A surveillance system for bovine abortion

Thurmond, Mark; Picanso, J. P.

doi:10.1016/0167-5877(90)90021-9

Cited by 44 publications

(22 citation statements)

References 11 publications

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“…The variation among herds can be attributed to differences in the factors affecting late embryonic and foetal loss. A herd effect on pregnancy losses due to managerial factors was previously reported (Thurmond and Picanso 1990, Thompson et al 1994, Forar et al 1996. In the present study nutrition and housing conditions in the herds were similar and there were no statistically significant differences in late embryonic loss and foetal loss rates between them.…”

Section: Discussionsupporting

confidence: 51%

Late embryonic and foetal losses in eight dairy herds in north-east Poland

Barański¹,

Zduńczyk²,

Janowski³

2012

Polish Journal of Veterinary Sciences

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The information about the occurrence of embryonic and fetal losses in dairy herds in Poland is limited. Thus, the objective of this study was to assess the pregnancy loss between days 30 and 45 (late embryonic mortality) and between days 45 and 260 after artificial insemination (AI) (foetal loss). The study was carried out in 8 dairy herds in north-east Poland. In total 954 cows were examined for pregnancy on day 30 after AI using an ultrasound scanner. Cows diagnosed pregnant were re-examined on day 45 and 260 after AI using transrectal palpation. The pregnancy rate on day 30 after AI was 62.0%, after re-examination on day 45 after AI the pregnancy rate was 56.4%. The late embryonic loss rate was on an average 9.1%. The occurrence of late embryonic mortality differed not significantly (p > 0.05) among herds and ranged from 13.1% to 19.3%. The pregnancy rate on day 260 after AI was 53.5%. The average foetal loss after day 45 of pregnancy was 5.0%, ranged between herds from 0 to 9.2% (p > 0.05) and was significantly lower than embryonic loss rate (p < 0.05). The study revealed that in 8 dairy herds in north-east Poland the overall pregnancy loss between days 30 and 260 averaged 13.7% and therefore it is an important factor affecting economic efficiency of dairy production. The foetal loss was less prevalent than the late embryonic loss. Future strategies to minimizing late embryonic loss are needed.

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Section: Discussionsupporting

confidence: 51%

Late embryonic and foetal losses in eight dairy herds in north-east Poland

Barański¹,

Zduńczyk²,

Janowski³

2012

Polish Journal of Veterinary Sciences

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“…It needs to be appreciated that the overall cost of such delay and modified breeding cycle may far exceed the value of the extra milk production for which animals were selected in the first instance. For example, it was estimated that the cost of a pregnancy loss during the early foetal period amounts to US $640 (Thurmond and Picanso 1990). Considering 10% early foetal loss, we could thus calculate that the annual cost to a dairy herd with 100 pregnancies per year could be as high as $6400 [(0.1) (100) (640)].…”

Section: Discussionmentioning

confidence: 99%

Timing of Early Foetal Loss for Single and Twin Pregnancies in Dairy Cattle

López‐Gatius

Santolaria

Yániz

et al. 2004

Reprod Domestic Animals

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The incidence of early foetal loss is increasing under intensive management systems for dairy cattle. The aims of the present study were to determine whether there is any peak period of pregnancy loss during the early foetal period and to evaluate possible differences between single and twin pregnancies. The study population consisted of 1442 pregnant cattle from a single herd. Pregnancy was diagnosed by transrectal ultrasonography between 36 and 42 days after insemination, and then weekly until day 90 of gestation or until pregnancy loss. A total of 1310 cows (90.8%) bore single embryos and 132 (9.2%) carried twins. Pregnancy loss was registered in 139 (9.6%) cows before day 90 of pregnancy: 101 (7.7%) in single and 38 (28.8%) in twin pregnancies. The average time of pregnancy loss for all animals was 58.4 +/- 12.6 days and ranged from 45 to 90 days. Seventy-five per cent of the pregnancy losses were registered between 45 and 60 days of gestation. The average time of pregnancy loss for cows with singletons was 52.1 +/- 4.1 days and ranged from 45 to 61 days and that for those with twins was 75.1 +/- 12.4 days and ranged from 46 to 90 days. Seventy-five per cent of the twin pregnancy losses were registered between 68 and 90 days of gestation. Our data show that the foetal loss in singleton pregnancies occurs earlier than in twin pregnancies. Assessment of normal development of gestation on days 60 and 90 after insemination is suggested.

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“…The cost of an abortion case is between 480 and 700 US dollars (Thurmond and Picanso 1990), and can reach 1200 dollars with treatment and milk discharge costs (Kossaibati and Esslemont 1997). C. abortus is an important septic abortion agent in ruminants, especially in sheep and goats.…”

Section: Discussionmentioning

confidence: 99%

Development of Polymerase Chain Reaction assays with host-specific internal controls for Chlamydophila abortus

Cantekin¹,

Solmaz²,

Ergün³

et al. 2015

Vet. Med. - Czech

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ABSTRACT:Chlamydophila abortus (C. abortus) is one of the most important infectious agents causing abortion in ruminants. The bacterium is obligately intracellular, cannot grow on agar, but it needs cell culture or embryonated eggs for growth. Therefore, culture-independent detection methods such as the polymerase chain reaction are increasingly important and needed. The aim of this study was to develop a polymerase chain reaction assay with an internal control for detection of C. abortus in clinical samples. Using newly-designed two primer sets specific for C. abortus, the polymerase chain reaction assay was first tested with positive and negative control DNA and its sensitivity and specificity were determined. A new polymerase chain reaction protocol was developed by combining the new primer pair sets with bovine (12SM-FW and 12SBT-REV2) and ruminant host-specific primer sets (12S-FW and 12S-REV). In conclusion, the developed polymerase chain reaction assays can potentially be used for direct detection of Chlamydophila abortus in bovine and ruminant samples.

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A surveillance system for bovine abortion

Cited by 44 publications

References 11 publications

Late embryonic and foetal losses in eight dairy herds in north-east Poland

Late embryonic and foetal losses in eight dairy herds in north-east Poland

Timing of Early Foetal Loss for Single and Twin Pregnancies in Dairy Cattle

Development of Polymerase Chain Reaction assays with host-specific internal controls for Chlamydophila abortus

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