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Swine genetics and reproduction
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Introduction: Aujeszky disease is still a major pathogen causing respiratory problem and reproduction failure in Taiwanese swine herds. Though eradication program in breeder farms is in progress, no standard vaccination program recommended for commercial farms. Recently Area Regional Control (ARC) became popular for its benefit of diseases control in an area level. In this study, we report a survey on sero-prevalence of Aujeszky disease in a small swine production group in east...
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Introduction: In mated sows, corpus luteum (CL) function is important for the establishment of the pregnancy. The maximum CL size is established at day 8 - 9 of the pregnancy and maintained autonomous until day 12. Then, CL maintenance will depend on hormones such as LH and PGF2α. PGF2α is released from the endometrium at day 14 and triggers CL regression. This regression can be prevented in pregnant sows due to estradiol production from the attaching conceptuses;...
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Introduction: The genetic selection for increased litter size has resulted in a disproportionate increase in ovulation rate (OR). A higher OR was linearly related with decreased placental length at day 35 of pregnancy, which could inhibit foetal growth during further pregnancy (Da Silva et al., 2016). As increased litter size has resulted in a decreased piglet birth weight and increased within litter birth weight variation, we investigated the relationship between OR and litter...
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Introduction: Piglet mortality causes welfare challenges and economic losses in commercial pig production. Crushing is the most common cause of death, but as an empty stomach is frequently found in crushed piglets, starvation is often a precursor to be crushed. Piglets are born with a limited resource of energy in the form of glycogen and with very little body fat. Thus an abundant amount of sow colostrum and later sows milk is vital for the survival of the piglets. In...
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Introduction: Benchmarking has been widely practiced worldwide in the swine industry to improve farm management and productivity. Best practice benchmarking is defined as identifying those practices and processes associated with superior efficiency and performance. In the best-practice benchmarking for breeding farms, measurements in high-performing and ordinary farms have been used to provide values of target performance, using the 10th or 25th upper percentile of the...
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Having more piglets at birth is important, and it is even more crucial to keep them alive and healthy until weaning. The challenge with hyperprolific sows is that they produce high number of piglets with a large variety of weaning weights. It is particularly those piglets with lower body weights that...
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1. Introduction Artificial insemination (AI) in modern pig reproduction requires liquid-stored extended semen. Extenders provide sperm with nutrients to maintain metabolic processes, prevent cold shock, control osmotic pressure an pH, and antibiotics present in extender inhibit bacterial growth. Despiste the substantial improvements made on extender formulations in recent years. the quality of stored sperm decreases over time primarily due to the increased damage the plasma...
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Introduction The continuous increase in the area cultivated with genetically modified (GM) crops [1] and consequently their ubiquitous presence makes it increasingly difficult for consumers to avoid GM products. However, the dispute regarding the safety of GM crops is far from resolved [2] and consumer opinions vary over time and from country to country [3,4]. Bt MON810 maize is resistant to attack by Lepidopterae pests, as it expresses the Cry1Ab protein [5]. This protein is...
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Introduction: Castration procedure is a painful method which reduces welfare and could reduce performance. Some trials demonstrated that meloxicam prior castration procedure in piglets could reduce acute pain decreasing behaviors relates to a lack of welfare. Any study using infrared thermography (IT) was found to evaluate the inflammatory process after castration procedure in piglets. This study aimed to evaluate inflammatory process using IT associated with behavior and...
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Introduction: Recent research has demonstrated that maternal dietary supplementation of LactoShield® (seaweed extract) had beneficial effects on the growth performance, immune status and gastrointestinal health of weanling pigs. The primary objective of the present study was to evaluate the effect of maternal dietary LactoShield® inclusion on the reproductive performance of sows and the piglet during the suckling period. Materials and Methods: The farm...
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Introduction Pigs suffer high rates of embryonic mortality, especially during the peri-implantation period of pregnancy [1, 2] when embryos elongate rapidly, signal for pregnancy recognition, and attach to the uterine wall [3, 4]. Maternal nutrition plays an important role in the development and subsequent survival of conceptuses (embryo/fetus and its extra-embryonic membranes), especially the maternal dietary intake of amino acids (AAs) [5–7]. Both low and high...
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Marisol Castillo, PhD, Senior Manager, Global Swine Solutions at Novus International talks about The Scale Up™ program, nutritions solutions that maximize pounds of pork and each animal's genetic potential at every life stage.
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Background Information Major changes in the swine industry during the last quarter century have significantly influenced vitamin nutrition of swine. Improvements in the efficiency of swine production system through selection has necessitated a reappraisal of dietary requirements of vitamins. ...
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1. Introduction Tissue-specific stem cells have the potential to self-renew or differentiate into mature cells, contributing to tissue growth and homeostasis. Muscle specific stem cells, satellite cells, maintain the ability to self-renew or differentiate and are required for post-natal muscle growth and repair [1–3]. The use of novel gene sequencing technology in the investigation of the genomic regulation of satellite cell fate has provided insight into how the satellite...
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Johannes Kauffold (University of Leipzig) explained the impact of Zearalenone and DON, during IPVS2022 in Rio de Janeiro, Brazil....
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Johannes Kauffold (University of Leipzig) talked about conception rate and the way to use data to understand what happens on the farm, during IPVS2022 in Rio de Janeiro, Brazil....
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I am THANGAVEL RANGARAJ from Royal Swine Genetics, India. We have High Tech Elevated Pig Breeding. Also, we are the Indian Distributor for Rotecna SA - Spain, Schils BV - Netherlands, Mervue laboratories - Ireland, Renco Corporation - USA. We are interested to Start BOAR STATION in India. Can you any one Experts in this field, please guide, Supports and even Supply the required Quality Equipment, Consumables. Also we required Training for Extraction, Mixing and Injection. Even we...
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Introduction Molecular serotyping and LS-PCR are valuable and practical tools for Glaeserella parasuis characterization (1, 2). Early in 2020, and due to the forced postpandemic closure, several swine production systems in Peru reported clinical cases of G. parasuis, and a total of sixty-eight qPCR-positive microbiological isolates of clinical cases were obtained over two years. The objective of this study was to identify the circulating serotypes,...
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Bruno Silva (Universidade Federal de Minas Gerais) explains the need to adapt feeding programs to the characteristics of young and adult sows, during IPVS2022 in Rio de Janeiro, Brazil....
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John Morris Fairbrother (Université de Montréal) discussed the use of these methods in his research on Escherichia coli in pigs, during IPVS2022 in Rio de Janeiro, Brazil....
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