Slaughterhouse examination of culled sows in commercial pig herds

Jong, Ellen de; Appeltant, Ruth; Cools, An; Beek, Josine; Boyen, Filip; Chiers, Koen; Maes, Dominiek

doi:10.1016/j.livsci.2014.07.001

Cited by 27 publications

(37 citation statements)

References 15 publications

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“…This indicates that the reason for culling could not always be substantiated by the findings of post-mortem examination on the reproductive organs. This is in accordance with a number of earlier studies (Tummaruk et al 2009;de Jong et al 2014). For instance, de Jong et al (2014) found that more than half of the sows culled due to anoestrus had perfectly normal cycling ovaries.…”

Section: Discussionsupporting

confidence: 92%

“…This is in accordance with a number of earlier studies (Tummaruk et al 2009;de Jong et al 2014). For instance, de Jong et al (2014) found that more than half of the sows culled due to anoestrus had perfectly normal cycling ovaries. In some herds, 20 % of sows culled due to no pregnancy appeared to be pregnant (de Jong et al 2014).…”

Section: Discussionsupporting

confidence: 92%

“…For instance, de Jong et al (2014) found that more than half of the sows culled due to anoestrus had perfectly normal cycling ovaries. In some herds, 20 % of sows culled due to no pregnancy appeared to be pregnant (de Jong et al 2014). Tummaruk et al (2009) demonstrated that 52 % of the gilts culled due to anoestrus had normal cycling ovaries.…”

Section: Discussionmentioning

confidence: 99%

“…corpora lutea [CL], corpora haemorrhagica [CH], corpora albicantia [CA] and follicles) was used to determine the stage of the oestrous cycle (Tummaruk et al 2009;de Jong et al 2014). The number of CL was counted, and this was defined as the ovulation number (Tummaruk and Kesdangsakonwut 2014).…”

Section: Gross and Histological Examinationmentioning

confidence: 99%

“…The culling of gilts and young sows has become a major concern in the modern swine industry for not only the longevity of sows but also animal welfare issues. Endometritis, generally known as vaginal discharge syndrome, in gilts and sows causes a number of clinically reproductive failures, including low farrowing rate, and anoestrous de Jong et al 2014). In the gilts' and sows' endometrium, a local immunity is generated by various types of leukocyte subpopulations (Kaeoket et al 2002;Teamsuwan et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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Porcine circovirus type 2 DNA detection in the uterine tissue of gilts in relation to endometritis and the number of leukocyte subsets in the endometrium

et al. 2015

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The aim of the present study was to determine the prevalence of porcine circovirus type 2 (PCV2) DNA-positive uterine tissues in gilts in relation to endometritis and the number of leukocyte subsets in the endometrium. Uterine tissues from 32 Landrace × Yorkshire gilts were investigated. The gilts were classified according to both macroscopic and microscopic examination of the endometrium into three groups: normal (n=13), acute endometritis (n=11) and chronic endometritis (n=8). Reproductive cycle was defined according to the ovarian appearance as follicular, luteal and inactive phases. PCV2 DNA was determined using polymerase chain reaction. The number of leukocyte subsets, including lymphocytes, neutrophils, eosinophils, macrophages and plasma cells, in the epithelium, subepithelium and glandular layer of the endometrium was carefully evaluated. It was found that PCV2 DNA was detected in 34.4 % (11/32) of the uteri. According to the lesion of endometritis, PCV2 DNA was detected in 53.9 % (7/13) of normal uteri, 36.4 % (4/11) of acute endometritis, and 0.0 % (0/8) of chronic endometritis (P= 0.038). The PCV2 DNA was detected in 55.0 % (5/9), 20.0 % (4/20) and 66.7 % (2/3) of tissues in follicular, luteal and inactive phases, respectively (P=0.081). Leukocyte subsets in all tissue layers of the endometrium did not differ significantly between the uterine tissues with and without PCV2 DNA detection (P>0.05). These findings indicate that PCV2 exists in the reproductive organs of the gilts. The PCV2 persistence can be a risk factor for transmission of the virus to negative sows and potentially cause reproductive failures.Nevertheless, the influence of PCV2 natural infection on the reproductive function of gilt still requires further investigation.

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Section: Discussionsupporting

confidence: 92%