligheterna för att undgå fästingburna sjukdomar. 2003-12-22 Other NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/12719/1/lundstrom_s_171019.pdf Lundström, Sara, 2004. Babesios : en fallbeskrivning samt diskussion av fästingburna sjukdomar hos nöt i Sverige. UNSPECIFIED, Uppsala. Uppsala: (VH) > Dept. of Ruminant Medicine and Veterinary Epidemiology <https://stud.epsilon.slu.se/view/divisions/HIST=3A120051.html> urn:nbn:se:slu:epsilon-s-8059 swe |
| spellingShingle | Animal diseases Lundström, Sara Babesios |
| title | Babesios |
| title_full | Babesios |
| title_fullStr | Babesios |
| title_full_unstemmed | Babesios |
| title_short | Babesios |
| title_sort | babesios |
| topic | Animal diseases |
| url | https://stud.epsilon.slu.se/12719/ https://stud.epsilon.slu.se/12719/ |