Short communication: Role of Mycoplasma arginini in mastitis caused by Streptococcus dysgalactiae

L. Stipkovits, Maria Somogyi, Balazs Asvanyi, Agnes Toth, Susan Szathmary

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We performed a comparative study on the development of mastitis induced by Mycoplasma arginini or Streptococcus dysgalactiae after challenging the cows. Mycoplasma arginini did not cause any clinical symptoms on its own, resulting in only a transient increase of somatic cell count (SCC; increase ranging from 0.5×106 to 0.8×106 cells/mL) and a slight decrease of milk production (10%) for 5 d. In contrast, Strep. dysgalactiae induced more severe clinical signs in animals and SCC increased to 1.60×106 to 2.11×106 cells/mL for 10 d. In addition, milk production decreased (22.9 to 27.0%) for 10 d. After 3mo (2mo after the first challenge), animals that were challenged previously with M. arginini were rechallenged with Strep. dysgalactiae. Severe clinical mastitis developed, with very high SCC (5.00×106 to 21.5×106 cells/mL), and a very significant reduction of milk production (28.6 to 68.7%), which lasted more than 4wk, was observed. The severe clinical mastitis developed not only in cows inoculated with Strep. dysgalactiae andM. arginini in the same udder quarter but also in cows infected in the quarter previously not challenged with mycoplasma. Cows challenged first with Strep. dysgalactiae and rechallenged with M. arginini 2mo later developed only slight changes in both SCC and milk production, similar to those when the cows were challenged with M. arginini alone. We conclude that M. arginini infection does not cause remarkable mastitis (characterized by decrease in milk production and increase of SCC) but it significantly predisposes animals to infection with Strep. dysgalactiae, leading to severe clinical mastitis.

Original languageEnglish
Pages (from-to)1661-1667
Number of pages7
JournalJournal of Dairy Science
Volume96
Issue number3
DOIs
Publication statusPublished - Mar 2013

Fingerprint

Mycoplasma arginini
Streptococcus dysgalactiae
Mastitis
Mycoplasma
Streptococcus
mastitis
Milk
milk production
cows
Animal Mammary Glands
udder quarters
animals
Infection
cells
somatic cell count
infection
Cell Count
signs and symptoms (animals and humans)

Keywords

  • Challenge
  • Mastitis
  • Mycoplasma arginini
  • Streptococcus dysgalactiae

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Food Science
  • Genetics

Cite this

Short communication : Role of Mycoplasma arginini in mastitis caused by Streptococcus dysgalactiae. / Stipkovits, L.; Somogyi, Maria; Asvanyi, Balazs; Toth, Agnes; Szathmary, Susan.

In: Journal of Dairy Science, Vol. 96, No. 3, 03.2013, p. 1661-1667.

Research output: Contribution to journalArticle

Stipkovits, L. ; Somogyi, Maria ; Asvanyi, Balazs ; Toth, Agnes ; Szathmary, Susan. / Short communication : Role of Mycoplasma arginini in mastitis caused by Streptococcus dysgalactiae. In: Journal of Dairy Science. 2013 ; Vol. 96, No. 3. pp. 1661-1667.
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abstract = "We performed a comparative study on the development of mastitis induced by Mycoplasma arginini or Streptococcus dysgalactiae after challenging the cows. Mycoplasma arginini did not cause any clinical symptoms on its own, resulting in only a transient increase of somatic cell count (SCC; increase ranging from 0.5×106 to 0.8×106 cells/mL) and a slight decrease of milk production (10{\%}) for 5 d. In contrast, Strep. dysgalactiae induced more severe clinical signs in animals and SCC increased to 1.60×106 to 2.11×106 cells/mL for 10 d. In addition, milk production decreased (22.9 to 27.0{\%}) for 10 d. After 3mo (2mo after the first challenge), animals that were challenged previously with M. arginini were rechallenged with Strep. dysgalactiae. Severe clinical mastitis developed, with very high SCC (5.00×106 to 21.5×106 cells/mL), and a very significant reduction of milk production (28.6 to 68.7{\%}), which lasted more than 4wk, was observed. The severe clinical mastitis developed not only in cows inoculated with Strep. dysgalactiae andM. arginini in the same udder quarter but also in cows infected in the quarter previously not challenged with mycoplasma. Cows challenged first with Strep. dysgalactiae and rechallenged with M. arginini 2mo later developed only slight changes in both SCC and milk production, similar to those when the cows were challenged with M. arginini alone. We conclude that M. arginini infection does not cause remarkable mastitis (characterized by decrease in milk production and increase of SCC) but it significantly predisposes animals to infection with Strep. dysgalactiae, leading to severe clinical mastitis.",
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