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Madyavanhu N, Shekede MD, Kusangaya S, Pfukenyi DM, Chikerema S, Gwitira I. Bovine anaplasmosis in Zimbabwe: spatio-temporal distribution and environmental drivers. Vet Q 2024; 44:1-16. [PMID: 38279663 PMCID: PMC10823892 DOI: 10.1080/01652176.2024.2306210] [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: 05/03/2023] [Accepted: 01/10/2024] [Indexed: 01/28/2024] Open
Abstract
Understanding the spatial and temporal distribution of Bovine anaplasmosis is crucial for identifying areas of high prevalence for targeted disease control. This research was aimed at modelling and mapping the B. anaplasmosis potential distribution, and identify hotspots as well as significant variables explaining the occurrence of the disease. The Getis Ord Gi* statistic for Hotspot analysis was used as well as MaxEnt ecological niche modelling. The effects of time, land-use, and agro-ecological regions on B. anaplasmosis occurrence were tested using Analysis of Variance (ANOVA). Results showed that several districts in Zimbabwe are suitable for the occurence of the disease for example Binga, Seke, Buhera, Kwekwe, Gweru, Mhondoro, Chegutu, Sanyati, and in the North: Mbire, Muzarabani, Mt Darwin, Shamva, Bindura, Zvimba and Makonde. Morbidity and mortality hotspots were detected in Gokwe-south, Kwekwe, and Chirumhanzu districts. Binga, Gokwe-south, Gutu, Hurungwe, Mazoe, Nkayi, Shamva, and Kwekwe districts also experienced high disease incidences. Temperature seasonality, precipitation seasonality, mean diurnal range, and isothermality were the most important variables in explaining 93% of B. anaplasmosis distribution. Unlike land-use and agro-ecological regions, time (months) had a significant effect on B. anaplasmosis occurrence with July and September having significantly (p < 0.05) higher cases and deaths than the rest of the months. The results of this study provide insights into the management strategies and control of B. anaplasmosis in Zimbabwe. It is thus concluded that geo-spatial techniques, combined with ecological niche modelling can provide useful insights into disease prevalence and distribution and hence can contribute to effective management and control of B. anaplasmosis in Zimbabwe.
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Affiliation(s)
- Natasher Madyavanhu
- Department of Geography Geospatial Sciences and Earth Observation, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
| | - Munyaradzi Davis Shekede
- Department of Geography Geospatial Sciences and Earth Observation, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
- Department of Geospatial Sciences and Earth Observation, Zimbabwe National Geospatial and Space Agency, Harare, Zimbabwe
| | - Samuel Kusangaya
- Department of Geography Geospatial Sciences and Earth Observation, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
| | - Davies Mubika Pfukenyi
- Department of Veterinary Sciences, Faculty of Animal and Veterinary Sciences, Botswana University of Agriculture and Natural Resources, Gaborone, Botswana
| | - Sylvester Chikerema
- Department of Clinical Veterinary Studies, University of Zimbabwe, Harare, Zimbabwe
| | - Isaiah Gwitira
- Department of Geography Geospatial Sciences and Earth Observation, Faculty of Science, University of Zimbabwe, Harare, Zimbabwe
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Chen SY, Forero L, Davy J, Stackhouse J, Harvey D, Abdelfattah E, Maier G. Factors associated with perceived Anaplasma marginale infection and clinical anaplasmosis cases on beef operations in California. Ticks Tick Borne Dis 2024; 15:102346. [PMID: 38643720 DOI: 10.1016/j.ttbdis.2024.102346] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/23/2024]
Abstract
Bovine anaplasmosis is a tick-borne disease caused by Anaplasma marginale in the United States. The objective of this study was to use a survey tool to generate information for beef operations in California on anaplasmosis prevention and control management, including to what extent management activities were informed by perceived herd-level exposure to A. marginale infection or occurrence of clinical anaplasmosis cases. We mailed 2,621 questionnaires with questions on Anaplasma status, herd demographics, anaplasmosis control and prevention measures, and environmental factors to beef ranchers in California in October 2020. Survey-weighted chi-square tests were used to compare management differences according to perceived Anaplasma infection status. Generalized estimating equations (GEEs) were used to analyze whether region of California, management practices, or environmental factors were associated with reported clinical cases of anaplasmosis in the previous five years. A total of 466 questionnaires describing 749 herds were obtained and used in this study. Use of management measures, including deliberate exposure of calves to ticks, vaccination for Anaplasma, infection control through antibiotics in feed, maintaining a completely closed herd, blood testing for Anaplasma on all herd additions, and taking no anaplasmosis control and prevention measures, were significantly different between herds with or without perceived A. marginale infection based on producers' self-declared status. The overall perceived prevalence for Anaplasma infection and reported clinical cases of anaplasmosis at the herd level was 26.0 % (95 % CI: 24.3-27.7 %) and 17.1 % (95 % CI: 15.6-18.6 %) respectively, with the highest perceived infection and case numbers reported in the Central Coast region. In the GEE model, higher odds of reporting clinical cases of anaplasmosis in the previous five years were observed in cattle located in the Central Coast region, cattle within a large herd, cattle that are treated with tick/fly control, cattle in a completely closed herd, and cattle receiving Anaplasma vaccine. Anaplasma infection and bovine anaplasmosis status may be underestimated in beef herds in California based on previous study results. Changing needles between cattle after injections and conducting blood testing for Anaplasma on herd additions are important Anaplasma management measures that are infrequently implemented in beef herds in California. The results show a need for producer education to improve producers' awareness of bovine anaplasmosis and implement proper measures for disease control and prevention.
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Affiliation(s)
- S Y Chen
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, United States
| | - L Forero
- University of California Cooperative Extension, Agriculture and Natural Resources, Redding, CA, 96002, United States
| | - J Davy
- University of California Cooperative Extension, Agriculture and Natural Resources, Red Bluff, CA, 96080, United States
| | - J Stackhouse
- University of California Cooperative Extension, Agriculture and Natural Resources, Eureka, CA, 95503, United States
| | - D Harvey
- Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, CA, 95616, United States
| | - E Abdelfattah
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, United States; Department of Animal Hygiene, and Veterinary Management, Faculty of Veterinary Medicine, Benha University, Moshtohor 13736, Egypt
| | - G Maier
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, United States.
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Garcia AB, Jusi MMG, Freschi CR, Ramos IAS, Mendes NS, Bressianini do Amaral R, Gonçalves LR, André MR, Machado RZ. High genetic diversity and superinfection by Anaplasma marginale strains in naturally infected Angus beef cattle during a clinical anaplasmosis outbreak in southeastern Brazil. Ticks Tick Borne Dis 2021; 13:101829. [PMID: 34798528 DOI: 10.1016/j.ttbdis.2021.101829] [Citation(s) in RCA: 3] [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: 10/30/2020] [Revised: 08/04/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022]
Abstract
Anaplasma marginale is an obligate intracellular Gram-negative bacterium that is parasitic to erythrocytes and is the main agent of bovine anaplasmosis. This disease causes severe anemia and reduces weight gain and milk production, thus giving rise to major economic losses relating to livestock worldwide. The genetic diversity of this bacterium has been characterized based on sequences of major surface proteins (MSPs), especially MSP1α. This has enabled identification of several geographical strains, according to different amino acid sequences. The aim of this study was to investigate the genetic diversity of A. marginale in naturally infected Angus beef cattle during a disease outbreak in southeastern Brazil. Four blood samples were collected over a four-month period from each of 20 animals on a cattle farm in Itú, São Paulo, Brazil. Serum samples were subjected to indirect ELISA to detect anti-A. marginale IgG antibodies. The 80 whole-blood samples obtained were subjected to DNA extraction, quantitative real-time PCR (qPCR) for the msp1β gene, semi-nested PCR (snPCR) for the msp1α gene, cloning of the target fragment and sequencing using the Sanger method. The sequences obtained were analyzed for genetic diversity using the RepeatAnalyzer software. Both iELISA tests, using recombinant MSP5 and the Anaplasma antibody test kit (VMRD), revealed high seroprevalence: 91.25% and 97.5%, respectively. In qPCR, 100% of the samples were positive, with between 103 and 107 DNA copies/μL. In the snPCR based on the msp1α gene, 57.5% (46/80) of the samples were positive. Microsatellite analysis on the 36 sequences obtained showed the presence of genotypes H (58.3%), F (25%), E (19.4%), C (2.7%) and G (2.7%). The RepeatAnalyzer software identified 36 strains in the study region, among which some had not previously been described in the literature (13 27 13 27 13 F; 16 FF; τ 27; 63 29 104 29; LJ1 13 LJ1 13; 16 F 17; 16 F 91). High genetic diversity of A. marginale bacteria was found on this farm in Itú, São Paulo.
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Affiliation(s)
- Amanda Barbosa Garcia
- Postgraduate Program in Agricultural Microbiology, Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil; Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Márcia Mariza Gomes Jusi
- Postgraduate Program in Agricultural Microbiology, Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil; Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Carla Roberta Freschi
- Postgraduate Program in Agricultural Microbiology, Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil; Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Inalda Angélica Souza Ramos
- Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Natália Serra Mendes
- Postgraduate Program in Agricultural Microbiology, Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil; Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Renan Bressianini do Amaral
- Postgraduate Program in Agricultural Microbiology, Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil; Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Luiz Ricardo Gonçalves
- Postgraduate Program in Agricultural Microbiology, Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil; Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Marcos Rogério André
- Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil
| | - Rosangela Zacarias Machado
- Immunoparasitology Laboratory, Department of Veterinary Pathology, Faculdade de Ciências Agrárias e Veterinárias - Universidade Estadual Paulista (FCAV / UNESP), Jaboticabal, SP, Brazil.
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Moraga Fernández A, Ortiz JA, Jabbar A, Ghafar A, Cabezas-Cruz A, de la Fuente G, de la Fuente J, Fernández de Mera IG. Fatal cases of bovine anaplasmosis in a herd infected with different Anaplasma marginale genotypes in southern Spain. Ticks Tick Borne Dis 2021; 13:101864. [PMID: 34775293 DOI: 10.1016/j.ttbdis.2021.101864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/05/2020] [Revised: 09/03/2021] [Accepted: 10/16/2021] [Indexed: 10/19/2022]
Abstract
The genus Anaplasma contains various species capable of causing disease in animals and humans. Anaplasma marginale is one of the main tick-borne pathogens of bovines in tropical and subtropical regions; however, these bacteria are now being detected more frequently in other regions of the world including Europe. In July 2017, abortions, mortality and morbidity in Retinta breed of cattle were investigated in southwestern Spain. Based on clinical signs, the provisional clinical diagnosis of bovine anaplasmosis was made. A molecular-phylogenetic approach was used to characterize A. marginale using multiple markers, including 16S rRNA, msp1a, msp4 and msp5 genes. The msp1α sequence was different from the previously described sequences from Spain as well as other countries. The isolates of A. marginale were classified as Genotype C, with two of the five tandem repeats in the amino acid sequences MSP1α being novel. The highest variability was observed in the four sequences of msp5 which was depicted in their clustering into multiple clades on a phylogenetic tree. Comparison of msp5 nucleotide sequences and the corresponding amino acid sequences revealed the co-existence of different strains in the same region. This study highlights the occurrence of clinical bovine anaplasmosis in an endemic region of Spain.
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Affiliation(s)
- Alberto Moraga Fernández
- SaBio. Instituto de Investigación en Recursos Cinegéticos IREC (CSIC-UCLM-JCCM), Ronda de Toledo 12, Ciudad Real 13005, Spain
| | | | - Abdul Jabbar
- Department of Veterinary Biosciences, Melbourne Veterinary School, The University of Melbourne, Werribee, VIC 3030, Australia
| | - Abdul Ghafar
- Department of Veterinary Biosciences, Melbourne Veterinary School, The University of Melbourne, Werribee, VIC 3030, Australia
| | - Alejandro Cabezas-Cruz
- UMR BIPAR, INRAE, ANSES, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort, France
| | - Gabriela de la Fuente
- Sabiotec, Edificio incubadora de empresas UCLM, Camino de Moledores s/n, Ciudad Real 13071, Spain
| | - José de la Fuente
- SaBio. Instituto de Investigación en Recursos Cinegéticos IREC (CSIC-UCLM-JCCM), Ronda de Toledo 12, Ciudad Real 13005, Spain; Department of Veterinary Pathobiology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078, United States
| | - Isabel G Fernández de Mera
- SaBio. Instituto de Investigación en Recursos Cinegéticos IREC (CSIC-UCLM-JCCM), Ronda de Toledo 12, Ciudad Real 13005, Spain.
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Altay K, Erol U, Sahin OF, Aytmirzakizi A. First molecular detection of Anaplasma species in cattle from Kyrgyzstan; molecular identification of human pathogenic novel genotype Anaplasma capra and Anaplasma phagocytophilum related strain. Ticks Tick Borne Dis 2021; 13:101861. [PMID: 34773849 DOI: 10.1016/j.ttbdis.2021.101861] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 06/04/2021] [Revised: 10/18/2021] [Accepted: 10/21/2021] [Indexed: 12/19/2022]
Abstract
Anaplasmosis is a rickettsial infection with significant effects on human and animal health, and the discovery of new species or genotypes with zoonotic potential in recent years has increased this importance. The aim of this study was to provide the first assessment of the molecular etiology and prevalence of bovine anaplasmosis in Kyrgyzstan (specifically in the Chuy, Talas, Djalal-Abad, Naryn, and Issyk-Kul regions). The prevalence of bovine anaplasmosis was determined as 1.7% (6/358). PCR and partial DNA sequencing results of the 16S ribosomal RNA (rRNA) gene revealed that Anaplasma centrale, A. phagocytophilum like-1, and the human pathogenic novel genotype A. capra are circulating in cattle herds in Kyrgyzstan. Six DNA nucleotide sequences obtained in this study were deposited in GenBank under the following accession numbers: A. centrale (MW672117, MW672118, MW672119, MW672120), A. phagocytophilum (MW672121), and A. capra (MW672115).
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Affiliation(s)
- Kursat Altay
- Department of Parasitology, Faculty of Veterinary Medicine, University of Sivas Cumhuriyet, Sivas 58140, Turkey
| | - Ufuk Erol
- Department of Parasitology, Faculty of Veterinary Medicine, University of Sivas Cumhuriyet, Sivas 58140, Turkey.
| | - Omer Faruk Sahin
- Department of Parasitology, Faculty of Veterinary Medicine, University of Sivas Cumhuriyet, Sivas 58140, Turkey
| | - Ayperi Aytmirzakizi
- Faculty of Veterinary Medicine, Kyrgyz-Turkish Manas University, Bishkek 720044, Kyrgyzstan
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Cotes-Perdomo AP, Oviedo Á, Castro LR. Molecular detection of pathogens in ticks associated with domestic animals from the Colombian Caribbean region. Exp Appl Acarol 2020; 82:137-150. [PMID: 32809186 DOI: 10.1007/s10493-020-00531-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 07/31/2020] [Indexed: 06/11/2023]
Abstract
Tick-borne diseases constitute a problem for livestock and public health. Given the socio-economic and environmental conditions of the Colombian Caribbean, ticks are particularly abundant, in turn exposing domestic animals and people in contact with them to such diseases. This study evaluates the presence of Babesia spp., Anaplasma spp., Coxiella spp. and Borrelia spp. in domestic animal ticks (Amblyomma mixtum, A. dissimile, Dermacentor nitens, Rhipicephalus sanguineus and R. microplus) by conventional PCR. Findings show a prevalence of 12.5% of Babesia, 0% of Borrelia, 39.4% of Anaplasma and 52.9% of Coxiella, whereas 6.2% of a total sample of 104 tick pools presented coinfections between Babesia and Anaplasma. Among the molecularly identified species are Ba. vogeli, Ba. bigemina and A. marginale, in addition to two Coxiella species-one being C. mudrowiae and the other similar to an undescribed endosymbiont of Rhipicephalus sp. It is necessary to evaluate the vector capacity of ticks such as A. mixtum, D. nitens and R. sanguineus in the transmission of A. marginale. Moreover, it is necessary to explore the role that bacteria of the genus Coxiella might have both in the health of humans and animals, and in the metabolism and reproduction of ticks. This is the first report on Babesia vogeli and B. bigemina in ticks from the Colombian Caribbean, representing a risk to animal and human health.
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Affiliation(s)
- Andrea P Cotes-Perdomo
- Grupo de Investigación Evolución, Sistemática Y Ecología Molecular (GIESEMOL), Universidad del Magdalena, Santa Marta, Colombia.
| | - Ángel Oviedo
- Grupo de Investigación Evolución, Sistemática Y Ecología Molecular (GIESEMOL), Universidad del Magdalena, Santa Marta, Colombia
| | - Lyda R Castro
- Grupo de Investigación Evolución, Sistemática Y Ecología Molecular (GIESEMOL), Universidad del Magdalena, Santa Marta, Colombia
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André MR, Calchi AC, Herrera HM, Zanatto DCS, Horta BCLS, Tasso JB, de Souza Ramos IA, de Mello VVC, Machado RZ. The co-infection with Ehrlichia minasensis, Anaplasma marginale and Anaplasma platys is not associated with anemia in beef cattle in the Brazilian Pantanal. Vet Parasitol Reg Stud Reports 2020; 21:100437. [PMID: 32862907 DOI: 10.1016/j.vprsr.2020.100437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/11/2020] [Accepted: 07/14/2020] [Indexed: 12/21/2022]
Abstract
The Anaplasmataceae family is composed of obligatory intracellular Gram-negative bacteria transmitted by arthropod vectors. In Brazil, with the exception of Anaplasma marginale, little is known about the occurrence of other Anaplasma and Ehrlichia species infecting cattle. The present study aimed at investigating the occurrence of Anaplasma spp. and Ehrlichia spp. in beef cattle (Bos indicus) sampled in the Brazilian Pantanal, an area prone to periodic flooding and endemic for bovine trypanosomiasis. Blood samples from 400 cattle were collected and screened by PCR assays based on rrs and dsb genes from Anaplasma spp. and Ehrlichia spp., respectively. Positive samples for Anaplasma spp. were subjected to qPCR assays based on the msp-2 gene and nPCR based on the groEL gene. As a result, 4.75% (19/400) and 48.12% (167/347) were positive for Anaplasma platys and Ehrlichia minasensis, respectively. Besides, positivity of 56.75% (227/400) for A. marginale and seropositivity of 90.75% (363/400) for Trypanosoma vivax were found. A high rate of co-infection was observed (67.25%), from which the co-infection by A. marginale and E. minasensis was more frequently found in calves than cows. Interestingly, none of the animals presenting co-infection showed anemia or other clinical signs. The present study showed, for the first time, the occurrence of A. platys and E. minasensis in beef cattle in the southern Pantanal, as well as a high rate of co-infection by A. marginale, E. minasensis and T. vivax in the sampled animals.
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Hove P, Brayton KA, Liebenberg J, Pretorius A, Oosthuizen MC, Noh SM, Collins NE. Anaplasma marginale outer membrane protein vaccine candidates are conserved in North American and South African strains. Ticks Tick Borne Dis 2020; 11:101444. [PMID: 32336660 DOI: 10.1016/j.ttbdis.2020.101444] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 03/16/2020] [Accepted: 04/07/2020] [Indexed: 10/24/2022]
Abstract
Bovine anaplasmosis is a globally economically important tick-borne disease caused by the obligate intraerythrocytic rickettsia, Anaplasma marginale. A live Anaplasma centrale blood-based vaccine is available, but it does not protect against all A. marginale field strains and may also transmit other blood-borne pathogens. Five potential outer membrane protein (OMP) vaccine candidates have been well-characterised in A. marginale strains from the USA, however, their levels of conservation in other countries must be ascertained in order to inform their use in a vaccine with regional or global efficacy. This study assessed the amino acid variation in vaccine candidate OMPs in South African strains of A. marginale, and also compared the immunogenic properties between South African and US strains. OMP genes Am779, Am854, omp7, omp8 and omp9 were amplified and sequenced from a set of genetically diverse South African samples with different msp1α-genotypes. OMPs Am854 and Am779 were highly conserved, with 99-100 % amino acid identity, while Omp7, Omp8 and Omp9 had 79-100 % identity with US strains. As has been shown previously, Omp7-9 possess conserved N- and C- termini, a central variable region, and a highly conserved CD4 T-cell epitope, FLLVDDA(I/V)V, in the N-terminal region. Western blot analysis of recombinant OMPs indicates strong antigenic conservation between South African and US strains of A. marginale, suggesting that they are good candidates for use in a novel global vaccine cocktail, although further work on the best formulation and delivery methods will be necessary.
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Affiliation(s)
- Paidashe Hove
- Vectors and Vector-borne Diseases Research Programme, Department of Veterinary Tropical Diseases, University of Pretoria, Private Bag X04, Onderstepoort, 0110, Pretoria, South Africa; Agricultural Research Council-Biotechnology Platform, Private Bag X5, Onderstepoort, 0110, Pretoria, South Africa
| | - Kelly A Brayton
- Vectors and Vector-borne Diseases Research Programme, Department of Veterinary Tropical Diseases, University of Pretoria, Private Bag X04, Onderstepoort, 0110, Pretoria, South Africa; Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA
| | - Junita Liebenberg
- Agricultural Research Council-Onderstepoort Veterinary Research, Private Bag X5, Onderstepoort, 0110, Pretoria, South Africa
| | - Alri Pretorius
- Agricultural Research Council-Onderstepoort Veterinary Research, Private Bag X5, Onderstepoort, 0110, Pretoria, South Africa
| | - Marinda C Oosthuizen
- Vectors and Vector-borne Diseases Research Programme, Department of Veterinary Tropical Diseases, University of Pretoria, Private Bag X04, Onderstepoort, 0110, Pretoria, South Africa
| | - Susan M Noh
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA; Animal Disease Research Unit, Agricultural Research Service, US Department of Agriculture, Pullman, WA 99164-6630, USA
| | - Nicola E Collins
- Vectors and Vector-borne Diseases Research Programme, Department of Veterinary Tropical Diseases, University of Pretoria, Private Bag X04, Onderstepoort, 0110, Pretoria, South Africa.
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Parvizi O, El-Adawy H, Melzer F, Roesler U, Neubauer H, Mertens-Scholz K. Seroprevalence and Molecular Detection of Bovine Anaplasmosis in Egypt. Pathogens 2020; 9:E64. [PMID: 31963251 PMCID: PMC7168636 DOI: 10.3390/pathogens9010064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 12/09/2019] [Revised: 01/08/2020] [Accepted: 01/13/2020] [Indexed: 11/16/2022] Open
Abstract
Bovine anaplasmosis is a tick-borne disease with zoonotic potential, caused by the obligate intracellular bacterium Anaplasma marginale. The disease is distributed worldwide in tropical and subtropical regions. The economic losses from anaplasmosis in animals is of significant importance because it causes severe morbidity and mortality in cattle. Recovered animals may become persistent carriers. Epidemiological information on the actual status of bovine anaplasmosis in Egypt is scarce. Thus, this study aimed to determine anti-Anaplasma antibody and DNA in serum samples using ELISA and PCR, respectively. In total, 758 bovine sera were collected from cattle farms located in 24 Egyptian governorates in 2015 to 2016. Sera were analyzed with the commercially available 'Anaplasma antibody competitive ELISA v2' kit and 'AmpliTest Anaplasma/Ehrlichia spp. real time TaqMan TM PCR. Anaplasma spp. antibodies were detected in 140 (18.5%) (CI: 15.8-21.4%) of the investigated sera by ELISA, and Anaplasma/Ehrlichia-DNA was detected in 40 (5.3%) (CI: 3.8-7.1%) of the positive sera by real time PCR. Co-detection of both Anaplasma spp. and Coxiella burnetii-specific antibodies was proven in 30 (4%) of the investigated sera. The results of this work confirm the significant prevalence of bovine anaplasmosis in Egypt. Raising awareness in decision makers of the public health, veterinarians and animal owners is required to reduce the spread of infection.
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Affiliation(s)
- Omid Parvizi
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Naumburger Str. 96a, 07743 Jena, Germany; (H.E.-A.); (F.M.); (H.N.); (K.M.-S.)
| | - Hosny El-Adawy
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Naumburger Str. 96a, 07743 Jena, Germany; (H.E.-A.); (F.M.); (H.N.); (K.M.-S.)
- Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
| | - Falk Melzer
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Naumburger Str. 96a, 07743 Jena, Germany; (H.E.-A.); (F.M.); (H.N.); (K.M.-S.)
| | - Uwe Roesler
- Institute for Animal Hygiene and Environmental Health, Free University, Berlin, Robert-von Ostertag-Str. 7-13, 14163 Berlin, Germany;
| | - Heinrich Neubauer
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Naumburger Str. 96a, 07743 Jena, Germany; (H.E.-A.); (F.M.); (H.N.); (K.M.-S.)
| | - Katja Mertens-Scholz
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Naumburger Str. 96a, 07743 Jena, Germany; (H.E.-A.); (F.M.); (H.N.); (K.M.-S.)
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10
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de Souza Ramos IA, Herrera HM, Fernandes SDJ, do Amaral RB, Zanatto DCDS, da Silva TMV, Horta BLS, Campos JBV, Alves JVA, de Macedo GC, Machado RZ, André MR. Genetic diversity of Anaplasma marginale in beef cattle in the Brazilian Pantanal. Ticks Tick Borne Dis 2019; 10:805-814. [PMID: 30930114 DOI: 10.1016/j.ttbdis.2019.03.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 10/05/2018] [Revised: 03/14/2019] [Accepted: 03/21/2019] [Indexed: 11/26/2022]
Abstract
There are few studies on the genetic diversity of Anaplasma marginale in Brazilian cattle herds, especially about beef cattle. The objective of this study was to evaluate the genetic diversity of A. marginale, based on the msp1α gene in Bos taurus indicus sampled from the Brazilian Pantanal. Aliquots of blood with and without EDTA were taken from 400 cattle (200 cows and 200 calves) across five extensive farms. The samples were submitted to the indirect immunoenzymatic assay (iELISA), quantitative real-time PCR (qPCR) for the msp1β gene and to the semi-nested (sn) PCR for the msp1α gene. Positive samples were sequenced by the Sanger method and subjected to diversity analysis using the RepeatAnalyser software. The percentage of positive animals by iELISA, qPCR and (sn) PCR was 72.2% (289/400), 56.7% (227/400) and 23% (52/227), respectively. Cows (154/200) showed to be significantly more seropositive than calves (135/200). In qPCR, the number of calves and average quantification value (138/200; 1.3 × 106) A. marginale msp1α copies per μL proved to be higher when compared to that found for the cows (89/200; 3.9 × 104). The microsatellite analysis of the 26 sequences obtained from the msp1α gene revealed the presence of E (77%), C (15.4%) and B (7.7%) genotypes. Fourteen A. marginale strains were identified in the studied region, with eight that have never before been described in the literature (τ-10-13-13-18; τ-27-18; EV8-EV8-17; α-β-β-β-100; EV7-11-10-15; τ-11-11-27-18; τ-11-10-15; τ-27-13-18). Beef cattle are highly exposed to A. marginale in the Brazilian Pantanal. Moreover, a high genetic diversity of A. marginale, with eight new strains, was found in the studied region. While cows may act as chronic carriers, perpetuating the pathogen within the herd, male beef calves sold to other regions may disperse these strains.
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Affiliation(s)
- Inalda Angélica de Souza Ramos
- Universidade Estadual Paulista (Unesp), Faculty of Agrarian and Veterinary Sciences, Jaboticabal, SP, Brazil; "Graduate Program in Veterinary Medicine, Animal Pathology, Host-Parasite Relationship, State University of São Paulo (UNESP), Faculty of Agrarian and Veterinary Sciences, UNESP Jaboticabal", Brazil
| | | | - Simone de Jesus Fernandes
- Universidade Estadual Paulista (Unesp), Faculty of Agrarian and Veterinary Sciences, Jaboticabal, SP, Brazil
| | - Renan Bressianini do Amaral
- Universidade Estadual Paulista (Unesp), Faculty of Agrarian and Veterinary Sciences, Jaboticabal, SP, Brazil
| | | | | | - Bruna Le Senechal Horta
- Universidade Estadual Paulista (Unesp), Faculty of Agrarian and Veterinary Sciences, Jaboticabal, SP, Brazil
| | | | | | | | - Rosangela Zacarias Machado
- Universidade Estadual Paulista (Unesp), Faculty of Agrarian and Veterinary Sciences, Jaboticabal, SP, Brazil
| | - Marcos Rogério André
- Universidade Estadual Paulista (Unesp), Faculty of Agrarian and Veterinary Sciences, Jaboticabal, SP, Brazil.
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11
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Chilton NB, Dergousoff SJ, Lysyk TJ. Prevalence of Anaplasma bovis in Canadian populations of the Rocky Mountain wood tick, Dermacentor andersoni. Ticks Tick Borne Dis 2018; 9:1528-1531. [PMID: 30064965 DOI: 10.1016/j.ttbdis.2018.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 04/10/2018] [Revised: 07/02/2018] [Accepted: 07/03/2018] [Indexed: 11/18/2022]
Abstract
PCR and DNA sequencing were used to determine the prevalence of Anaplasma bovis in Rocky Mountain wood ticks (Dermacentor andersoni) collected in Alberta and Saskatchewan, Canada. These analyses revealed that A. bovis DNA was present in 35 (2.1%) of 1679 ticks collected at 12 of the 24 localities. The discovery of A. bovis in host-seeking female and male D. andersoni from multiple locations in southern Canada may have important implications for diagnosis of anaplasmosis in Canada.
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Affiliation(s)
- Neil B Chilton
- Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, Saskatchewan, S7N 5E2, Canada.
| | - Shaun J Dergousoff
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, T1J 4B1, Canada
| | - Timothy J Lysyk
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, T1J 4B1, Canada
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