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Bazid AH, Wasfy M, Fawzy M, Nayel M, Abdelmegeid M, Thabet RY, Yong HS, El-Sayed MM, Magouz A, Badr Y. Emergency vaccination of cattle against lumpy skin disease: Evaluation of safety, efficacy, and potency of MEVAC ® LSD vaccine containing Neethling strain. Vet Res Commun 2022; 47:767-777. [PMID: 36460903 PMCID: PMC9734455 DOI: 10.1007/s11259-022-10037-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 11/08/2022] [Indexed: 12/04/2022]
Abstract
Lumpy skin disease (LSD) is an emerging disease of cattle causing significantly high economic losses. Control of LSD depends on the use of homologous attenuated LSD virus strains isolated originally from South Africa (the Neethling strain). The virus belongs to the genus Capripoxvirus, which includes sheep pox virus and goat pox virus. The present study was conducted to evaluate the safety and efficacy of a new live attenuated LSD vaccine produced by Middle East for Vaccines (MEVAC®) based on the Neethling strain. Tests were performed both in Egypt and Vietnam. Safety was evaluated by inoculation of five cattle with 10 times the recommended dose and observation of the animals for 14 days. Immunogenicity was tested at different periods post-vaccination (PV) in animals receiving the recommended doses of the vaccine using ELISA and virus neutralization test. Five cows were used to determine the protection index (PI) and non-vaccinated control cattle were included. Three calves were challenged by intradermal inoculation of the wild virus (5 × 105 TCID50) 28 days PV. Field or mass vaccination experiments were conducted in Vietnam during national campaigns in the summer of 2021 with 4301 vaccinated animals closely monitored after vaccination. In the field, around 2% (80/4301) of the animals showed hyper-reactivity, and 0.6% (24/4301) showed small skin swellings that disappeared within few hours PV. Abortion was recorded in three animals (0.3% 3/867). Challenged animals were resistant to clinical disease and PI value was 3.5 log10. Meanwhile, antibody levels determined by the ELISA were inconsistent among animals and laboratories during the study period. Overall, the findings point to a new safe and effective LSD vaccine.
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Affiliation(s)
- Abdel-Hamid Bazid
- Department of Virology, Faculty of Veterinary Medicine, University of Sadat City, 32958 Menoufiya, Egypt
| | - Momtaz Wasfy
- Middle East for Vaccines (MEVAC®), 44813 Sharquia, Egypt
| | - Mohamed Fawzy
- Department of Virology, Faculty of Veterinary Medicine, Suez Canal University, 41522 Ismailia, Egypt
| | - Mohamed Nayel
- Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, University of Sadat City, Menoufiya, Egypt
| | - Mohamed Abdelmegeid
- Department of Animal Medicine, Faculty of Veterinary Medicine, Kafrelsheikh, University, Kafr El Sheikh, Egypt
| | | | - Hui Sian Yong
- Senior Regional Business Manager, Asia Kemin Biologics®, 12 Senoko Drive, 758200 Singapore, Singapore
| | | | - Asmaa Magouz
- Department of Virology, Faculty of Veterinary Medicine, Kafrelsheikh University, 33516 Kafrelsheikh, Egypt
| | - Yassien Badr
- Department of Animal Medicine (Branch of Infectious Diseases), Faculty of Veterinary Medicine, Damanhour University, 22511 El‑Beheira, Egypt
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Badr Y, Noreldin AE, Elewa YHA, Ahmed MS, Inoshima Y, Baker NM, Aamer WN, Abas OM, Nayel M, Rahman MM, Elgendy E, Saleh AG, El-Neweshy MS. Cellular infiltration, cytokines, and histopathology of skin lesions associated with different clinical forms and stages of naturally occurring lumpy skin disease in cattle. Comp Immunol Microbiol Infect Dis 2022; 90-91:101894. [PMID: 36270050 DOI: 10.1016/j.cimid.2022.101894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/24/2022] [Accepted: 10/05/2022] [Indexed: 12/24/2022]
Abstract
Lumpy skin disease (LSD) caused by the Capripoxvirus LSD virus which infects cattle, leading to a serious disease characterized by fever and the eruption of skin nodules all over the surface of the body. Our understanding of the pathogenesis of this disease is still incomplete, particularly the immunopathological alterations occurring in the skin nodules of infected animals. Therefore, we collected skin nodules from naturally infected cattle with different forms of the disease, both in the early stage of clinical infection and after disease progression. The skin samples were examined both histopathologically and immunohistochemically using a variety of antibodies targeting immune cellular markers and cytokines. As a result, the dermatohistopathology revealed orthokeratotic hyperkeratosis, vasculitis, epidermal microvesicles, and cellules claveleuses of Borrel in the early stage of infection, with the severity of the lesions correlating with the severity of the clinical disease. Meanwhile, late-stage samples had epidermal hyperkeratosis as well as dermal lymphocytic and histiocytic infiltrations. The predominant cellular infiltrates in the cutaneous lesions of early-stage LSD samples were interferon (IFN)-γ+ cells and CD4+ T lymphocytes with few macrophage lineage cells. However, in the late-stage samples, numerous Iba-1+ macrophages, with few IFN-γ+ cells and CD4+ T lymphocytes, were detected. Our findings indicate that IFN-γ+ cells, CD4+ T lymphocytes, and macrophages play a key role in the immunity against natural LSD virus infection and imply that cutaneous vasculopathy associated with LSD virus infection is an immune-mediated lesion. The current study contributes to our understanding of the pathogenesis of LSD.
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Affiliation(s)
- Yassien Badr
- Department of Animal Medicine, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, El-Beheira, Egypt; Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan.
| | - Ahmed E Noreldin
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, Egypt
| | - Yaser Hosny Ali Elewa
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed S Ahmed
- Department of Pathology, Faculty of Veterinary Medicine, Kafrelsheikh University, 33516 Kafrelsheikh, Egypt
| | - Yasuo Inoshima
- Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan; Education and Research Center for Food Animal Health, Gifu University (GeFAH), 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
| | - Nabil M Baker
- Department of Animal Medicine, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, El-Beheira, Egypt
| | - Waleed Nabih Aamer
- Agricultural Research Center, Animal Health research Institute, Damanhour, El-Beheira, Egypt
| | - Osama M Abas
- Department of Animal Medicine, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Mohamed Nayel
- Department of Animal Medicine and Infectious Diseases, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Menoufia, Egypt
| | - Md Matiur Rahman
- Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan; Department of Medicine, Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet 3100, Bangladesh
| | - Emad Elgendy
- Department of Microbiology, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, El-Beheira, Egypt
| | - Asmaa G Saleh
- Department of Animal Medicine, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, El-Beheira, Egypt
| | - Mahmoud S El-Neweshy
- Department of Pathology, Faculty of Veterinary Medicine, Kafrelsheikh University, 33516 Kafrelsheikh, Egypt.
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Lumpy Skin Disease Outbreaks in Africa, Europe, and Asia (2005-2022): Multiple Change Point Analysis and Time Series Forecast. Viruses 2022; 14:v14102203. [PMID: 36298758 PMCID: PMC9611638 DOI: 10.3390/v14102203] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/01/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022] Open
Abstract
LSD is an important transboundary disease affecting the cattle industry worldwide. The objectives of this study were to determine trends and significant change points, and to forecast the number of LSD outbreak reports in Africa, Europe, and Asia. LSD outbreak report data (January 2005 to January 2022) from the World Organization for Animal Health were analyzed. We determined statistically significant change points in the data using binary segmentation, and forecast the number of LSD reports using auto-regressive moving average (ARIMA) and neural network auto-regressive (NNAR) models. Four significant change points were identified for each continent. The year between the third and fourth change points (2016-2019) in the African data was the period with the highest mean of number of LSD reports. All change points of LSD outbreaks in Europe corresponded with massive outbreaks during 2015-2017. Asia had the highest number of LSD reports in 2019 after the third detected change point in 2018. For the next three years (2022-2024), both ARIMA and NNAR forecast a rise in the number of LSD reports in Africa and a steady number in Europe. However, ARIMA predicts a stable number of outbreaks in Asia, whereas NNAR predicts an increase in 2023-2024. This study provides information that contributes to a better understanding of the epidemiology of LSD.
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Sethi RK, Senapati SK, Selim AM, Acharya AP, Mishra C, Das M, Hegazy YM, Biswal SS. Molecular epidemiology of lumpy skin disease outbreak in Odisha, India. Vet Res Commun 2022; 46:711-717. [PMID: 35459980 DOI: 10.1007/s11259-022-09886-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 01/10/2022] [Indexed: 12/24/2022]
Abstract
Lumpy skin disease virus (LSDV) is the causative agent of lumpy skin disease (LSD) which is a member of Capripoxvirus. It is an economically critical transboundary disease affecting cattle. This study records an LSD outbreak in Ganjam district of Odisha, India during August 2020. The epidemiological data were analysed and LSDV was genetically characterized. Out of the 452 animals clinically examined (59 farms), 63 animals were clinically affected with LSD, with a total morbidity rate of 13.93%. The morbidity rates in the surveyed villages (n = 10) varied from 5.55 to 21.62%. The multivariable logistic regression analysis showed that grazing of animals (P = 0.013; OR: 2.04; 95% CI: 1.16-3.57) and age of cows > 3 years old (P = 0.001; OR: 2.90; 95% CI: 1.65- 5.07) were potential risk factors for the presence of LSD. Out of the 53 clinically suspected animals' samples, 18 samples (33.96%) were found positive for both the P32 and F genes of Capripoxvirus by PCR. Phylogenetic analysis of the P32 gene of LSDV (MW147486) showed 100% similarity with other isolates from India, Bangladesh, Egypt and Saudi Arabia. Additionally, phylogenetic analysis of the F gene of LSDV (MW147485) revealed a similarity of 97.99%, with Odisha India (MT074110) isolate and located in the same cluster with other Indian isolates.
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Affiliation(s)
- Rajesh Kumar Sethi
- Department of Clinical Medicine, College of Veterinary Science and Animal Husbandry, Odisha University of Agriculture and Technology, Bhubaneshwar 751003, Odisha, India
| | - Santosh Kumar Senapati
- Department of Clinical Medicine, College of Veterinary Science and Animal Husbandry, Odisha University of Agriculture and Technology, Bhubaneshwar 751003, Odisha, India.
| | - Ahmed Magdy Selim
- Internal Medicine, Infectious and Fish Diseases Department, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Aditya Prasad Acharya
- Department of Veterinary Pathology, College of Veterinary Science and Animal Husbandry, Odisha University of Agriculture and Technology, Bhubaneshwar 751003, Odisha, India
| | - Chinmoy Mishra
- Department of Animal Breeding and Genetics, College of Veterinary Science and Animal Husbandry, Odisha University of Agriculture and Technology, Bhubaneshwar 751003, Odisha, India
| | - Manoranjan Das
- Department of Clinical Medicine, College of Veterinary Science and Animal Husbandry, Odisha University of Agriculture and Technology, Bhubaneshwar 751003, Odisha, India
| | - Yamen Mohammed Hegazy
- Animal Medicine Department, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Shuvranshu Shekhar Biswal
- Department of Veterinary Gyanecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Odisha University of Agriculture and Technology, Bhubaneshwar 751003, Odisha, India
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El-Ansary RE, El-Dabae WH, Bream AS, El Wakil A. Isolation and molecular characterization of lumpy skin disease virus from hard ticks, Rhipicephalus (Boophilus) annulatus in Egypt. BMC Vet Res 2022; 18:302. [PMID: 35932057 PMCID: PMC9354321 DOI: 10.1186/s12917-022-03398-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/25/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Lumpy skin disease (LSD), a disease of cattle and buffaloes, has recently become widely prevalent in Egypt. The aim of this study was to ascertain the potential role of Rhipicephalus (Boophilus) annulatus ticks in the transmission of this disease. Samples collected from suspected lumpy skin disease virus (LSDV) infected cows that had previously been vaccinated with the Romanian sheep pox virus (SPPV) in various Egyptian governorates were obtained between May to November over two consecutive years, namely 2018 and 2019. Ticks were morphologically identified and the partial cytochrome oxidase subunit I gene (COI) were sequenced, revealing that they were closely related to R. (Boophilus) annulatus. The G-protein-coupled chemokine receptor (GPCR) gene of the LSDV was used to test hard ticks. RESULTS Two positive samples from Kafr El-Sheikh province and one positive sample from Al-Behera province were reported. BLAST analysis revealed that the positive samples were closely related to the Kazakhstani Kubash/KAZ/16 strain (accession number MN642592). Phylogenetic analysis revealed that the GPCR gene of the LSDV recently circulating in Egypt belongs to a global cluster of field LSDV with a nucleotide identity of 98-100%. LSDV isolation was successfully performed four days after inoculation using 9 to 11-day-old embryonated chicken eggs showing characteristic focal white pock lesions dispersed on the choriallantoic membrane after three blind passages. Intracytoplasmic inclusion bodies, cell rupture, vacuoles in cells, and virus particles ovoid in shape were demonstrated by electron microscopy. CONCLUSION In this study the role of hard ticks in the transmission of the LSDV to susceptible animals in Egypt was revealed and confirmed by various methods.
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Affiliation(s)
- Ramy E El-Ansary
- Zoology and Entomology Department, Faculty of Science Al-Azhar University, Cairo, Egypt.
| | - Wahid H El-Dabae
- Microbiology and Immunology Department, Veterinary Research Division, National Research Centre, Giza, 12622, Dokki, Egypt
| | - Ahmed S Bream
- Zoology and Entomology Department, Faculty of Science Al-Azhar University, Cairo, Egypt
| | - Abeer El Wakil
- Biological and Geological Sciences Department, Faculty of Education, Alexandria University, Alexandria, Egypt.
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Punyapornwithaya V, Seesupa S, Phuykhamsingha S, Arjkumpa O, Sansamur C, Jarassaeng C. Spatio-temporal patterns of lumpy skin disease outbreaks in dairy farms in northeastern Thailand. Front Vet Sci 2022; 9:957306. [PMID: 35990277 PMCID: PMC9386524 DOI: 10.3389/fvets.2022.957306] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
In 2021–2022, there were numerous outbreaks of lumpy skin disease (LSD) affecting cattle farms across Thailand. This circumstance was the country's first encounter with an LSD outbreak. Thus, a better understanding of LSD epidemiology is necessary. The aim of this study was to determine the spatio-temporal patterns of the LSD outbreaks in dairy farming areas. Data from LSD outbreak investigations collected from dairy farms in Khon Kean province, northeastern Thailand, were analyzed using spatio-temporal models including space-time permutation, Poisson, and Bernoulli models. LSD outbreaks were found in 133 out of 152 dairy farms from May to July, 2021. The majority of dairy farms (n = 102) were affected by the LSD outbreaks in June. The overall herd attack, morbidity and mortality rates were 87, 31, and 0.9%, respectively. According to the results of all models, the most likely clusters were found in the northern part of the study area. The space-time permutation and Poisson model identified 15 and 6 spatio-temporal outbreak clusters, respectively, while the Bernoulli model detected only one cluster. The most likely clusters from those models cover radii of 1.59, 4.51, and 4.44 km, respectively. All farms included in the cluster identified by the space-time permutation model were also included in the cluster identified by the Poisson model, implying that both models detected the same outbreak area. Furthermore, the study results suggested that farmers who own farms within a one km radius of the LSD outbreak farm should be advised to implement more stringent insect vector control measures to prevent disease spread. This study provides better insights into the spatio-temporal pattern of clusters of LSD in the outbreak area. The findings of this study can support authorities in formulating strategies to prevent and control future outbreaks as well as prioritizing resource allocation to high-risk areas.
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Affiliation(s)
- Veerasak Punyapornwithaya
- Center of Excellence in Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, Thailand
- Veterinary Public Health and Food Safety Centre for Asia Pacific (VPHCAP), Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Suvaluk Seesupa
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
| | | | - Orapun Arjkumpa
- Department of Livestock Development, Animal Health Section, The 4th Regional Livestock Office, Khon Kaen, Thailand
| | - Chalutwan Sansamur
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat, Thailand
| | - Chaiwat Jarassaeng
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
- *Correspondence: Chaiwat Jarassaeng
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Fawzi EM, Morsi AM, Abd-Elfatah EB. Molecular diagnosis of three outbreaks during three successive years (2018, 2019, and 2020) of Lumpy skin disease virus in cattle in Sharkia Governorate, Egypt. Open Vet J 2022; 12:451-462. [PMID: 36118715 PMCID: PMC9473367 DOI: 10.5455/ovj.2022.v12.i4.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 06/13/2022] [Indexed: 12/24/2022] Open
Abstract
Background Lumpy skin disease (LSD) is endemic in Egypt despite the Egyptian authorities' annual mass vaccination of cattle with sheeppox vaccine (Veterinary Serum and Vaccine Research Institute, Egypt), and the LSD virus (LSDV) continues to thrive practically every summer. The disease has a huge economic impact on the trade of the animal and its by-product. Aim This paper study the molecular characterization of LSDV strains that have been circulating in Sharkia Governorate, Egypt, for three successive years (2018, 2019, and 2020). Methods A total of 61 specimens (26 skin nodules and 35 oculonasal swabs) were collected from a clinic in the hospital of veterinary medicine, Zagazig University, during the summer months (July, August, and September) of three outbreaks in 2018, 2019, and 2020. These were examined by polymerase chain reaction (PCR) based on the open reading frame 103 (ORF103) gene to confirm the suspected cases and determine the degree of homology between the three different outbreaks during three successive years between each other and between the derived sequences of GenBank. Results Cattle is thought to be infected with LSDV due to the presence of scattered local or diffuse circumscribed skin nodules along with fever and lymph node enlargement and sometimes leg edema. The PCR approach proved rapid, sensitive, and specific for the detection of LSDV and confirmative diagnosis of the disease. Forty-six were detected to be positive by PCR (75.4%). The seven sequenced samples were translated to amino acid and registered in GenBank under accession number MW357655-MW357661. A single nucleotide mutation and amino acid variation were observed at positions 161 C (2020)/T (2018&2019) and consequently, a change in the amino acid at position 54 P (2020)/L (2018&2019) between the outbreak in 2020 and those in 2018 and 2019, respectively. The field LSDV isolates from Egypt cattle were more closely related to other LSDV sequences from Africa (Kenya), Asia, Europe, and the United States.These findings highlight the necessity of ongoing surveillance and characterization of circulating strains and the need to improve procedures for distinguishing vaccine strains from field viruses.
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Affiliation(s)
- Elshaima Mohamed Fawzi
- Infectious Diseases, Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt,Corresponding Author: Elshaima Mohamed Fawzi. Infectious Diseases, Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt. ;
| | - AbdelKarem Mansour Morsi
- Internal Medicine, Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Eman Beshry Abd-Elfatah
- Infectious Diseases, Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
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Molecular characterization and phylogenetic analysis of lumpy skin disease in Egypt. Comp Immunol Microbiol Infect Dis 2021; 79:101699. [PMID: 34461343 DOI: 10.1016/j.cimid.2021.101699] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 08/13/2021] [Accepted: 08/23/2021] [Indexed: 11/22/2022]
Abstract
Lumpy skin disease (LSD) is an infectious viral disease affecting cattle, cause severe economic losses. In the last few years, the disease is widely distributed in many countries in the Middle East, including Egypt. This study aimed to determine the genetic character of LSDV circulating in some governorates in Egypt and its relation with other LSDVs and vaccine strains in GenBank. A total of 50 skin nodules and 50 blood samples were collected from clinically affected cattle to detect LSDV using PCR targeting the P32 gene. The positive samples were characterized using PCR targeting the GPCR gene. The amplified products of four samples detected in the skin nodule of cattle from Alexandria and Kafr ElSheikh governorates were sequenced, and the phylogenetic tree was constructed. Out of 100 analyzed samples, 70 samples were positive for LSDV by PCR assay. In addition, the sequence alignment of the obtained LSDV strains detected in the Alexandria governorate showed high similarity to the LSDV genome (MN995838). In contrast, LSDV strains from Kafr ElSheikh governorate revealed high similarity and the previous Egyptian strain (MG970343), which was isolated from cattle in Sharkia governorate in 2016. Also, the phylogenetic analysis confirmed that one of the LSDV strain (LC601598) from Alexandria is closely related to the LSDV of Menofia/Egypt/2019 (MN271722), while another one (LC601597) is closely related to vaccine strains of LSDV. Moreover, the LSDV strains from Kafr Elsheikh showed closely related to previous LSDV strains isolated from Menofia (MG970343) and Dakahlia (KP071936) governorates and clustered with other LSDV strains in a distinct cluster. This information is for understanding the epidemiology of LSDV and supporting the establishment of an efficient control program for the disease.
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A review: Surveillance of lumpy skin disease (LSD) a growing problem in Asia. Microb Pathog 2021; 158:105050. [PMID: 34146642 DOI: 10.1016/j.micpath.2021.105050] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/30/2021] [Accepted: 06/10/2021] [Indexed: 11/23/2022]
Abstract
Lumpy skin disease (LSD) is a viral disease caused by lumpy skin disease virus (LSDV), a member of Capripoxvirus, genus of Poxviridae family. It is a transboundary infection of monetary significance that primarily affects water buffaloes and cattle. LSD was known to be once endemic in Saharan regions of Africa but later on reported in central Asian and neighboring countries of Pakistan like, India, Iran and China. It is a vector borne disease and arthropods are believed to be the main perpetrators. It is discernible by its high morbidity and low mortality. Characteristic lumps on skin and high fever are considered as major signs while reduced milk production, infertility, early embryonic death and anorexia are some of the salient clinical manifestations of the disease. Additionally, nodules on mucosa of oro-pharynx, udder, genitalia and rectum are usually observed on examination. This article summarizes LSD outbreaks across Asia during last fifteen years. It is a general consensus amongst the veterinary community that disease is endemic in Pakistan as it shares borders with India, Iran and China where recent outbreaks are reported. Historically Pakistan is free of LSD, however it is at high risk of a LSDV outbreak as neighboring regions are becoming endemic. Vaccination, strict quarantine measures, limited movement of livestock along with vector control could be effective for preventing the spread of the disease. This review aims to summarize the latest developments in the epidemiology of LSD with the focus on transboundary spread, possible emergence and economic implications on Pakistan.
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Selim A, Manaa E, Khater H. Seroprevalence and risk factors for lumpy skin disease in cattle in Northern Egypt. Trop Anim Health Prod 2021; 53:350. [PMID: 34105025 DOI: 10.1007/s11250-021-02786-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 05/23/2021] [Indexed: 10/21/2022]
Abstract
Lumpy skin disease (LSD) is an endemic infectious viral disease of cattle in African and Middle East countries. A cross-sectional study was conducted to determine the seroprevalence of LSD among cattle in Northern Egypt and assessed the associated risk factors with LSD infection. A total of 1000 sera samples were collected from cattle and examined serologically with commercial ELISA kit. Overall, the true seroprevalence of LSD among cattle in Egypt was 19.5% (n = 180). The true seroprevalence rate was varied significantly between different geographical studied areas, and the highest level was observed in Kafr El-Sheikh (26.7%) and Gharbia (23.7%) governorates. Moreover, the risk of getting LSD infection was increased among Holstein breed (OR = 4.586; 95%CI, 1.83-11.48) and adult cattle (OR = 2.498; 95%CI, 1.17-5.32) during summer season (OR = 7.303, 95%CI: 3.97-13.42). Furthermore, communal grazing (OR = 1.546; 95%CI, 0.91-2.60), communal water points (OR = 3.283; 95%CI, 2.11-5.09), introduction of new animal (OR = 2.216; 95%CI, 1.32-3.71), and contact with other animals (OR = 3.401; 95%CI, 1.62-7.10) were identified as significant risk factors for the occurrence of LSDV infection in cattle. Moreover, the present study revealed that no significant (P > 0.05) association between sex or type of herd and occurrence of LSD infection.
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Affiliation(s)
- Abdelfattah Selim
- Faculty of Veterinary Medicine, Department of Animal Medicine (Infectious Diseases), Benha University, Toukh, 13736, Egypt.
| | - Eman Manaa
- Animal and Poultry Production, Faculty of Veterinary Medicine, Department of Animal Wealth Development, Benha University, Toukh, Egypt
| | - Hanem Khater
- Faculty of Veterinary Medicine, Parasitology Department, Benha University, Toukh, Egypt
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