Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis
The prime aim of this thesis was to investigate whether high or low iodine intake during certain periods of life was, or was not a strong risk factor for the development of canine lymphocytic thyroiditis (CLT). And secondly, if a high or low selenium intake in a combination with high or low iodine i...
| Autor principal: | |
|---|---|
| Formato: | Second cycle, A2E |
| Lenguaje: | sueco Inglés |
| Publicado: |
2011
|
| Materias: | |
| Acceso en línea: | https://stud.epsilon.slu.se/2753/ |
| _version_ | 1855570476280053760 |
|---|---|
| author | Johansson, Janet |
| author_browse | Johansson, Janet |
| author_facet | Johansson, Janet |
| author_sort | Johansson, Janet |
| collection | Epsilon Archive for Student Projects |
| description | The prime aim of this thesis was to investigate whether high or low iodine intake during certain periods of life was, or was not a strong risk factor for the development of canine lymphocytic thyroiditis (CLT). And secondly, if a high or low selenium intake in a combination with high or low iodine intake also may have an influence on that risk factor. To investigate this, a dietary questionnaire was sent out to dog owners. The dogs were selected from an ongoing genetic study of CLT. The questions investigated brand and type of feed during different life stages (puppy, junior and adult) and also if there were any use of dietary supplements. The thesis was also extended with a substantial literature review about the relationship between iodine, selenium (both excess and deficiency) and the thyroid hormone metabolism.
In some parts of the world, humans suffer from an autoimmune thyroid disease called Hashimoto’s as a result of high iodine intake. Previous studies have indicated that high iodine intake could also be linked to canine lymphocyticthyroiditis, the dogs equivalent to Hashimoto´s disease. The result of the questionnaire showed that most dogs have had high iodine feeds during some period in life. Due to lack of data regarding selenium content in feeds, these effects could not be evaluated. Any distinct connection between iodine intake and development of canine lymphocytic thyroiditis could not be proven. |
| format | Second cycle, A2E |
| id | RepoSLU2753 |
| institution | Swedish University of Agricultural Sciences |
| language | swe Inglés |
| publishDate | 2011 |
| publishDateSort | 2011 |
| record_format | eprints |
| spelling | RepoSLU27532024-07-11T10:34:25Z https://stud.epsilon.slu.se/2753/ Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis Johansson, Janet Animal feeding Animal genetics and breeding Animal physiology - Nutrition The prime aim of this thesis was to investigate whether high or low iodine intake during certain periods of life was, or was not a strong risk factor for the development of canine lymphocytic thyroiditis (CLT). And secondly, if a high or low selenium intake in a combination with high or low iodine intake also may have an influence on that risk factor. To investigate this, a dietary questionnaire was sent out to dog owners. The dogs were selected from an ongoing genetic study of CLT. The questions investigated brand and type of feed during different life stages (puppy, junior and adult) and also if there were any use of dietary supplements. The thesis was also extended with a substantial literature review about the relationship between iodine, selenium (both excess and deficiency) and the thyroid hormone metabolism. In some parts of the world, humans suffer from an autoimmune thyroid disease called Hashimoto’s as a result of high iodine intake. Previous studies have indicated that high iodine intake could also be linked to canine lymphocyticthyroiditis, the dogs equivalent to Hashimoto´s disease. The result of the questionnaire showed that most dogs have had high iodine feeds during some period in life. Due to lack of data regarding selenium content in feeds, these effects could not be evaluated. Any distinct connection between iodine intake and development of canine lymphocytic thyroiditis could not be proven. Den primära frågeställningen för detta examensarbete var om jod i överskott eller underskott under specifika perioder av en hunds liv kunde påverka huruvida individen skulle utveckla autoimmun sköldkörtelrubbning, lymfocytär thyroidit eller inte. En sekundär frågeställning var om även selen i överskott eller underskott kunde vara en riskfaktor. Ett frågeformulär skickades till hundägare som sedan tidigare ingår i en omfattande studie av genetiska riskfaktorer . Frågorna handlade om vilka foder hunden har ätit under sin livstid (som valp, junior och vuxen). Frågor ställdes även om hundarna fått några tillskott till fodret och i så fall vilka. Arbetet kompletterades med en omfattande litteraturstudie för att förklara hur jod och selen påverkar hormonmetabolismen samt hur den påverkas av överskott respektive underskott. Människor i delar av världen där jodintaget är stort utvecklar många gånger hypothyroidism pga. en autoimmun reaktion som på människa kallas Hashimoto’s sjukdom. Motsvarigheten på hund kallas Lymfocytärthyroidit och har många likheter med Hashimoto’s på människa. Tidigare studier har indikerat ett möjligt samband mellan ett alltför rikligt intag av jod och utvecklingen av Lymfocytär thyroidit hos hund. Resultatet visade att de flesta hundarna under någon gång i sitt liv äter en diet med högt jodinnhåll. Pga bristande uppgifter om seleninnehåll kunde dess effekter inte utvärderas. Något klart samband mellan jod och utvecklingen av autoimmun sköldkörtelrubbning kunde inte påvisas. 2011-06-06 Second cycle, A2E NonPeerReviewed application/pdf swe https://stud.epsilon.slu.se/2753/1/johansson_j_110606.pdf Johansson, Janet, 2011. Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis. Second cycle, A2E. Uppsala: (VH) > Dept. of Clinical Sciences (until 231231) <https://stud.epsilon.slu.se/view/divisions/OID-715.html> urn:nbn:se:slu:epsilon-s-257 eng |
| spellingShingle | Animal feeding Animal genetics and breeding Animal physiology - Nutrition Johansson, Janet Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis |
| title | Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis |
| title_full | Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis |
| title_fullStr | Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis |
| title_full_unstemmed | Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis |
| title_short | Review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis |
| title_sort | review of the litterature and an attempt to evaluate intake levels of iodine and selenium in dogs with and without lymphocytic thyroiditis |
| topic | Animal feeding Animal genetics and breeding Animal physiology - Nutrition |
| url | https://stud.epsilon.slu.se/2753/ https://stud.epsilon.slu.se/2753/ |