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Sellali S, Lafri I, Ayhan N, Medrouh B, Messahel NE, Lafri M, Charrel R, Bitam I. Neutralizing based seroprevalence study of Toscana virus in livestock from Algeria. Comp Immunol Microbiol Infect Dis 2023; 103:102075. [PMID: 37922744 DOI: 10.1016/j.cimid.2023.102075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 11/07/2023]
Abstract
Toscana virus is a sandfly-borne human pathogen belonging to Phlebovirus genus into Phenuiviridae family. It is emerging in north Africa posing a complex threat to public health. TOSV is heavily affecting sandfly-exposed people in northern Algeria. A larger distribution has recently been stated in Algeria by using dog sera. Dog exposure to TOSV was repeatedly identified in north Algeria, with 4.56% lately detected to possess respective neutralizing antibodies. However, evidence for TOSV has only been observed in dogs among various species of domestic animals. Therefore, we attempted to assess sera from 221 livestock comprising cattle, sheep, goats, rabbits and horses, to identify the presence of TOSV neutralizing antibodies. The study was conducted during 2017, in 11 areas from the governorates of Blida, Medea, Algiers, Tipaza, Ain Defla, Tissemsilt in the north center, and Setif, Mila, Tizi Ouzou, Jijel in the northeast of Algeria. Positive results were obtained in 14.6% (12/82) cattle, 17.18% (11/64) sheep, 15% (3/20) horses and 3.33% (1/30) goats, whereas rabbits remained negative. Positive samples originated mainly from the north centre, with new areas being first-ever detected. The seroprevalence was noticed to be very strongly related to sample origin (p < 0.01). Females (OR=4.09) were observed to be more likely infected. Our findings represent a further proof of TOSV circulation in Algeria. Moreover, they revealed a potential role of livestock (p = 0.00731) in its natural cycle. This fact emphasize how important is to elucidate the exact contribution of livestock to the epidemiology of sandfly-borne phleboviruses, and their impact on public health.
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Affiliation(s)
- Sabrina Sellali
- Institut des Sciences Vétérinaires, Université Blida 1, Blida, Algeria; Laboraoire des Biotechnologies Liées à la Reproduction Animale (LBRA), Institut des Sciences Vétérinaires Université Blida 1, Blida, Algeria
| | - Ismail Lafri
- Institut des Sciences Vétérinaires, Université Blida 1, Blida, Algeria; Laboraoire des Biotechnologies Liées à la Reproduction Animale (LBRA), Institut des Sciences Vétérinaires Université Blida 1, Blida, Algeria
| | - Nazli Ayhan
- Unité des Virus Emergents (UVE: Aix Marseille Université, IRD 190, Inserm 1207, AP-HM Hôpitaux Universitaires de Marseille, Marseille, France
| | - Bachir Medrouh
- Center of Research in Agro-pastoralism, Djelfa 17000, Algeria
| | | | - Mohamed Lafri
- Institut des Sciences Vétérinaires, Université Blida 1, Blida, Algeria; Laboraoire des Biotechnologies Liées à la Reproduction Animale (LBRA), Institut des Sciences Vétérinaires Université Blida 1, Blida, Algeria
| | - Remi Charrel
- Unité des Virus Emergents (UVE: Aix Marseille Université, IRD 190, Inserm 1207, AP-HM Hôpitaux Universitaires de Marseille, Marseille, France
| | - Idir Bitam
- Center of Research in Agro-pastoralism, Djelfa 17000, Algeria.
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Sellali S, Lafri I, Hachid A, Ayhan N, Benbetka C, Medrouh B, Messahel NE, El Amine Bekara M, Lafri M, Charrel RN, Bitam I. Presence of the sandfly-borne phlebovirus (Toscana virus) in different bio-geographical regions of Algeria demonstrated by a microneutralisation-based seroprevalence study in owned dogs. Comp Immunol Microbiol Infect Dis 2022; 88:101861. [DOI: 10.1016/j.cimid.2022.101861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 07/01/2022] [Accepted: 07/19/2022] [Indexed: 10/17/2022]
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Medrouh B, Lafri I, Beck C, Leulmi H, Akkou M, Abbad L, Lafri M, Bitam I, Lecollinet S. First serological evidence of West Nile virus infection in wild birds in Northern Algeria. Comp Immunol Microbiol Infect Dis 2020; 69:101415. [PMID: 31945717 DOI: 10.1016/j.cimid.2020.101415] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 12/30/2019] [Accepted: 12/31/2019] [Indexed: 01/04/2023]
Abstract
While the epidemiology of Flaviviruses has been extensively studied in most of the Mediterranean basin, little is known about the current situation in Algeria. In order to detect the circulation of West Nile (WNV) and Usutu viruses (USUV) in Kabylia, 165 sera were collected from two wild birds species, namely the long distance migrant Turdus philomelos (song thrush) (n = 92) and the resident Passer domesticus (house sparrow) (n = 73). A total of 154 sera were first analyzed by commercial competition ELISA. WNV and USUV micro-neutralization tests were performed on all c-ELISA positive sera and all samples with poor volume. Overall, 7.8 % (CI95 %: 3.5-11.9) were positive by c-ELISA. Positive results were detected in 12.5 % (CI95 %:5.6-19.4) of song thrushes and 1.5 % (CI95 %: 0.0-4.5) for sparrow. Micro-neutralization tests revealed an overall seroprevalence of 6.7 % for WNV (CI95 %: 2.9-10.3), Neutralizing antibodies were found in 8.7 % (CI95 %: 3.0-14.4) for song thrushes and in 4.1 % (CI95 %: 0.0-8.7) of sparrows. The current study demonstrates significant seroprevalence of WNV antibodies in wild birds in Algeria.
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Affiliation(s)
- Bachir Medrouh
- Institut des sciences vétérinaires, Université Blida 1, Blida, Algeria; Laboratoire Biodiversité et Environnement: Interaction, Génomes, Université des Sciences et de la Technologie Houari Boumediene, Alger, Algeria
| | - Ismail Lafri
- Institut des sciences vétérinaires, Université Blida 1, Blida, Algeria; Laboraoire des Biotechnologies Liées à la Reproduction Animale (LBRA), Université Blida 1, Blida, Algeria.
| | - Cécile Beck
- UMR1161 Virologie, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, Maisons-Alfort, Paris, France
| | - Hamza Leulmi
- Faculté des Sciences de la Nature et de la Vie, Université Blida 1, Blida, Algeria
| | - Madjid Akkou
- Institut des sciences vétérinaires, Université Blida 1, Blida, Algeria
| | - Lynda Abbad
- Département Biomédical, Université Mouloud Mammeri, Tizi-Ouzou, Algeria
| | - Mohamed Lafri
- Institut des sciences vétérinaires, Université Blida 1, Blida, Algeria; Laboraoire des Biotechnologies Liées à la Reproduction Animale (LBRA), Université Blida 1, Blida, Algeria
| | - Idir Bitam
- Laboratoire Biodiversité et Environnement: Interaction, Génomes, Université des Sciences et de la Technologie Houari Boumediene, Alger, Algeria; Ecole Supérieure en Sciences de l'Aliment et des Industries Agro-Alimentaires, Alger, Algeria
| | - Sylvie Lecollinet
- UMR1161 Virologie, INRAE, Ecole Nationale Vétérinaire d'Alfort, ANSES, Université Paris-Est, Maisons-Alfort, Paris, France
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Ouchene-Khelifi NA, Lafri M, Pompanon F, Ouhrouch A, Ouchene N, Blanquet V, Lenstra JA, Benjelloun B, Da Silva A. Genetic homogeneity of North-African goats. PLoS One 2018; 13:e0202196. [PMID: 30114267 PMCID: PMC6095539 DOI: 10.1371/journal.pone.0202196] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 07/30/2018] [Indexed: 11/18/2022] Open
Abstract
North Africa represents a rich and early reservoir of goat genetic diversity, from which the main African breeds have been derived. In this study, the genetic diversity of four indigenous Algerian goat breeds (i.e., Arabia, Makatia, M’Zabite and Kabyle, with n = 12 for each breed) has been investigated for the first time by genome-wide SNP genotyping; moreover in a broader context, genetic structuration of Algerian and Moroccan goats was explored (via FST, MDS, STRUCTURE, FineSTRUCTURE, BAPS, sPCA and DAPC analyses). At national level, the study revealed high level of genetic diversity and a significant phenomenon of admixture affecting all the Algerian breeds. At broader scale, clear global genetic homogeneity appeared considering both Algerian and Moroccan stocks. Indeed, genetic structuration was almost nonexistent among Arabia (from Algeria), Draa, Black and Nord (from Morocco), while the ancestral Kabyle and M’Zabite breeds, reared by Berber peoples, showed genetic distinctness. The study highlighted the threat to the Maghrebin stock, probably induced by unsupervised cross-breeding practices which have intensified in recent centuries. Moreover, it underlined the necessity to deepen our understanding of the genetic resources represented by the resilient North-African goat stock.
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Affiliation(s)
- Nadjet-Amina Ouchene-Khelifi
- Science Veterinary Institute, University of Blida, Blida, Algeria
- Laboratory of Biotechnology related to Animal Reproduction (LBRA), University of Blida, Blida, Algeria
| | - Mohamed Lafri
- Science Veterinary Institute, University of Blida, Blida, Algeria
- Laboratory of Biotechnology related to Animal Reproduction (LBRA), University of Blida, Blida, Algeria
| | - François Pompanon
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, Grenoble, France
| | - Abdessamad Ouhrouch
- National Institute of Agronomic Research (INRA Maroc), Regional Center of Agronomic Research, Beni Mellal, Morocco
- Laboratoire de Biotechnologies et Valorisation des Ressources Phytogénétiques (LBVRP), Université Sultan Moulay Slimane, Béni Mellal, Maroc
| | - Nassim Ouchene
- Science Veterinary Institute, University of Blida, Blida, Algeria
- Laboratory of Biotechnology related to Animal Reproduction (LBRA), University of Blida, Blida, Algeria
| | | | | | - Badr Benjelloun
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, Grenoble, France
- National Institute of Agronomic Research (INRA Maroc), Regional Center of Agronomic Research, Beni Mellal, Morocco
| | - Anne Da Silva
- Univ. Limoges, INRA, EA7500, USC1061 GAMAA, Limoges, France
- * E-mail:
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Harkat S, Laoun A, Belabdi I, Benali R, Outayeb D, Payet-Duprat N, Blanquet V, Lafri M, Da Silva A. Assessing patterns of genetic admixture between sheep breeds: Case study in Algeria. Ecol Evol 2017; 7:6404-6412. [PMID: 28861243 PMCID: PMC5574784 DOI: 10.1002/ece3.3069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 04/02/2017] [Accepted: 04/02/2017] [Indexed: 11/06/2022] Open
Abstract
In developing countries, cross-breeding between local breeds and indigene or exotic breeds represents one of the main threats to the livestock diversity, leading to genetic dilution and loss of unique allelic combination underlying essential local adaptive traits. In this study, two Algerian sheep breeds, known to be highly admixed, were considered as a case study, to demonstrate how combination of different methodologies coupled with the use of specific softwares can be efficient to assess the spatial structuration of a hybrid zone, even in a case of extreme admixture. A fine sampling covering distribution areas of both breeds was implemented in order to study the admixture area and adjacent zones from a phenotypic (i.e., 19 quantitative traits were considered) and a genetic point of view (i.e., 21 microsatellites markers were used). Both approaches gave concordant patterns, highlighting areas with sheep most differentiated (or less admixed) for each breed. In detail, the region of Biskra appeared as the most preserved for the Ouled-Djellal breed and the northwest of Laghouat was identified as the most preserved area for the Rembi breed. The approach proposed in the study offers a low-cost solution to identify the most representative flocks of a breed, allowing the implementation of efficient conservation plans.
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Affiliation(s)
- Sahraoui Harkat
- Laboratoire des biotechnologies liées à la reproduction animale Université de Blida Blida Algeria
| | - Abbes Laoun
- Université de Djelfa Djelfa Algeria.,Ecole nationale supérieure vétérinaire d'El-Harrach Alger Algeria
| | - Ibrahim Belabdi
- Laboratoire des biotechnologies liées à la reproduction animale Université de Blida Blida Algeria
| | - Rédha Benali
- Laboratoire des biotechnologies liées à la reproduction animale Université de Blida Blida Algeria
| | - Djouhar Outayeb
- Laboratoire des biotechnologies liées à la reproduction animale Université de Blida Blida Algeria
| | - Nathalie Payet-Duprat
- INRA UMR 1061 Génétique Moléculaire Animale Limoges France.,Université de Limoges UMR 1061 Génétique Moléculaire Animale Limoges France
| | - Véronique Blanquet
- INRA UMR 1061 Génétique Moléculaire Animale Limoges France.,Université de Limoges UMR 1061 Génétique Moléculaire Animale Limoges France
| | - Mohamed Lafri
- Laboratoire des biotechnologies liées à la reproduction animale Université de Blida Blida Algeria
| | - Anne Da Silva
- INRA UMR 1061 Génétique Moléculaire Animale Limoges France.,Université de Limoges UMR 1061 Génétique Moléculaire Animale Limoges France
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Belabbas R, García M, AinBaziz H, Berbar A, Zitouni G, Lafri M, Bouzouan M, Merrouche R, Ismail D, Boumahdi Z, Benali N, Argente M. Ovulation rate and early embryonic survival rate in female rabbits of a synthetic line and a local Algerian population. World Rabbit Sci 2016. [DOI: 10.4995/wrs.2016.5301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
<p>A higher litter size at birth has been reported in female rabbits from a Synthetic line than in those of the Local Algerian population. The aim of this work was to analyse whether this difference in litter size was due to a higher ovulation rate and/or embryonic survival rate in Synthetic line than in Local Algerian population. In total, 24 multiparous female rabbits from Synthetic line and 23 from Local population were used in this experiment. Litter size at birth was recorded up to the first 3 parities. Litter size was 20% higher in Synthetic line than Local population. At their 4th gestation, the females were euthanized at 72 h post coitum. Synthetic line females had 50% more ova and embryos than those of Local population (+4.42 ova and +3.92 embryos, respectively). Synthetic line displayed a lower percentage of normal embryos and a larger number of unfertilized oocytes than Local population (–2.81% and +0.64 oocytes, respectively), but differences were not relevant. Synthetic line showed a lesser embryonic stage of development at 72 h post coitum, showing a higher percentage of early morulae (31.50 vs. 8.50%) and a lower percentage of compact morulae (51.45 vs. 78.65%) than Local population. No relevant difference was found for early embryonic survival rate between Synthetic line and Local population. In conclusion, the difference in litter size was mainly due to a higher ovulation rate in the Synthetic line, allowing more embryos to develop in this line.</p>
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Ouchene-Khelifi NA, Ouchene N, Maftah A, Da Silva AB, Lafri M. Assessing admixture by multivariate analyses of phenotypic differentiation in the Algerian goat livestock. Trop Anim Health Prod 2015; 47:1343-50. [PMID: 26077115 DOI: 10.1007/s11250-015-0869-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 06/07/2015] [Indexed: 11/25/2022]
Abstract
In Algeria, goat research has been largely neglected, in spite of the economic importance of this domestic species for rural livelihoods. Goat farming is traditional and cross-breeding practices are current. The phenotypic variability of the four main native breeds (Arabia, Makatia, M'zabite and Kabyle), and of two exotic breeds (Alpine and Saanen), was investigated for the first time, using multivariate discriminant analysis. A total of 892 females were sampled in a large area, including the cradle of the native breeds, and phenotyped with 23 quantitative measures and 10 qualitative traits. Our results suggested that cross-breeding practices have ever led to critical consequences, particularly for Makatia and M'zabite. The information reported in this study has to be carefully considered in order to establish governmental plan able to prevent the genetic dilution of the Algerian goat livestock.
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Affiliation(s)
- Nadjet-Amina Ouchene-Khelifi
- Science Veterinary Institute, University of Blida, BP 270, Blida, 09000, Algeria.,Laboratory of Biotechnology related to Animal Reproduction (LBRA), University of Blida, BP 270, Blida, 09000, Algeria
| | - Nassim Ouchene
- Science Veterinary Institute, University of Blida, BP 270, Blida, 09000, Algeria
| | - Abderrahman Maftah
- Science Veterinary Institute, University of Blida, BP 270, Blida, 09000, Algeria
| | - Anne Blondeau Da Silva
- Animal Molecular Genetics Unit (UGMA), UMR INRA 1061, University of Limoges, Limoges, 8700, France.
| | - Mohamed Lafri
- Science Veterinary Institute, University of Blida, BP 270, Blida, 09000, Algeria.,Laboratory of Biotechnology related to Animal Reproduction (LBRA), University of Blida, BP 270, Blida, 09000, Algeria
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Gaouar SBS, Da Silva A, Ciani E, Kdidi S, Aouissat M, Dhimi L, Lafri M, Maftah A, Mehtar N. Admixture and local breed marginalization threaten Algerian sheep diversity. PLoS One 2015; 10:e0122667. [PMID: 25875832 PMCID: PMC4395297 DOI: 10.1371/journal.pone.0122667] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 02/22/2015] [Indexed: 11/19/2022] Open
Abstract
Due to its geo-climatic conditions, Algeria represents a biodiversity hotspot, with sheep breeds well adapted to a patchwork of extremely heterogeneous harsh habitats. The importance of this peculiar genetic reservoir increases as climate change drives the demand for new adaptations. However, the expansion of a single breed (Ouled-Djellal) which occurred in the last decades has generated a critical situation for the other breeds; some of them are being subjected to uncontrolled cross-breeding with the favored breed and/or to marginalization (effective size contraction). This study investigated genetic diversity within and among six of the nine Algerian breeds, by use of 30 microsatellite markers. Our results showed that, in spite of the census contraction experienced by most of the considered breeds, genetic diversity is still substantial (average gene diversity ranging 0.68 to 0.76) and inbreeding was not identified as a problem. However, two breeds (Rembi and Taâdmit) appeared to have lost most of their genetic originality because of intensive cross-breeding with Ouled-Djellal. Based on the above evidence, we suggest Hamra, Sidaoun, and D’man as breeds deserving the highest priority for conservation in Algeria.
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Affiliation(s)
- Samir Bachir Souheil Gaouar
- Department of Biology, Aboubakr Belkaid Tlemcen University, Tlemcen, Algeria
- Molecular and Cellular Laboratory (USTOM), University of Sciences and Technology, Mohamed Boudiaf, Oran, Algeria
| | - Anne Da Silva
- INRA, UMR1061 Génétique Moléculaire Animale, Limoges, France
- Université de Limoges, UMR1061 Génétique Moléculaire Animale, Limoges, France
- * E-mail:
| | - Elena Ciani
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Samia Kdidi
- Livestock and Wildlife Laboratory, Arid Lands Institute Medenine, Medenine, Tunisia
- Laboratory of Genetics, Immunology and Human Pathology, Faculty of Sciences, Tunis-El Manar University, Tunis, Tunisia
| | - Miloud Aouissat
- Technical Institute of Breeding (ITElv) of Aïn El-Hadjar, Saïda, Algeria
| | - Laziz Dhimi
- Technical Institute of Breeding (ITElv) of Aïn M’lila, Constantine, Algeria
| | - Mohamed Lafri
- Laboratoire des Biotechnologies liées à la Reproduction Animale (LBRA) Université de Blida, Blida, Algérie
| | - Abderrahman Maftah
- INRA, UMR1061 Génétique Moléculaire Animale, Limoges, France
- Université de Limoges, UMR1061 Génétique Moléculaire Animale, Limoges, France
| | - Nadhira Mehtar
- Department of Biology, Aboubakr Belkaid Tlemcen University, Tlemcen, Algeria
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Lafri M, Ponsart C, Nibart M, Durand M, Morel A, Jeanguyot N, Badinand F, De Mari K, Humblot P. Influence of CIDR treatment during superovulation on embryo production and hormonal patterns in cattle. Theriogenology 2002; 58:1141-51. [PMID: 12240917 DOI: 10.1016/s0093-691x(02)00637-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
One of the major sources of success in embryo transfer is timing of AI relative to the LH surge and ovulation. The aim of this study was to compare the embryo production following superovulation during a PGF2alpha (control cycle) or a CIDR-B synchronized cycle (CIDR-B cycle). CIDR-B (CIDR-B ND, Virbac, Carros, France) was inserted on Day 11 of a previously synchronized cycle and left for 5 days. A total dose of 350 microg FSH was administered (eight injections i.m. for 4 days; first on Day 13, decreasing doses) and PGFalpha analog (750 microg i.m.: Uniandine ND, Schering-Plough, Levallois-Perret, France) injected at the time of third FSH injection. Artificial inseminations were performed 12 and 24 h after standing estrus (Day 0). Embryos were collected on Day 7. Luteinizing hormone was measured by EIA (Reprokit Sanofi, Libourne, France) from blood samples collected every 3 h for 36 h, starting 24 h after PGF2alpha (control cycle) or 12 h after CIDR-B removal (CIDR-B cycle). The effects of treatment group and interval between the LH peak and AI (two classes, < 10 and > or = 10 h) on embryo production and quality were analyzed by ANOVA. No effect of treatment was observed on embryo production variables. The intervals between the end of treatment and onset of estrus and between end of treatment and LH surge were greater in heifers treated during a control than a CIDR-B cycle, respectively (45.5 +/- 1.4 versus 31.9 +/- 0.7; 42.0 +/- 1.6 versus 31.0 +/- 1.5; P < 0.05), but maximal LH and estradiol concentrations, at the preovulatory surge were similar in control and CIDR-B synchronized heifers. The numbers of viable and Grade I embryos were significantly increased (P < 0.01) when animals had an interval from LH peak to first AI > or = 10 h (7.2 +/- 0.9 and 3.5 +/- 0.6) when compared to shorter intervals (4.2 +/- 1.1 and 2.0 +/- 0.7) whereas total number of embryos was unchanged (11.8 +/- 1.4 versus 10.3 +/- 1.8). It is concluded that late occurrence of LH peaks in relation to estrous behavior is associated with a lower embryo quality when first AIs are performed systematically 12 h after standing estrus. Further studies are needed to know if results may be improved when making AI at a later time after standing estrus or if LH assays are useful to better monitor AI time.
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Affiliation(s)
- M Lafri
- UNCEIA Services Techniques, Maisons-Alfort, France
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Lafri M, Nibart M, Durand M, Morel A, Jeanguyot N, Humblot P. Effect of the interval between LH peak and first ai on embryo quality in cattle. Theriogenology 1999. [DOI: 10.1016/s0093-691x(99)91969-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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