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Two hundred cases of mild clinical mastitis were treated on two farms using two intramammary preparations in quick release bases. One preparation contained penicillin and streptomycin, the other contained lincomycin, neomycin and prednisolone. Fifty-eight per cent of cases were clinically and bacteriologically cured using the first preparation; and 61 per cent of cases, with a similar range of organisms, using the second. The main infections were Streptococcus uberis and coliform; all but three of the infections were sensitive in vitro to one or both of the antibiotics in the preparations. On the farm with 100 cows, 69 per cent of cases were cured, while only 52 per cent were cured on the farm with 300 cows. It is suggested that it is more difficult to detect and treat cases in the larger herd. A number of reservations about the interpretation of the results are discussed.
Vet Rec 1975 Feb 08
PMID:Treatment of clinical mastitis: two intramammary formulations compared. 4 8

In August 1975 an outbreak of C pyogenes mastitis occurred involving 18 heifer calves at the National Institute for Research in Dairying. This paper describes the outbreak which affected animals varying in age from five to 22 months. Fourteen of the cases (77%) were among calves less than 10 months old. The advisability of using fly control measures among young stock in the summer months is discussed.
Vet Rec 1977 May 28
PMID:Corynebacterium pyogenes mastitis among heifer calves. 32 74

During the autumn/winter of 1976, a study was made of a severe mastitis outbreak which occurred in a herd of 96 cows. Forty-four cows and 61 quarters were clinically infected with new infections between September and mid-December. Escherichia coli was isolated in 84 per cent of clinical samples submitted for bacteriological examination.
Vet Rec 1979 Feb 10
PMID:A three-month study of environmental mastitis in a dairy herd. 37 77

Daily monitoring of milk over a 120-day period for bacteria and neutrophil counts revealed that following experimental E coli mastitis, five out of 28 infections resulted in the development of a long continued and recurring condition. Intermittent periods of acute inflammation were observed in the gland, pyrexia was noted, and if bacteria were isolated they were always of the same serotype as the original infecting strain. Failure to isolate bacteria and the lack of overt inflammation during periods of remission suggested that the bacteria were not in the gland cistern but within gland tissue. In one animal antibiotic therapy with a drug which was active in vitro was ineffective in vivo. However another antibiotic proved effective.
Vet Rec 1979 Sep 29
PMID:Recurrent coliform mastitis in the dairy cow. 39 Aug 47

The importance of fly infestation in the transmission of disease and in the loss of production through "fly worry" to meat and milk producing animals is reviewed. As well as being confirmed disseminators of certain enteric diseases of man, eg, cholera, salmonellosis and colienteritis, flies have also been implicated in the transmission of mastitis and certain ophthalmic infections, principally keratoconjunctivitis in cattle. "Fly worry, particularly from biting flies such as Stomoxys calcitrans and Haematobia irritans, has been shown to have an adverse effect on meat and milk production since fly control greatly increases yields.
Vet Rec 1979 Oct 13
PMID:The epidemiological and economic importance of fly infestation of meat and milk producing animals in Europe. 55 24

An outbreak of clinical mastitis is described in which 75 cows of a herd of 200 Friesian cows were affected in one or more quarters over a period of three months. Sixty animals failed to return to normal despite various intramammary and systemic antibiotic treatments. Heifers, dry cows and lactating animals were affected. The milk of 15 out of 53 animals tested yielded mixed cultures of Mycoplasma bovigenitalium and Acholeplasma laidlawii. Thirteen of 34 sera showed evidence of antibodies to A laidlawii.
Vet Rec 1978 Aug 12
PMID:A severe outbreak of bovine mastitis assoicated with Mycoplasma bovigenitalium and Acholeplasma laidlawii. 69 53

Observations were made on 249 first or second calf heifers in which mastitis had been diagnosed in a mammary quarter which was opposite a normal quarter. Cell counts were made on the milk from each quarter and the cows were divided into three groups with the infected quarters classed according to the cell count. The infected quarters gave lower yields of milk with lower fat, solids-not-fat (SNF) and protein percentages than the opposite normal quarters in all three groups, but the differences between the means were only significant in yield and fat and SNF contents in the two groups with cell counts of over 500,000 per ml. In 175 animals the numbers and diameters of the fat globules were measured. The only significant reduction was in the globule numbers in the cows with from 1 to 2 million globules per ml of milk.
Vet Rec 1978 Oct 28
PMID:Cell counts and composition of bovine milk. 72 3

Treatment of pregnant sows with 175 microgram of cloprostenol achieved efficient synchronisation of farrowing; 93% of treated animals commenced farrowing between 20 and 30 hours and 82% between 24 +/- 4 hours after injection. Duration of farrowing and weights of piglets at birth and weaning were not significantly affected by treatment. There was no harmful effect on piglet viability up to weaning and treated sows returned to oestrus within the expected time after weaning. There was a higher incidence of the mastitis-metritis-agalactia syndrome in control sows. The implications of these findings on the management of commercial pig farms is discussed.
Vet Rec 1978 Nov 18
PMID:Induction of farrowing with cloprostenol on a commercial pig breeding farm in Yugoslavia. 74 6

In a two-year study of the incidence of subclinical mastitis in two beef suckler herds over 2400 quarter milk samples from 180 cows were examined. Somatic cell counts and total bacterial counts were carried out and infecting organisms were isolated on sheep blood agar. Results of these tests indicated that: (a) in spite of extremely dirty udders, fewer contaminants were found in the suckler cow milk samples than in a group of over 1700 samples from typical dairy herds; (b) 18 per cent of all quarter milk samples were infected; (c) 67 per cent of all infections were due to staphylococci and 20 per cent to streptococci; (d) 56 per cent of staphylococcal infections were associated with cell counts less than 500,000 per ml compared with 39 per cent of other infections; (e) 70 per cent of samples had somatic cell counts less than 500,000 per ml. (f) 20 per cent of samples had somatic cell counts over 1 million per ml; (g) only 36 per cent of samples with cell counts over 1 million per ml were associated with udder infections; (h) high cell counts and udder infections were more frequent in early than in mid-lactation. Due to a shortage of animals in the late lactation little evidence was available to support the contention that cell counts rise and the numbers of infected quarters increase towards the end of lactation.
Vet Rec 1975 May 17
PMID:Subclinical mastitis in suckler cows. 80 19

An outbreak of mastitis involving approximately 70 out of 140 cows over a two-month period is described. Common mastitis pathogens were not incriminated. Leptospires belonging to the Hebdomadis serogroup were isolated from the milk of three out of five cows and the blood of two of those cows.
Vet Rec 1976 Nov 06
PMID:Bovine leptospirosis: infection by the Hebdomadis serogroup and mastitis. 99 78


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