Hostname: page-component-745bb68f8f-hvd4g Total loading time: 0 Render date: 2025-02-05T10:45:51.326Z Has data issue: false hasContentIssue false
  • English
  • Français

280. The relationship of methods of bacteriological examination to the eradication and control of mastitis (Streptococcus agalactiae): I. The use of an enrichment technique in revealing streptococcal infections of the cow's udder: II. Streptococcus agalactiae infection in heifers

Published online by Cambridge University Press:  01 June 2009

A. T. R. Mattick ,
P. M. F. Shattock  and
M. Moreira Jacob
A. T. R. Mattick
Affiliation:
National Institute for Research in Dairying, University of Reading
P. M. F. Shattock
Affiliation:
National Institute for Research in Dairying, University of Reading
M. Moreira Jacob
Affiliation:
National Institute for Research in Dairying, University of Reading
Get access Rights & Permissions [Opens in a new window]

Extract

In the course of attempts on a field scale to eradicate or control Str. agalactiae infections, comparisons of the efficiency of several bacteriological methods have been made. It has been found that by using a method of enrichment, many cases of infection with small numbers of Str. agalactiae can be demonstrated in animals which give negative results by other methods. The frequency of examination has been shown to have an important influence upon the number of positive cases discovered.

Light infections have been, proved to persist for long periods. Light infections with Str. dysgalactiae and Str. uberis have also been found in many cases. Str. agalactiae has been shown to be present in no less than 21 % of animals in their first lactation and 4·5 % of heifers were found to harbour this organism whilst in isolation before joining the herd. The bearing of these findings on the theory of contagion in Str. agalactiae infections has been discussed.

Type
Original Articles
Information
Journal of Dairy Research , Volume 12 , Issue 2 , May 1941 , pp. 139 - 154
Copyright
Copyright © Proprietors of Journal of Dairy Research 1941

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

(1) (1941). Vet. Rec. 53, 3.Google Scholar
(2)Stableforth, A. W. (1938). Agric. Progr. 15, 8.Google Scholar
(3)Munch-Petersen, E. (1938). Bovine Mastitis. Imperial Bureau of Animal Health, Review Series, No. 1.Google Scholar
(4)Watts, P. S. (1940). J. Dairy Res. 11, 316.CrossRefGoogle Scholar
(5)Minett, F. C., Stableforth, A. W. & Edwards, S. J. (1933). J. comp. Path. 46, 131.CrossRefGoogle Scholar
(6)Stableforth, A. W., Edwards, S. J. & Minett, F. C. (1935). J. comp. Path. 48, 300.CrossRefGoogle Scholar
(7)Bull, L. B., Murnane, D., Munch-Petersen, E., MacLean, Jean D. & Clark, Stephanie E. R. (1940). Bull. Coun. sci. industr. Res. Aust. no. 134.Google Scholar
(8)Hucker, G. J. & Harrison, E. S. (1937). Tech. Bull. N. Y. St. agric. Exp. Sta. no. 246.Google Scholar
(9)Minett, F. C. (1939). J. comp. Path. 52, 266.CrossRefGoogle Scholar
(10)Steck, W. (1932). Arch. Tierheilk. 64, 300.Google Scholar
(11)Edwards, S. J. (1933). J. comp. Path. 46, 211.CrossRefGoogle Scholar
(12)Edwards, S. J. (1938). J. comp. Path. 51, 250.CrossRefGoogle Scholar
(13)Hotis, R. P. & Miller, W. T. (1936). Circ. U.S. Dep. Agric. no. 400.Google Scholar
(14)McCulloch, E. C. & Fuller, S. A. (1939). J. Bact. 38, 447.CrossRefGoogle Scholar
(15)Ayers, S. H. & Rupp, P. (1922). J. infect. Dis. 30, 388.CrossRefGoogle Scholar
(16)Minett, F. C., Stableforth, A. W. (1931). J. comp. Path. 44, 114.CrossRefGoogle Scholar
(17)Lancefield, R. C. (1933). J. exp. Med. 57, 571.CrossRefGoogle Scholar
(18)Little, R.B. (1940). J. Amer. vet. med. Ass. 97, 212.Google Scholar
(19)Davis, J. G., McClemont, J. & Rogers, H. J. (1939). J. Dairy Res. 10, 60.Google Scholar
(20)Stableforth, A. W. (1938). J. Path. Bad. 46, 21.CrossRefGoogle Scholar
(21)Davis, J. G. & McClemont, J. (1939). J. Dairy Res. 10, 81.Google Scholar
(22)Sanders, D. A. (1940). J. Amer. vet. med. Ass. 97, 120.Google Scholar
(23)Sanders, D. A. (1940). J. Amer. vet. med. Ass. 97, 306.Google Scholar
(24)Mattick, A. T. R. & Hoy, W. A. (1939). Proc. Soc. agric. Bact. (Abstr.) 27.Google Scholar
(25)Hucker, G. J. (1937). Tech. Bull. N.Y. St. agric. Exp. Sta. no. 241.Google Scholar
(26)Mattick, A. T. R. & Harrison, J. (1941). Unpublished results.Google Scholar
(27)Mattick, A. T. R. (1939). Camb. Univ. agric. Soc. Mag. 6, 24.Google Scholar