For the first time in Greece, we investigated the prevalence of Coxiella burnetii antibodies in milk and sera from dairy cattle herds located at central and northern parts of the country. Eighty herds were initially voluntary enrolled in the study and a bulk milk sample from each farm was assayed...

Energy balance was assessed during the first 13 weeks postpartum in 497 primiparous Holstein cows and the relationship with reproductive performance was investigated. A significant association was observed between body condition score (BCS) and a number of reproductive traits, including conception...

Reproductive efficiency in the dairy herd is the most important factor for its economic success and a major concern for dairy farmers when using artificial insemination (AI) or natural service (NS). Our objectives were to estimate, compare and analyse the costs associated with breeding cattle by...

92 Friesian cows were used to determine physical properties of cervical mucus collected during normal oestrus and induced oestrus between September 1995 and December 1996 at 5 farms in Northern Greece. Oestrus was induced using either progesterone (P₄) releasing intravaginal devices (PRID,...

The objective of this field trial was to compare the odds of pregnancy at 25 days (P25) and at 60 days (P60), of embryonic death (ED) between 25 and 60 days, and of non-pregnant cows returning to heat 20-25 days after artificial insemination (AI). Three fixed-time insemination protocols involving...

In a 2-year study, run as part of the artificial insemination programme in Thessaloniki, Greece, milk progesterone and oestrone sulphate concentrations were used to monitor and assess pregnancy in lactating Holstein cows. Milk samples were taken on the day of insemination (day 0), day 21, day 42...

Papers abstracted appear in the appropriate sections of this issue of A.B.A. AFIFI, Y. A. Genetical and some environmental influences affecting the level of leukocyte counts in the milk of cows: 747-761. [Eng.]BAIER, W., and WALSER, K. Competition on animal reproduction and milk production:...

The results are reported of an enquiry carried out in 1967 in which information on A.I. in livestock was obtained from 24 countries in Europe, 10 in the Americas, 6 in Asia, 3 in Africa and 2 in Oceania. For various reasons, not all the data were equally reliable or complete. Data are tabulated for ...

A total of 79 Jersey cows, obtained from the Breedania organization (Denmark), were imported in 1960 to the Kastoria area. They were allocated to 69 small farmers (l or 2 to each) in 12 villages. The importation showed that there were no problems of acclimatisation. In the first year milk yields...