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Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites

In Tunisia, livestock plays an important role in the economy; unfortunately, Tunisian sheep population faces several health challenges. The aim of this trial was to study phenotypic variability of four local sheep breeds and strains to abomasum nematodes infection and to Babesia/Theileria parasites....

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Autores principales: Rouatbi, Mariem, Romdhane, Rihab, Bouaicha, Faten, Saddem, Rahma, Sassi, Limam, Dhibi, Mokhtar, Rekik, Mourad, Haile, Aynalem, Mwacharo, Joram M., Rischkowsky, Barbara, Darghouth, Mohamed Aziz, Gharbi, Mohamed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7738738/
https://www.ncbi.nlm.nih.gov/pubmed/32588559
http://dx.doi.org/10.1002/vms3.310
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author Rouatbi, Mariem
Romdhane, Rihab
Bouaicha, Faten
Saddem, Rahma
Sassi, Limam
Dhibi, Mokhtar
Rekik, Mourad
Haile, Aynalem
Mwacharo, Joram M.
Rischkowsky, Barbara
Darghouth, Mohamed Aziz
Gharbi, Mohamed
author_facet Rouatbi, Mariem
Romdhane, Rihab
Bouaicha, Faten
Saddem, Rahma
Sassi, Limam
Dhibi, Mokhtar
Rekik, Mourad
Haile, Aynalem
Mwacharo, Joram M.
Rischkowsky, Barbara
Darghouth, Mohamed Aziz
Gharbi, Mohamed
author_sort Rouatbi, Mariem
collection PubMed
description In Tunisia, livestock plays an important role in the economy; unfortunately, Tunisian sheep population faces several health challenges. The aim of this trial was to study phenotypic variability of four local sheep breeds and strains to abomasum nematodes infection and to Babesia/Theileria parasites. Faeces, blood and abomasum contents were collected from 310 sheep slaughtered in eight commercial slaughterhouses across North Tunisia. Haematological and biochemical parameters were assessed. DNA was extracted and catch‐all primers were used to detect both Theileria spp. and Babesia spp. DNA. Faecal egg counts (FEC) was quantitatively assessed using simple flotation technique followed by McMaster technique. Male and female worms were collected from all abomasum contents and counted under a stereomicroscope. The percentage of faeces samples positive for GIN’s eggs was 30.82%. After worms’ recovery, the infection prevalence was estimated to 75.90%. The overall infection prevalence by Babesia spp. and Theileria spp. was 4.21%. The dispersion of observations plots obtained by principal component analysis (PCA) showed two clusters of individuals. The first cluster contains animals having positive Babesia/Theileria PCR, presence of nematodes in the abomasum contents and relatively low total worm count (TWC < 500) expect one animal which was found bearing high TWC (>500). In this same group, with a suspected form of resistance, animals showed normal values of albumin and normal haematological parameters (red blood cell count [RBC], haemoglobin [Hb] and packed cell volume [PCV]). The second cluster represents all the other observations in which subgroups of animals were distinguished on the basis of their potential resistance to abomasum nematodes. Multiple correlations showed significant positive correlations between RBC/Hb, RBC/PCV, PCV/Hb and FEC/TWC. Significant negative correlations were observed between TWC/RBC and TWC/Hb. It is concluded that the phenotypic variability among local sheep breeds is essential for more advanced genetic and genomic studies.
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spelling pubmed-77387382020-12-18 Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites Rouatbi, Mariem Romdhane, Rihab Bouaicha, Faten Saddem, Rahma Sassi, Limam Dhibi, Mokhtar Rekik, Mourad Haile, Aynalem Mwacharo, Joram M. Rischkowsky, Barbara Darghouth, Mohamed Aziz Gharbi, Mohamed Vet Med Sci Original Articles In Tunisia, livestock plays an important role in the economy; unfortunately, Tunisian sheep population faces several health challenges. The aim of this trial was to study phenotypic variability of four local sheep breeds and strains to abomasum nematodes infection and to Babesia/Theileria parasites. Faeces, blood and abomasum contents were collected from 310 sheep slaughtered in eight commercial slaughterhouses across North Tunisia. Haematological and biochemical parameters were assessed. DNA was extracted and catch‐all primers were used to detect both Theileria spp. and Babesia spp. DNA. Faecal egg counts (FEC) was quantitatively assessed using simple flotation technique followed by McMaster technique. Male and female worms were collected from all abomasum contents and counted under a stereomicroscope. The percentage of faeces samples positive for GIN’s eggs was 30.82%. After worms’ recovery, the infection prevalence was estimated to 75.90%. The overall infection prevalence by Babesia spp. and Theileria spp. was 4.21%. The dispersion of observations plots obtained by principal component analysis (PCA) showed two clusters of individuals. The first cluster contains animals having positive Babesia/Theileria PCR, presence of nematodes in the abomasum contents and relatively low total worm count (TWC < 500) expect one animal which was found bearing high TWC (>500). In this same group, with a suspected form of resistance, animals showed normal values of albumin and normal haematological parameters (red blood cell count [RBC], haemoglobin [Hb] and packed cell volume [PCV]). The second cluster represents all the other observations in which subgroups of animals were distinguished on the basis of their potential resistance to abomasum nematodes. Multiple correlations showed significant positive correlations between RBC/Hb, RBC/PCV, PCV/Hb and FEC/TWC. Significant negative correlations were observed between TWC/RBC and TWC/Hb. It is concluded that the phenotypic variability among local sheep breeds is essential for more advanced genetic and genomic studies. John Wiley and Sons Inc. 2020-06-25 /pmc/articles/PMC7738738/ /pubmed/32588559 http://dx.doi.org/10.1002/vms3.310 Text en © 2020 The Authors. Veterinary Medicine and Science published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Original Articles
Rouatbi, Mariem
Romdhane, Rihab
Bouaicha, Faten
Saddem, Rahma
Sassi, Limam
Dhibi, Mokhtar
Rekik, Mourad
Haile, Aynalem
Mwacharo, Joram M.
Rischkowsky, Barbara
Darghouth, Mohamed Aziz
Gharbi, Mohamed
Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites
title Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites
title_full Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites
title_fullStr Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites
title_full_unstemmed Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites
title_short Individual variability among autochthonous sheep in Northern Tunisia to infection by abomasum nematodes and Babesia/Theileria parasites
title_sort individual variability among autochthonous sheep in northern tunisia to infection by abomasum nematodes and babesia/theileria parasites
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7738738/
https://www.ncbi.nlm.nih.gov/pubmed/32588559
http://dx.doi.org/10.1002/vms3.310
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