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Linear versus sector probe for abdominal pregnancy diagnosis in dogs
The assessment of an early and reliable pregnancy diagnosis in sows is very important for limiting the number of non-productive days in sow herds. Transabdominal ultrasound pregnancy diagnosis has become very popular not only in small animals but also in sows. Which method is the most accurate in this species? An important question!

The aim of the present study was to investigate the accuracy of trans-abdominal ultrasound detection for early pregnancy diagnosis in sows under field conditions.

Particular attention was paid to the time when a reliable diagnosis can be made, and to possible differences between two commonly used types of scanners.

In total, 202 sows from two herds were tested daily with scanners A (linear transducer of 5 MHz) and B (sector transducer of 3.5 MHz) from day 16 until 25 after insemination.

Ninety-three percentage of the sows were pregnant 36 days after insemination.

Using ultrasound, the first pregnancy could be detected already 18 days after insemination.

The sensitivity, specificity and overall accuracy were higher than 95% from day 24 (scanner A) or day 23 (scanner B) post-insemination onwards.

The positive predictive values from day 19 onwards were consistently higher than 95% with both types of scanners, whereas the negative predictive values were consistently low for both scanners during the entire period.

The sensitivity of testing tended to be slightly lower in sows with a litter size of <10 total born piglets, compared to sows with 10 or more piglets.

In conclusion, pregnancy diagnosis in sows using trans-abdominal ultrasound testing can be assessed quickly and reliably under field conditions from day 23 of gestation onwards.

Predictive values of positive test results were high in these herds, whereas those of negative test results were low. This implies that sows with a negative test result early in pregnancy should be retested later.



Source: Maes, D, Dewulf, J, Vanderhaeghe, C, Claerebout, K & de Kruif, A (2006): Accuracy of Trans-abdominal Ultrasound Pregnancy Diagnosis in Sows using a Linear or Sector Probe. In: Reproduction in Domestic Animals 41 (5), 438-443.




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SWINE PRACTICE

Beta hydroxy beta methyl butyrate and the muscle fibre composition in growing pigsmembers
The aim of this recently online published study was to investigate the effects of excess leucine (Leu) vs. its metabolites α‐ketoisocaproate (KIC) and β‐hydroxy‐β‐methyl butyrate (HMB) on Leu metabolism, muscle fibre composition and muscle growth in growing pigs. Thirty‐two pigs with a similar initial weight (9.55 ± 0.19 kg) were fed 1 of 4 diets for 45 days: basal diet, basal diet + 1.25% L‐Leu, basal diet + 1.25% KIC‐Ca, basal diet + 0.62% HMB‐Ca. The results are very promising!

  • L-carnitine as a feed additive in pigs and poultrymembers
  • PCV-3 in pig serum samples from Spainmembers
  • Oral fluid and plasma oxytetracycline concentrations after i.m. administration in pigsmembers
  • Novel highly pathogenic porcine reproductive and respiratory syndrome virus in Chinamembers
  • Calibration of the TonoVet and Tono-Pen Vet tonometers in pigs´ eyesmembers
  • Measurement of serum cobalamin and folate concentrations in pigs with commercially assaysmembers
  • Commercially available immunoassays for serum cobalamin and folate in pigsmembers
  • Ultrasound-guided vessel catheterization in adult pigsmembers
  • Association between porcine cytomegalovirus infection and PMWSmembers
  • Suitable antibiotic therapy to treat swine brucellosismembers
  • Pancuronium versus vecuronium in pigs members
  • Haemodynamic effects of pancuronium and vecuronium in pigsmembers


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