Small Pig Research Articles

The Effect of Innovation Application on the Competitiveness of Small Pig Farm in Mekong Delta, Vietnam

The growth in Vietnamese consumption and development has led to the expansion of the pig sector and increased competition from other markets. The study included 260 small-scale pig producers selected through a random sampling method. Multiple regression analysis was conducted to examine the impact of (1) social profiles on innovations at pig farms and (2) innovations on the competitiveness at pig farms. The findings revealed that predominantly male farmers, with an average age of 50 and a mean experience of 10 years. A total of 60% did not utilize new innovations for production, although they did have access to knowledge on the pig market. The survey found that production innovations received the greatest ranking compared to other innovations while market innovation were the lowest one. About 70% of farms exhibited a high level of competitiveness, while no farms were found to have a poor level of competitiveness. The study observed that gender, education, occupation, experience, and pig units affected innovation scores. Enhancing the perception of market innovation and organizational innovation leads to a higher degree of competitiveness for farmers. It can be concluded that competitiveness is influenced by innovations, and their farms were competitive based on self-evaluation. Keywords: Pig farming, innovation, competitiveness, sustainable development, social demographics, farm management.

Short communication: Including genomic information increases accuracy of breeding value estimation in a small outdoor organic pig population

Short communication: Including genomic information increases accuracy of breeding value estimation in a small outdoor organic pig population

Optimal Combination of Different Selection and Mating Strategies on Exploiting Genetic Diversity and Genetic Gain in Small Pig Conservation Populations.

Both selection and mating systems are essential tools for breeders to conserve the genetic variance and improve the performance of livestock animals. How to effectively balance the genetic gain and inbreeding has always been an important issue in quantitative genetics research. In this study, a total of 11 selection methods, including random and truncation selection, six conventional selection methods, three different optimal contribution selection (OCS) methods and three mating strategies including random mating, minimum-coancestry mating based on pedigree (MCPed) and genomic information (MCmarker), were performed using stochastic simulations. The long-term effects of different combinations of selection and mating strategies on the genetic gain, the rate of inbreeding and genetic diversity in the small-scale pig conservation populations were investigated. The results showed that different strategies of selection and mating methods had different effects on genetic gain and inbreeding rate. For maintaining additive genetic variance, the optimal strategy was random selection with random mating, followed by SIREhalf-DAMfullRandom selection (which means selecting dams randomly from each full-sib family) and random mating. For mainting the number of common ancestors, the optimal strategy was SIREhalf-DAMfull selection (which means selecting dams with the highest estimated breeding value within each full-sib family) and random mating, followed by SIREhalf-DAMfullRandom selection and random mating, OCS and MCPed mating. For genetic diversity metrics, taking He and Ho as an example, the optimal strategy was GOCS (optimal contribution selection based on genomic information) with MCmarker mating. For genetic gain, the optimal strategy was truncation selection and MCmarker mating, followed by POCS (optimal contribution selection based on pedigree information) and MCmarker mating, truncation selection and MCPed mating. For the rate of inbreeding, the optimal strategy was SIREhalf-DAMfull selection and MCPed mating. Our findings can help breeding managers and farmers choose a more suitable and sustainable strategy for maintaining the genetic diversity and improving the genetic gain of local pig breeds.

Effect of Longer Pre-Starter Diet Allowance on Post-Weaning Performance of Lightweight Piglets.

First-phase diets are formulated to help pigs reach a target body weight before switching to a more affordable diet. However, these transitions typically take place on a fixed schedule, which may disadvantage low-body-weight piglets due to their underdeveloped digestive systems and limited feed intake capacity. This study examined the effects of offering low-body-weight (BW) pigs a pre-starter diet until they reached a target BW on growth performance and BW variability. A total of 528 pigs ([Landrace × Yorkshire] × Pietrain), weaned at day 21, representing the smallest 50% of their batch, were divided into medium (5.35 ± 0.31 kg) and small (3.97 ± 0.21 kg) groups based on weaning BW. Pigs received a pre-starter diet either for 10 days (FIXED) or until they reached a target BW of 7.9 kg (TBW), followed by a starter feed. Growth performance between the TBW and fixed strategies was similar over the 36-day period. Overall, mortality was higher in small pigs, though small pigs fed using the fixed strategy showed higher mortality than the rest of the groups between days 10 and 36. This study concludes that offering a pre-starter diet based on target BW, instead of a fixed time, did not significantly improve growth performance or batch uniformity but reduced mortality in small pigs from days 10 to 36.

Comprehensive Assessment of Animal Welfare Standards in Small Pig Farms of Assam

Comprehensive Assessment of Animal Welfare Standards in Small Pig Farms of Assam

Novel Specifications Regarding Biogas Production from Agriengineering Activities in Romania

This study centers on examining the carbon/nitrogen (C/N) ratio and metal levels in various batches of manure and their potential impact on biogas production through anaerobic fermentation. A novel aspect of this research involves the utilization of nine distinct batches sourced exclusively from livestock manure found in Romanian farms, without mixing with other potential substrates. At present, the farms are not harvesting manure for energy, but they are keen to invest in biogas production in the future as a necessary step towards renewable energy in a circular economy and a bio-waste management model. As a general conclusion that is resulting, it is shown that both the C/N ratio and the content of heavy metals in animal manure must be known when dealing with the animal manure fermentation process, especially when aiming for biogas production. The C/N ratio in the analyzed samples ranges from 6.7 to 30.2. While the ideal ratio is often considered 20–30, good methane production can occur outside this range, as seen in Sample B (small pig farm), with a C/N ratio of 13.8, proving the highest methane output. This shows that the C/N ratio is important but not the only factor influencing biogas generation. The metal content in the manure samples is similar to other studies, with potassium (K) ranging from 1.64% to 8.96%. Calcium (Ca) and K are the main metals found, posing little concern. The variation in values is linked to feed recipes. Monitoring heavy metals is crucial not only for biogas production but also for the safe use of animal manure as fertilizer, as soil contamination limits must be continuously supervised. The results are also valuable for the management of waste used as fertilizer in agricultural fields in accordance with EU law.

Machine Learning-based Prediction of African Swine Fever (ASF) in Pigs

African Swine Fever (ASF) is a contiguous viral disease of the pig with serious economic threats to the pork industry. Early identification of ASF infection is important to support sustainable developments in the ASF industry. There is also a need for a solution to identify the ASF infection as early as possible based on apparent symptoms of ASF to screen the infected animals, that are not targeted in the existing literature. Many machine learning (ML) solutions have been proposed in recent years for the prediction and identification of human, animal, and plant diseases. To deal with ASF in pigs ML-assisted model is proposed for the early identification of ASF infection without medical diagnosis and expert opinion. The data regarding apparent symptoms are collected from Chinese small pig farms. The loss of appetite, weakness, diarrhea, vomiting, coughing, skin redness, and breathing difficulty levels are taken as major apparent symptoms of ASF infection. Moreover, different ML models are also evaluated for their performance in the prediction of ASF infection based on selected apparent symptoms of ASF infection. In this regard, Support Vector Machine (SVM), K-Nearest Neighbor (k-NN), Decision Tree (DT), Random Forests (RF), and Gaussian Naïve Bayes ML models are evaluated for ASF infection prediction. The implementation of the proposed solution reveals that the GNB model is more accurate as compared to the other evaluated models for the identification of ASF infection from the apparent ASF symptoms in infected pig animals, with 94.31\% accuracy. The proposed solution would be very effective in the early screening of ASF-infected pig animals without medical diagnosis and expert judgment.

Subsistence Strategies of the Sarmatians in the Central Region of the Carpathian Basin in the fourth–fifth centuries AD

ABSTRACT The Carpathian Basin witnessed several migration events throughout its history. The plains between the Danube and Tisza Rivers, and those stretching east from the Tisza gave home to groups under the umbrella demonym ‘Sarmatian’ from as early as the first century AD. It has been hypothesised that the subsistence strategy of these populations was influenced by their traditions and the knowledge of the conquered indigenous peoples. This paper presents the archaeobotanical and the archaeozoological results of a fourth–fifth century Sarmatian settlement, and delineates a complex view of its subsistence strategies. The results show that the main vegetable pillar of subsistence was cereals. However, cereal consumption did not seem to be uniform across Sarmatian sites, with differences in the cereal crops identified. The appearance of grapevine might be considered as evidence of Roman influences. Despite the diverse environmental setting, gathered wild plants were not a significant part of everyday diet. The local subsistence strategy was also characterised by the dominance of cattle, followed by other small ruminants and pigs. The presence of wild terrestrial and aquatic species – collected or hunted – in the close proximity of the village could also be proved, suggesting intensive exploitation of the quite diverse environment.

Análisis de Componentes Principales de Buenas Prácticas Ganaderas en la producción porcícola: el caso de pequeños porcicultores en Ibagué, Colombia

Good livestock practices were evaluated in 25 production systems of small pig farmers in Ibagué (Tolima, Colombia) to measure the conditions of biosafety, facilities, animal health, feeding and administrative management based on the ICA-Colombia resolutions for pig production systems using principal component analysis and clustering. Information was collected on 585 aspects in 52 variables. The results showed that 100% of the producers do not comply with the minimum biosafety standards that a farm must have to be safe, suitable and competitive, which does not allow them to obtain a certification of good livestock practices in pig production. The principal component analysis identified the aspects with the greatest impact that required improvement. The «technical component» was the most relevant, with 58% of the non-conformities, related to sanitary management, biosafety, facilities and feeding. The second component, «Comprehensive Management», with 8% of the non-conformities, with the variables waste management, planning, management, biosafety and feeding. Additionally, three types of farms were identified: Type A (12%), which showed greater biosecurity, better selection and origin of animals, and greater impact on natural resources; Type B (40%), characterized by good feeding management, better work and animal environment, less administrative management and high impact on natural resources; and Type C (48%), with lower impact on natural resources, lower administrative management and feeding problems. In conclusion, principal component analysis turned out to be a useful tool to identify key areas of improvement in backyard pig farms with up to three breeding females and 10 fattening pigs, aiming to promote good practices and achieve adequate standards in pig production.

Livestock-associated spatial risk factors for human salmonellosis and campylobacteriosis.

Most human infections with non-typhoid Salmonella (NTS) or Campylobacter are zoonotic in nature and acquired though consumption of contaminated food of mainly animal origin. However, individuals may also acquire salmonellosis or campylobacteriosis through non-foodborne transmission pathways, such as those mediated by the environment. This emphasizes the need to consider both direct and indirect exposure to livestock sources as a possible transmission route for NTS and Campylobacter. Therefore, this study aimed at assessing whether salmonellosis and campylobacteriosis incidence is spatially associated with exposure to livestock (i.e. small ruminants, dairy cows, veal calves, laying hens, broiler chickens and pigs) in the Netherlands for the years 2007-2019 and 2014-2019 respectively. Risk factors (population-weighted number of animals) and their population attributable fractions were determined using a Poisson regression model with a log-link function fitted using integrated nested Laplace approximation. The analyses were performed for different hexagonal sizes (90, 50, 25 and 10 km2) and accounted for geographical coverage of the diagnostic laboratory catchment areas. Moreover, serological data were used to look into the possible effects of acquired immunity due to repeated exposure to the pathogen through the environment that would potentially hinder the analyses based on the incidence of reported cases. A linear mixed-effects model was then fitted where the postal code areas were included as a random effect. Livestock was not consistently significantly associated with acquiring salmonellosis or campylobacteriosis in the Netherlands. Results showed that living in livestock-rich areas in the Netherlands is not a consistently significant, spatially restricted risk factor for acquiring salmonellosis or campylobacteriosis, thereby supporting current knowledge that human infections with Salmonella and Campylobacter are mainly foodborne.

Cross-sectional serological study to estimate foot-and-mouth disease virus non-structural protein antibodies in randomly sampled small ruminants and pigs in Haryana during 2019 and 2020

Cross-sectional serological study to estimate foot-and-mouth disease virus non-structural protein antibodies in randomly sampled small ruminants and pigs in Haryana during 2019 and 2020

Mapping serogroup distribution and seroprevalence of leptospirosis in livestock of Assam, Northeastern State of India: Unveiling uncommon Leptospira serogroups

Leptospirosis is a significant zoonotic disease affecting livestock, leading to reproductive issues and economic losses. Despite its endemic status in India, research has predominantly focused on coastal regions, leaving the North Eastern Region (NER) underexplored. This study aims to investigate the seroprevalence and serogroup distribution of leptospirosis in livestock across Assam, a major state in the North Eastern Region (NER) of India. Serum samples (n=811) from cattle, buffalo, sheep, goats, and pigs were collected between 2016 and 2019 and screened using the Microscopic Agglutination Test (MAT) for 24 serogroups. The overall seroprevalence was 22.9 % (186/811), with highest prevalence in cattle (26.2 %) and buffalo (25 %), followed by small ruminants (19.8 %) and pigs (18.6 %) . Notably, uncommon serovars such as Mini (28.8 %), Manhao (12.4 %), and Cynopteri (7.5 %) were identified, indicating a unique epidemiological pattern in Assam. High seroprevalence was observed in districts like Bongaigaon (66.7 %), Kamrup Metropolitan (50.0 %), and Nalbari (40.0 %), emphasizing the need for targeted intervention strategies. The presence of these uncommon serogroups, typically found in neighbouring countries and other regions, suggests potential transboundary transmission from these countries. This study provides valuable insights into the seroprevalence and serogroup distribution of leptospirosis in Assam's livestock, highlighting the need for region-specific surveillance and control measures. These findings underscore the importance of understanding the local epidemiological landscape to develop effective disease management and prevention strategies, ultimately reducing the impact of leptospirosis in the NER of India.

Comparative epidemiological study of the spread of African swine fever in Ukraine and some Eastern European countries

African swine fever is one of the most serious threats to the world pig industry due to high infectivity and mortality rates among pigs. To date, no effective means of active prevention of the infection have been developed. The only effective method of control is passive monitoring of the spread of the pathogen among the population of domestic and wild pigs, detection of infected animals and their depopulation. The study analyzes the spread of African swine fever in Ukraine from 2012 to 2024 and compares it with the countries that share a common border – Poland, Romania, Hungary, Slovakia and Moldova. In Ukraine, the first outbreaks were recorded in 2012 in Zaporizhzhia region among domestic pigs. In total, 619 outbreaks were detected during the study period: 482 among domestic pigs and 137 among wild pigs. The largest number of outbreaks was recorded in Odesa (64), Poltava (54), Mykolaiv (52) and Kyiv (46) regions. In Eastern European countries, African swine fever was detected later: in Poland – since 2014 (1304 among domestic and 17871 among wild pigs), Romania – since 2017 (6729 and 3649, respectively), Hungary and Slovakia – since 2018 (0 and 7875; 72 and 3645). In Moldova, the first outbreak was in 2020 (39 among domestic and 45 among wild pigs). The highest total number of outbreaks was recorded in Poland (19175), mainly among wild boars (93.2%). In Hungary, all detected cases involved wild animals. The analysis revealed a statistically significant difference in the number of African swine fever outbreaks between the analyzed countries. There is also a difference in the number of outbreaks within the analyzed time period. If we analyze the number of cases since 2018, there is no statistically significant difference. Prevention and control of African swine fever are complicated by the circulation of the pathogen among wild boars, non-compliance with biosecurity measures by owners of small pig farms and the movement of infected animals. Comprehensive monitoring with early detection of outbreaks and timely destruction of infected animals plays a key role. Key words: pigs, African swine fever, spread, viruses, epizootic analysis, epizootic situation.

How Sustainable Are Small Pig Farms in Assam? Assessing the Need for Study and Action

How Sustainable Are Small Pig Farms in Assam? Assessing the Need for Study and Action

A survey of gastrointestinal helminth infestation in smallholder backyard pigs and the first molecular identification of the two zoonotic helminths Ascaris suum and Trichuris suis in Myanmar

BackgroundParasitic infestations have a substantial economic impact on pig production. This study aimed to investigate the gastrointestinal (GI) helminths in pigs and to molecularly characterise two important nematodes, Ascaris and Trichuris species.Materials and methodsA total of 500 pig faecal samples were collected from small holder backyard pig farms in five townships within Nay Pyi Taw, Myanmar. Microscopic examination was conducted to estimate the prevalence of GI helminth infestation in the pigs. DNA extraction and PCR were performed on faecal samples that were morphologically positive for Ascaris and Trichuris eggs. Molecular analysis was then conducted to characterise A. suum and T. suis, the most common and zoonotic helminths.ResultsAccording to microscopic examination, 69.2% (346/500) were positive for GI helminth eggs. The GI helminth species observed were A. suum, Strongyle, Strongyloides spp., T. suis, Metastrongylus spp., Hyostrongylus spp., Fasciolopsis spp., Paragonimus spp., and Schistosoma spp., with occurrences of 34.8%, 29.6%, 21.4%, 20.0%, 4.0%, 1.6%, 1.0%, 1.0%, and 0.4%, respectively. Mixed infections of GI helminths were noted in 31.0% of the samples. Overall, sampled pigs excreted mostly low levels (< 100 EPG) or moderate levels (> 100–500 EPG) of GI helminth eggs. The highest mean EPG for each parasite species was noted in A. suum. The presence of A. suum and T. suis was confirmed molecularly. The sequences of the internal transcribed spacer 1 (ITS1) region of A. suum showed high similarity with previously reported sequences. Likewise, the sequences of T. suis exhibited high similarity with the sequences reported from humans and pigs. Age was noted as an associated factor (P < 0.05) for GI helminth infection status.ConclusionsIn this report, A. suum and T. suis were molecularly identified for the first time in Myanmar. It is important to extend the information among the farmers to be aware of the necessity of preventing zoonotic parasites by practicing regular deworming, proper use of anthelmintics and maintaining hygienic conditions in their pig farms.

Mobile genetic elements mediate the cross-media transmission of antibiotic resistance genes from pig farms and their risks

Manure composting in traditional small-scale pig farms leads to the migration and diffusion of antibiotics and antibiotics resistance genes (ARGs) along the chain of transmission to the surrounding environment, increasing the risk of environmental resistance. Understanding the transmission patterns, driving factors, and health risks of ARGs on small-scale pig farms is important for effective control of ARGs transmission. This study was conducted on a small pig farm and its surrounding environment. The cross-media transmission of ARGs and their risks in the farming habitat were investigated using Metagenomic annotation and qPCR quantitative detection. The results indicate that ARGs in farms spread with manure pile-soil-channel sediment-mudflat sediment. Pig farm manure contributed 22.49 % of the mudflat sediment ARGs. Mobile genetic elements mediate the spread of ARGs across different media. Among them, tnpA and IS26 have the highest degree. Transmission of high-risk ARGs sul1 and tetM resulted in a 50 % and 116 % increase in host risk for sediment, respectively. This study provides a basis for farm manure management and control of the ARGs spread.

The effects of phenotyping and genotyping strategies, and the use of conventional or organic sires on genetic gain in an organic pig population

Optimizing organic pig breeding schemes depends on how to best allocate resources to phenotyping and genotyping. This study investigates how phenotyping and genotyping strategies affect genetic gain in a small organic pig population. We used stochastically simulated breeding schemes aimed at producing three-way crossbred finisher pigs. The simulated breeding schemes varied in the availability of phenotypes and genotypes for purebreds and crossbreds, the origin of the sire, and the genetic correlation between purebred and crossbred performance. For each simulated breeding scheme, genetic gain and rate of inbreeding were collected for up to 100 replicates. Phenotyping of crossbred individuals did not improve the genetic gain in the purebreds or the crossbreds. Genotyping purebred sows did improve genetic gain in both purebreds and crossbreds. Genetic gain and rate of inbreeding were maximized when internal sires were used, assuming strong GxE between organic and conventional production systems. Yet, breeding schemes that used internal sires had a larger variance in the genetic gain than those that used external sires. In conclusion, breeding schemes for organic pigs can be optimized by using internal sires and by genotyping the purebred parents. Yet, the rate of inbreeding and population size should be taken into careful consideration when developing an independent breeding program for a small (organic) population.

Feeding modes and technical efficiency of small pig holders in Vietnam: a case study in Hanoi

Feeding modes and technical efficiency of small pig holders in Vietnam: a case study in Hanoi

Methods of assessing emissions of contaminants from sties into the air

Provision of competitiveness in the sphere of animal farming in Ukraine requires the introduction of innovative systems of technological support involving modern microprocessor control-measurement systems and devices. The method of continuous automatic record of emissions of contaminants from animal premises reveals patterns in emissions of the main air contaminants and allows their mass concentrations and dynamics of emissions to be tracked over 24 h period. By employing this method, we determined the coefficients of 24 h emissions of carbon dioxide and methane from premises for fattening young swine. The coefficients of 24 h emission of ammonia were found to be significantly lower in the sty with a slatted floor in pens for the winter, spring, and autumn periods compared with the sties with concrete floor. However, coefficients of 24 h emission of methane were significantly higher by 76.1–286.9% in the sty with a slatted floor, which is associated with the peculiarities of technology of the self-cleaning system. Two-times removal of manure from the sty with concrete floor significantly reduced the average annual coefficients of emission of carbon dioxide, ammonia, and methane, by 12.1%, 22.4%, and 13.5%, respectively. Analysis of emission of the main contaminants from the sties with slatted and concrete floor in pens indicated a significant effect of this factor on the amount of emission, structure, and presence of seasonal and daily variability in those parameters. Accumulation of experimental materials regarding emission of contaminants will allow average actual parameters of emissions from small pig farms to be identified, which will allow adequate assessment of the effect their activity has on the environment, particularly in residential areas, and substantiate the minimal allowable distances to sanitary-protective zones.

Overview of Ecology and Aspects of Antibiotic Resistance in Campylobacter spp. Isolated from Free-Grazing Chicken Tissues in Rural Households.

Rural households all over the world rear backyard chicken mainly for their own consumption and, to a lesser extent, for barter trade. These chickens represent a staple dish with numerous culinary variations and a cheap source of protein. Although some Campylobacter species, and particularly Campylobacter jejuni and Campylobacter coli, have been associated with industrial poultry carcasses, studies concerning the ecology of this genus in rural households do not exist. To assess the prevalence of Campylobacter species in the tissues of backyard chickens, samples were collected from birds Gallus domesticus bred in households in the rural area of Epirus (Greece), and Campylobacter strains were isolated by quantitative methods at 37 °C and 42 °C. In total, 256 strains were identified, belonging to 17 Campylobacter species, with C. jejuni and C. coli being the most prevalent. From the four ecological parameters studied (size of the flock, presence of small ruminants in the same household, presence of other poultry species in the same household, and feeding leftovers of the household), the size of the flock and the presence of small ruminants and/or pigs in the same household mostly affected the distribution of these strains. To study the phenotypical resistance against 14 antibiotics, 215 strains were selected. The results showed a high prevalence of multidrug-resistance (MDR) strains extending to all classes of antibiotics. Further genome analysis revealed the presence of genes coding resistance (blaOxA-61, tet(O), tet(A) cmeA, cmeB, cmeC, and gyrA (Thr-86-Ile mutation)), with the efflux pump CmeABC being the most prevalent. All antimicrobial resistance-encoded genes co-circulated, except for blaOXA-61, which moved independently. The minimum inhibitory concentration (MIC) values of two out of three antibiotics (representing different classes) were reduced when the strains tested were exposed to carbonyl cyanide 3-chlorophenylhydrazone (CCCP), a known efflux pump inhibitor. The same result was obtained with the addition of CCCP to the MIC values of bile salts. These results lead to the conclusion that Campylobacter species are present in an impressive diversity in backyard chicken tissues and that they exert a significant resistance to antibiotics, raising a potential danger for public health.