Erika Lencsés-Varga

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Publications - 6

Eimeria Oocysts and Passalurus ambiguus Infection of Farmed Rabbits Depending on the Age

Zsolt Gerencsér Zsolt Matics Zoltán Német Erika Lencsés-Varga Boróka Bárdos Csongor Demeter Anett Demeter-Jeremiás Róbert Juráskó András Mayer

Publication Name: Journal of Animal Health and Production

Publication Date: 2025-03-01

Volume: 13

Issue: 1

Page Range: 178-184

Description:

The aim of the study was to investigate the Eimeria spp. and Passalurus ambiguus infections of rabbits by day of life. From 2018 to 2024, pooled faecal samples were collected from 29 Hungarian and 2 Slovakian rabbit farms. Low level of Eimeria oocysts infection was observed during lactation. In the week following the weaning the proportion of positive samples increased. Between day 43 and slaughter age, the proportion of positive samples was consistently high. The average OPG values (number of Eimeria oocysts per gram faeces), never reached 5,000 during the lactation period, but a critical period started at 42 days of age, with average OPG values above 10,000 in several cases. High number of oocysts were observed until the end of fattening period. The exponential smoothing model estimated the onset of Eimeria infection at 38-40 days of age (p=0.023). The proportion of P. ambiguus eggs positive samples reached 50% already in the lactation period. From day 29 to slaughter age, a relatively low rate of infected samples was detected. For P. ambiguus, the model estimated 7 days of age as the increase (p=0.001) of infection. It can be concluded that P. ambiguus eggs and Eimeria oocysts can be detected in the faeces of rabbits during their whole life cycle. During the fattening period (5-11 weeks of age), the Eimeria infection is on high level while the P. ambiguus infection is in low level.

Open Access: Yes

DOI: 10.17582/journal.jahp/2025/13.1.178.184

Effects of a Probiotic Supplement on the Quantity of Some Bacterial Communities in Fecal Samples of Lactating Sows

Tamás Tóth Viktor J. Vojnich Károly Tempfli Klaudia Szalai Erika Lencsés-Varga Sárvári Loretta Csilla Botond Alpár

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 949-954

Description:

Complex adaptation strategies concerning nutrition, housing technology, and veterinary treatment are required to maintain current production levels under increasingly stringent regulations on the preventive application of antibiotics. The reduced application of antibiotics is recommended for the sustainability of industrial pig production. Probiotic supplementation may contribute to improved sow and piglet health, mitigating the need for antibiotics. The effects of probiotic supplementation on sow performance and the quantity of fecal bacterial communities in lactating sows were investigated. Experimental sows received probiotic supplementation (n=10) and were compared to control sows (n=10). Fecal samples were collected from 20 sows in the second week of lactation. The quantitative measurement of total bacteria, Prevotella genus, Lactobacillus spp., and Bifidobacterium spp. was done by qPCR. Differences in backfat thickness (BFT), BFT loss, and feed intake of control and experimental sows were not significant (p>0.05). The amount of total bacteria, Prevotella, and Lactobacillus spp. was lower (p<0.05) in the fecal samples of experimental sows. The Prevotella percentage in total bacteria decreased, whereas Bifidobacterium spp. the ratio increased in experimental supplemented sows. Overall, probiotic supplementation resulted in notable alterations regarding some of the analyzed bacterial communities.

Open Access: Yes

DOI: 10.3303/CET24114159

Gene Expression of Peroxisome Proliferator-Activated Receptor γ in Mangalica and Large White Pigs

Károly Tempfli Klaudia Szalai Erika Lencsés-Varga Sárvári Loretta Csilla Éva Rampasek

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 271-276

Description:

The expression of peroxisome proliferator-activated receptor γ gene (PPARγ) – a major regulator of adipogenesis and intramuscular fat deposition in pigs – was analysed in different tissues of Blonde Mangalica (M) and Hungarian Large White (LW) by means of quantitative reverse transcription PCR. In total, 20 experimental animals were raised and fed under identical conditions, and transported to the abattoir at similar body weight (124.7±10.3 kg; p>0.05). In both breeds highest PPARγ expression was observed in backfat (p<0.001), whereas lower levels were measured in muscle samples. The PPARγ mRNA levels in loin (m. longissimus dorsi) and semimembranosus muscle samples did not differ (p>0.05). Elevated PPARγ expression was observed in M backfat compared to LW (p<0.05). Loin and semimembranosus muscle samples of M showed higher PPARγ mRNA levels than LW (P<0.001), as well. Loin muscle marbling scores significantly correlated with β-actin normalized PPARγ expression (r=0.63; p<0.001) indicating the involvement of PPARγ in the regulation of intramuscular fat development. In conclusion, the differential expression of PPARγ in backfat and muscle samples can contribute to the remarkable differences in the constitution and intramuscular fat accumulation of fat-type M and lean-type commercial LW. Muscle PPARγ mRNA levels may be used as an indicator of marbling characteristics in pigs.

Open Access: Yes

DOI: 10.3303/CET23107046

Yield Performance, Laying Behaviour Traits and Egg Quality of a Crossbred Laying Hen in Alternative Housing Systems

Eszter Zsédely Károly Tempfli Klaudia Szalai Erika Lencsés-Varga G. Takács Sárvári Loretta Csilla

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 121-126

Description:

One aim of this study was to investigate a crossbred laying hen line (400 hens) in two alternative housing systems in two replicates between 20-72 weeks of age. One rearing system was deep litter (D) with artificial light. Hens from Group R were housed in a poultry house with windows on deep litter and access to a runway without artificial light. Birds were fed ad libitum with a concentrate layer feed (18.0 % protein, 11.6 MJ). The egg production was influenced by the housing system. Lower average egg weight was observed in Group R. The feed consumption was also lower here, but the FCR was better compared to D. Floor egg did not cause any problem in the examined systems. The shell strength decreased with age in both systems. However, the rate was higher in Group D. The albumen height and HU value were higher in Group R at the end of the experiment (72nd week of age). Some differences were found in the fatty acid profile between the two housing systems. Another goal of the study was to observe the behaviour patterns of animals kept under different conditions. Behavioural traits were monitored for 100 hens in total on the two farms that applied different housing technologies (50-50 birds with or without outdoor access). Birds with outdoor access showed 0.23±0.81 aggression-related traits per hour, whereas chickens without outdoor access produced 0.15±0.76 of the same traits (p>0.05). Hens with outdoor access showed 2.30±4.65 activity-related traits, whereas, for hens without outdoor access, 0.72±1.83 observations were recorded per hour (p<0.05). Comfort behaviour was similar (p>0.05) in the two groups. In conclusion, the housing system has a complex effect on the assessed crossbred laying hen line.

Open Access: Yes

DOI: 10.3303/CET23107021

Genotyping of a SORCS2 polymorphism and behavioural trait associations in newly developed laying hen populations

Eszter Zsédely Károly Tempfli Hidas András Erika Lencsés-Varga Szálai Klaudia Almási Anita Orbán Attila Sárvári Loretta Csilla Ágnes Bali Papp

Publication Name: Magyar Allatorvosok Lapja

Publication Date: 2021-06-01

Volume: 143

Issue: 6

Page Range: 351-358

Description:

Background: Cage-free egg production methods are advancing in the European Union due to stringent housing regulations, animal welfare and consumer pressure. A changing production environment requests novel adaptation strategies of which the development of specific layer hybrids or strains is notably promising. Cage-free housing systems allow for a rather complete expression of social behaviour in laying hen populations; however, increasing stress, aggression and feather pecking are considered as major consequences. Objectives: This study aimed to detect a recently described SORCS2 polymorphism in newly developed Hungarian laying hen populations and observe potential associations with behavioural traits. Cage-free housing technologies with or without outdoor acces were also compared. Materials and Methods: Occurrence of behavioural traits were individually recorded for 119 hens. A novel PCR-RFLP method was developed and applied for SORCS2 genotyping with Rsal endonuclase. Results and Discussion: The SORCS2 polymorphism was present In the Hungarian populations, Callele frequencies varied between 75.1-85.5%. Homozygous TT genotype was the least prevalent across the three experimental populations with frequencies 2.2-4.2%. The experimental hybrid populations demonstrated different (p < 0.05) levels of aggression and activity related behavioural patterns. Homozygous CC animals showed more cases of aggressive behaviour compared to other genotypes. Feather pecking was more common In populations with outdoor access compared to the closed barn system (p < 0.05). The social behaviour of laying hens Is affected by many factors in an Immensely complex system. Selection efficiency on behaviour can be improved with a more profound knowledge on Its genetics.

Open Access: Yes

DOI: DOI not available

Genotyping of four loci in Hungarian yellow and broiler chickens

Károly Tempfli Klaudia Szalai Erika Lencsés-Varga Ágnes Bali Papp

Publication Name: Acta Veterinaria Hungarica

Publication Date: 2019-01-01

Volume: 67

Issue: 1

Page Range: 1-10

Description:

Traditional selection has led to remarkable differences in allele frequencies among various chicken breeds. Indigenous and broiler-type chicken populations were genotyped for polymorphisms in thyroid hormone responsive Spot14α, prolactin (PRL), IGF-binding protein 2 (IGFBP2), and somatostatin (SST) genes in order to determine potential utilisation type-associated allele frequencies. Significant (P < 0.05) differences were detected between Hungarian Yellow and broiler populations for Spot14α, PRL, and IGFBP2 allele frequencies, whereas the same SST allele (A) was fixed in both groups. In this study, the most significant associations (P < 0.05) were found between the IGFBP2 genotypes and the measured traits (body weight, carcass weight, breast muscle weight with or without skin, breast muscle weight as a percentage of carcass weight) in the broiler population. The results can be applied for the evaluation of polymorphism effects in the analysed populations; however, contradictory allele effects in different breeds and hybrids indicate the need for cautious marker utilisation in selection programmes.

Open Access: Yes

DOI: 10.1556/004.2019.001