Antistreptolysin O titer in horses.
Abstract: Antistreptolysin O (ASO) titers were determined in the sera of 532 horses from stud farms and 436 working horses from small farms. A statistically significant correlation was seen between the ASO titer and the age of the horses. There was a significant difference between mean ASO titer in horses 0-2 years and horses 2-10 years In horses older than 10 years the titer was significantly higher than mean ASO titer for the group. Twenty four of 30 horses in which ASO titer was higher or equal to 80 I.U. had histories which suggested that streptococcal infection had occurred. Clinical and bacteriological examination showed that in all examined stud farms cases of Streptococcus C infection was noted during the 2 years before serum was collected. Streptococcus C was isolated usually from horses which had low ASO titer. Our results are in agreement with the suggestion that S. zooepidemicus infections increase the ASO titer in serum of horses.
Publication Date: 1986-01-01 PubMed ID: 2426927
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- Journal Article
Summary
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This research studied the correlation between Antistreptolysin O (ASO) titer levels and the age of horses, finding a significant association between them. It also found that horses suspected of streptococcal infection typically had higher ASO titer levels, and there were cases of Streptococcus C infection in all stud farms examined.
Understanding Antistreptolysin O (ASO) titer in horses
- Antistreptolysin O (ASO) is an antibody that the body produces in response to an infection caused by group A streptococcus bacteria, such as Streptococcus C.
- This research determined ASO titer levels in the blood serum of 968 horses, of which 532 were stud farm horses while 436 were working horses from smaller farms.
Correlation Between ASO Titer and Age of Horses
- A significant correlation was found between the levels of ASO and the age of horses. This suggests that as horses age, their ASO titer levels tend to change, likely due to their immune response to bacterial infections.
- It was observed that a big difference existed between the mean ASO titer in young horses (0-2 years) and those between 2-10 years.
- For horses older than 10 years, the ASO titer was significantly higher than the group mean, implying that older horses produce more ASO antibodies in response to streptococcal infections.
ASO Titer and Streptococcal Infections in Horses
- Of the 30 horses with an ASO titer level of 80 I.U or above, 24 had a history suggestive of streptococcal infection. This supports the contention that a greater presence of ASO antibodies indicates a likely occurrence of a streptococcal infection.
- Further clinical and bacteriological examinations revealed that all studied stud farms had cases of Streptococcus C infection in the two years before the blood serum samples were collected.
- Interestingly, Streptococcus C was usually isolated from horses that had a low ASO titer, suggesting that horses having a low ASO titer may not have an effective immune response against Streptococcus C.
Conclusions from the Study
- This research mirrors previous suggestions that infections from S. zooepidemicus, a group A streptococcal bacteria, increase the ASO titer in the serum of horses. This implies that measuring ASO titer can serve as an indicator for Streptococcus infections in horses.
Cite This Article
APA
Romanowska D, Szynkiewicz Z, Rita J.
(1986).
Antistreptolysin O titer in horses.
Acta Microbiol Pol, 35(1-2), 91-95.
Publication
Researcher Affiliations
MeSH Terms
- Abortion, Veterinary
- Aging
- Animals
- Antistreptolysin / analysis
- Female
- Fetus
- Horses / blood
- Pregnancy
- Streptococcus / isolation & purification
Citations
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