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Bengtström, Julia, 2015. Peripheral cemental caries in horses. Second cycle, A2E. Uppsala: SLU, Dept. of Clinical Sciences

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Abstract

During the past 15 years, equine dental practitioners in Sweden have experienced an increase in cemental caries. In 2002 a previously unknown bacteria, Streptococcus devriesei, was isolated from infundibular caries lesions. Between 2002 and 2009, all sampled Swedish horses with infundibular caries were positive for S. devriesei. An increasing number of negative controls with visually healthy cementum were also positive for the bacteria. The presence of SIgA (secretory immunoglobulin A) in saliva has been studied in horses with infundibular caries but the S. devriesei specific SIgA has not been proven to protect against infundibular caries. The oral microflora and SIgA levels of horses with peripheral caries lesions have not been studied before. Twenty-two horses with peripheral caries, 6 with infundibular caries and 3 negative controls were sampled for bacteriological analysis and SIgA levels. All but one were positive for S. devriesei. The bacterial levels did not correlate to the severity of the lesions. The 4 horses with the most severe peripheral caries lacked S. devriesei specific SIgA. Horses with high levels of total SIgA tended to also have high levels of S. devriesei specific SIgA.

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Hästpraktiker har upplevt att antalet hästar med cementkaries ökat de senaste 15 åren. År 2002 upptäcktes en tidigare okänd bakterie i infundibulära karieslesioner, Streptococcus devriesei. Mellan 2002 och 2009 var alla hästar med infundibulär karies, som provtogs i Sverige, positiva för S. devriesei. Sedan 2002 har ett ökande antal hästar med synligt frisk cement också burit på bakterien. Närvaron av SIgA (sekretorisk immunoglobulin A) i saliv har studerats hos hästar med infundibulär karies. SIgA har inte visats ha någon skyddande effekt mot infundibulär karies. Den orala mikrofloran och SIgA-nivåerna hos hästar med perifer karies hade inte tidigare studerats. Tjugotvå hästar med perifer karies, 6 med infundibulär karies och 3 negativa kontroller provtogs för bakterieanalys och SIgA-nivåer. Alla utom en var positiva för S. devriesei. Bakterienivåerna korrelerade inte till graden av skada. De 4 hästar som hade kraftigast perifer karies saknade S. devriesei-specifika SIgA. Hästar med höga nivåer av total SIgA tenderade att också ha höga nivåer av S. devriesei-specifika SIgA.

Main title:Peripheral cemental caries in horses
Authors:Bengtström, Julia
Supervisor:Wattle, Ove and Wattrang, Eva
Examiner:Holm Forsström, Karin
Series:Examensarbete / Sveriges lantbruksuniversitet, Fakulteten för veterinärmedicin och husdjursvetenskap, Veterinärprogrammet
Volume/Sequential designation:2015:31
Year of Publication:2015
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:VY002 Veterinary Medicine Programme 330 HEC
Department:(VH) > Dept. of Clinical Sciences
Keywords:cementum, caries, horse, equine, Streptococcus devriesei, SIgA
URN:NBN:urn:nbn:se:slu:epsilon-s-5858
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-5858
Subjects:Animal diseases
Language:English
Deposited On:21 Sep 2016 14:55
Metadata Last Modified:21 Sep 2016 14:55

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