<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec id="j_jvetres-2022-0054_s_005"><h3>Introduction</h3>
<p>Carvacrol is an essential oil extracted from oregano which can be used as a natural additive in poultry litter and could have a positive impact not only on production rates but also on the quality of poultry meat. The aim of this study was to evaluate the effect of the addition of carvacrol to litter on weight gain and the occurrence of residues in chicken tissues.</p></sec>
<sec id="j_jvetres-2022-0054_s_006"><h3>Material and Methods</h3>
<p>One-day-old Ross 308 chicks were used for the study and were randomly divided into two experimental groups. For 42 days, one group was kept in a room with litter enriched with carvacrol and the second group was kept in a room with litter without carvacrol. After 42 days, the birds were sacrificed and necropsied. Carvacrol content was determined in homogenised organ tissue samples by liquid chromatography–mass spectrometry.</p></sec>
<sec id="j_jvetres-2022-0054_s_007"><h3>Results</h3>
<p>Weekly weighing results showed that exposure to carvacrol in litter had no impact on chicken body weight. The analysis of plasma, muscle, liver and lung tissue after 42 days’ exposure clearly indicated that there were residues of carvacrol in the analysed matrices.</p></sec>
<sec id="j_jvetres-2022-0054_s_008"><h3>Conclusion</h3>
<p>Exposure of chickens to carvacrol left residues but did not affect body weight.</p></sec>
</abstract>

Introduction
Carvacrol is an essential oil extracted from oregano which can be used as a natural additive in poultry litter and could have a positive impact not only on production rates but also on the quality of poultry meat. The aim of this study was to evaluate the effect of the addition of carvacrol to litter on weight gain and the occurrence of residues in chicken tissues.
Material and Methods
One-day-old Ross 308 chicks were used for the study and were randomly divided into two experimental groups. For 42 days, one group was kept in a room with litter enriched with carvacrol and the second group was kept in a room with litter without carvacrol. After 42 days, the birds were sacrificed and necropsied. Carvacrol content was determined in homogenised organ tissue samples by liquid chromatography–mass spectrometry.
Results
Weekly weighing results showed that exposure to carvacrol in litter had no impact on chicken body weight. The analysis of plasma, muscle, liver and lung tissue after 42 days’ exposure clearly indicated that there were residues of carvacrol in the analysed matrices.
Conclusion
Exposure of chickens to carvacrol left residues but did not affect body weight.

A preliminary study of the poultry body weight effect of carvacrol in litter and of carvacrol residue in organ tissue of exposed chickens

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction
Carvacrol is an essential oil extracted from oregano which can be used as a natural additive in poultry litter and could have a positive impact...

Matrix	Concentration (μg g⁻¹)	SD (μg g⁻¹)
Plasma	0.57	±0.26
Muscle	0.64	±0.24
Liver	1.39	±0.21
Lung	1.78	±0.29

Day of experiment	Average control group weight (g)	SD (g)	Average carvacrol group weight (g)	SD (g)	P-value*
1	44	±1	47	±1	<0.621
7	167	±3	154	±2	<0.756
14	388	±29	366	±35	<0.546
21	710	±70	692	±64	<0.865
28	1,103	±132	1,125	±137	<0.921
35	1,487	±196	1,561	±203	<0.9385
42	1,953	±260	2,053	±232	<0.759

A preliminary study of the poultry body weight effect of carvacrol in litter and of carvacrol residue in organ tissue of exposed chickens

Published Online: Nov 04, 2022

Page range: 613 - 617

Received: Jun 27, 2022

Accepted: Sep 19, 2022

DOI: https://doi.org/10.2478/jvetres-2022-0054

Keywords
carvacrol, essential oils, litter, liquid chromatography–mass spectrometry, poultry

© 2022 T. Śniegocki et al. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mean concentrations of carvacrol residues in chicken tissues (μg g−1)

Chicken body weights

A preliminary study of the poultry body weight effect of carvacrol in litter and of carvacrol residue in organ tissue of exposed chickens

Published Online: Nov 04, 2022

Page range: 613 - 617

Received: Jun 27, 2022

Accepted: Sep 19, 2022

DOI: https://doi.org/10.2478/jvetres-2022-0054

Keywordscarvacrol, essential oils, litter, liquid chromatography–mass spectrometry, poultry

© 2022 T. Śniegocki et al. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mean concentrations of carvacrol residues in chicken tissues (μg g−1)

Chicken body weights

Keywords
carvacrol, essential oils, litter, liquid chromatography–mass spectrometry, poultry