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Junsiri W, Watthanadirek A, Poolsawat N, Minsakorn S, Srionrod N, Nooroong P, Sangchuai S, Chawengkirttikul R, Glab-ampai K, Anuracpreeda P. Anaplasma marginale: Molecular discrimination, recombinant expression and characterization of major surface protein 2. Res Vet Sci 2022; 152:372-386. [DOI: 10.1016/j.rvsc.2022.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/07/2022] [Accepted: 08/21/2022] [Indexed: 11/24/2022]
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Teixeira V, Lana A, Bresolin T, Tomich T, Souza G, Furlong J, Rodrigues J, Coelho S, Gonçalves L, Silveira J, Ferreira L, Facury Filho E, Campos M, Dorea J, Pereira L. Using rumination and activity data for early detection of anaplasmosis disease in dairy heifer calves. J Dairy Sci 2022; 105:4421-4433. [DOI: 10.3168/jds.2021-20952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 01/08/2022] [Indexed: 11/19/2022]
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Bisen S, Aftab A, Jeeva K, Silamparasan M, Yadav S, Chandra D, Sankar M, Garg R, Raina OK. Molecular and serological detection of Anaplasma infection in carrier cattle in north India. VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2021; 24:100550. [PMID: 34024367 DOI: 10.1016/j.vprsr.2021.100550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 11/18/2022]
Abstract
Anaplasma marginale infection in cattle (n = 216) in the states of Uttar Pradesh and Uttarakhand, North India was screened by microscopy and nested-polymerase chain reaction (PCR). Two recombinant proteins viz. major surface protein (MSP) 5 and MSP2 of A. marginale were expressed in Escherichia coli and their potential in the detection of antibodies to Anaplasma species in the cattle was evaluated by immunoglobulin G-enzyme linked immunosorbent assay (IgG-ELISA). The MSP5 IgG ELISA results were compared with competitive (c) inhibition ELISA. Microscopy being the least sensitive diagnostic test detected 12.0% of animals positive for A. marginale infection while nested-PCR detected 87.9% of these animals as positive for A. marginale infection. The recombinant MSP5 antigen showed positive reactivity in 170/190 nested-PCR confirmed positive animals (sensitivity 89.5%) with specificity of 77.0%. In comparison, the recombinant MSP2 antigen showed lesser sensitivity and specificity of 79.0% and 69.2%, respectively. The cELISA was more sensitive and specific than IgG-ELISA. However, molecular detection by msp5 nested-PCR was highly sensitive and reliable for detection of carrier cattle for Anaplasma infection. The study indicated that a large cattle population (87.9%) was carrier for A. marginale infection in this region of the country.
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Affiliation(s)
- Savita Bisen
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Andleeb Aftab
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - K Jeeva
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - M Silamparasan
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Shobha Yadav
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Dinesh Chandra
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - M Sankar
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Rajat Garg
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - O K Raina
- Division of Parasitology, ICAR-Indian Veterinary Research Institute, Izatnagar, India.
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Galindo RC, Ayllón N, Smrdel KS, Boadella M, Beltrán-Beck B, Mazariegos M, García N, de la Lastra JMP, Avsic-Zupanc T, Kocan KM, Gortazar C, de la Fuente J. Gene expression profile suggests that pigs (Sus scrofa) are susceptible to Anaplasma phagocytophilum but control infection. Parasit Vectors 2012; 5:181. [PMID: 22935149 PMCID: PMC3453518 DOI: 10.1186/1756-3305-5-181] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 08/12/2012] [Indexed: 11/26/2022] Open
Abstract
Background Anaplasma phagocytophilum infects a wide variety of hosts and causes granulocytic anaplasmosis in humans, horses and dogs and tick-borne fever in ruminants. Infection with A. phagocytophilum results in the modification of host gene expression and immune response. The objective of this research was to characterize gene expression in pigs (Sus scrofa) naturally and experimentally infected with A. phagocytophilum trying to identify mechanisms that help to explain low infection prevalence in this species. Results For gene expression analysis in naturally infected pigs, microarray hybridization was used. The expression of differentially expressed immune response genes was analyzed by real-time RT-PCR in naturally and experimentally infected pigs. Results suggested that A. phagocytophilum infection affected cytoskeleton rearrangement and increased both innate and adaptive immune responses by up regulation of interleukin 1 receptor accessory protein-like 1 (IL1RAPL1), T-cell receptor alpha chain (TCR-alpha), thrombospondin 4 (TSP-4) and Gap junction protein alpha 1 (GJA1) genes. Higher serum levels of IL-1 beta, IL-8 and TNF-alpha in infected pigs when compared to controls supported data obtained at the mRNA level. Conclusions These results suggested that pigs are susceptible to A. phagocytophilum but control infection, particularly through activation of innate immune responses, phagocytosis and autophagy. This fact may account for the low infection prevalence detected in pigs in some regions and thus their low or no impact as a reservoir host for this pathogen. These results advanced our understanding of the molecular mechanisms at the host-pathogen interface and suggested a role for newly reported genes in the protection of pigs against A. phagocytophilum.
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Affiliation(s)
- Ruth C Galindo
- Instituto de Investigación en Recursos Cinegéticos IREC-CSIC-UCLM-JCCM, Ronda de Toledo s/n, Ciudad Real 13005, Spain
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Standardization of an Indirect ELISA for Serological Diagnosis of Aspergilloma. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2012. [DOI: 10.5812/archcid.14467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tembue AAM, da Silva JB, da Silva FJM, Pires MS, Baldani CD, Soares CO, Massard CL, da Fonseca AH. Seroprevalence of IgG antibodies against Anaplasma marginale in cattle from south Mozambique. ACTA ACUST UNITED AC 2012; 20:318-24. [PMID: 22166387 DOI: 10.1590/s1984-29612011000400011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Accepted: 07/13/2011] [Indexed: 11/22/2022]
Abstract
The current study aimed to investigate the seroprevalence of IgG antibodies to Anaplasma marginale in cattle from Maputo, Gaza and Inhambane provinces, south Mozambique. A total of 809 serum samples from cattle were obtained and tested by indirect enzyme-linked immunosorbent assay (i-ELISA). The chi-square test at 5% significance was used to assess the association between seroprevalence and the variables gender, age and geographic origin of animals. The overall seropositivity was 76.5% (n = 619) and anti-A. marginale antibodies were detected in 89.1% (n = 156), 68.4% (n = 308) and 84.2% (n = 155) of the animals in the provinces of Maputo, Gaza and Inhambane, respectively. A significant association (p < 0.05) was found with the geographic origin of the animals, while sex had no significant relationship. The frequencies of seropositive in the age groups were 63.2% (n = 72), 80.0% (n = 92), 83.1% (n = 98) and 77.3% (n = 357) for animals <12; >12 and ≤24; >24 and ≤36; >36 months, respectively. These results indicate that in southern Mozambique there are areas of enzootic stability to A. marginale. Thus, epidemiological monitoring is required to monitor the immune status of animals in the region.
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Affiliation(s)
- António Amélia Mucalane Tembue
- Curso de Pós-Graduação em Ciências Veterinárias, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
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Functional epitope core motif of the Anaplasma marginale major surface protein 1a and its incorporation onto bioelectrodes for antibody detection. PLoS One 2012; 7:e33045. [PMID: 22427942 PMCID: PMC3299730 DOI: 10.1371/journal.pone.0033045] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 02/09/2012] [Indexed: 11/19/2022] Open
Abstract
Anaplasmosis, a persistent intraerythrocytic infection of cattle by Anaplasma marginale, causes severe anemia and a higher rate of abortion, resulting in significant loss to both dairy and beef industries. Clinical diagnosis is based on symptoms and confirmatory laboratory tests are required. Currently, all the diagnostic assays have been developed with whole antigens with indirect ELISA based on multiple epitopes. In a pioneer investigation we demonstrated the use of critical motifs of an epitope as biomarkers for immunosensor applications. Mimotopes of the MSP1a protein functional epitope were obtained through Phage Display after three cycles of selection of a 12-mer random peptide library against the neutralizing monoclonal antibody 15D2. Thirty-nine clones were randomly selected, sequenced, translated and aligned with the native sequence. The consensus sequence SxSSQSEASTSSQLGA was obtained, which is located in C-terminal end of the 28-aa repetitive motif of the MSP1a protein, but the alignment and sequences' variation among mimotopes allowed us to map the critical motif STSSxL within the consensus sequence. Based on these results, two peptides were chemically synthesized: one based on the critical motif (STSSQL, Am1) and the other based on the consensus sequence aligned with the native epitope (SEASTSSQLGA, Am2). Sera from 24 infected and 52 healthy animals were tested by ELISA for reactivity against Am1 and Am2, which presented sensitivities of 96% and 100%, respectively. The Am1 peptide was incorporated onto a biolectrode (graphite modified with poly-3-hydroxyphenylacetic acid) and direct serum detection was demonstrated by impedance, differential pulse voltammetry, and atomic force microscopy. The electrochemical sensor system proved to be highly effective in discriminating sera from positive and negative animals. These immunosensors were highly sensitive and selective for positive IgG, contaminants did not affect measurements, and were based on a simple, fast and reproducible electrochemical system.
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Picoloto G, Lima RFD, Olegário LAO, Carvalho CME, Lacerda ACR, Tomás WM, Borges PAL, Pellegrin AO, Madruga CR. Real time polymerase chain reaction to diagnose Anaplasma marginale in cattle and deer (Ozotoceros bezoarticus leucogaster) of the Brazilian Pantanal. ACTA ACUST UNITED AC 2011; 19:186-8. [PMID: 20943025 DOI: 10.1590/s1984-29612010000300012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 06/15/2010] [Indexed: 11/22/2022]
Abstract
Epizootiological study of Anaplasma marginale in regions that contain various reservoir hosts, co-existence of rickettsia pathogens, and common vectors is a complicated task. To achieve diagnosis of this rickettsia in cattle and campeiro deer of Brazilian Pantanal, a comparison was made between a real time polymerase chain reaction (RT-PCR) with intercalating Sybr Green fluorochrome and primers based on msp5 gene of A. marginale; a conventional PCR (C-PCR); and parasitological examination using thin blood smear stained with Giemsa-MayGrunwald. Both PCRs showed good performance in the diagnosis of A. marginale in cattle, and were superior to the parasitological exam. The RT-PCR detected seven positive campeiro deer (16.3%). This rate was significantly higher compared to C-PCR, which identified one animal as positive (2.3%), and also compared to parasitological diagnosis, which did not find any positive animals. The dissociation temperature average of positive reactions in cattle (81.72 °C ± 0.20) was identical to dissociation temperature found in the cervids (81.72 °C ± 0.12), suggesting that both animal species were infected with A. marginale. We concluded that RT-PCR can be used for A. marginale diagnosis and in epizootiological studies of cattle and cervids; in spite of the small number of campeiro deer samples, the results indicated that this wildlife species has importance in the Anaplasma epizootiology in the Brazilian Pantanal.
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Affiliation(s)
- Graziela Picoloto
- Programa de Mestrado em Ciência Animal, Universidade Federal de Mato Grosso do Sul-UFMS, bolsista Fundect, Av. Felinto Muller 2443, CP 549, CEP 79070-900, Bairro Ipiranga, Campo Grande-MS, Brazil.
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Oliveira JB, Montoya J, Romero JJ, Urbina A, Soto-Barrientos N, Melo ESP, Ramos CAN, Araújo FR. Epidemiology of bovine anaplasmosis in dairy herds from Costa Rica. Vet Parasitol 2010; 177:359-65. [PMID: 21236580 DOI: 10.1016/j.vetpar.2010.12.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Revised: 12/05/2010] [Accepted: 12/07/2010] [Indexed: 11/16/2022]
Abstract
Bovine anaplasmosis is endemic and occurs in almost all areas of livestock production of Costa Rica. The aim of this study was to determine the seroprevalence and risk factors of anaplasmosis in dairy farms of Costa Rica by the recombinant truncated MSP-5 (rMSP-5) enzyme-linked immunosorbent assay (ELISA). Serum samples were obtained from 733 cattle from 20 commercial dairy herds of Costa Rica. The overall seroprevalence was 37.2% and herd seroprevalence ranged from 20.0 to 72.0%. The age-specific seroprevalence was 49.3% in young and 33.4% in adult animals. The main risk factors associated with seroprevalence were season of occurrence of clinical cases (rainy season) (OR=22.8), presence of tabanids (OR=9.5) and stable flies (OR=6.2), stable flies control measures (OR=3.2), non-use of ear tattoos (OR=2.8), interval of veterinary visit (≤ 60 days) (OR=2.7), altitude of the farms (<800 masl) (OR=2.6) and age (<2 years) (OR=1.8). The results indicated that exposure of cattle to Anaplasma marginale is common in dairy herds of Costa Rica and endemic instability situation probably is due to inadequate vector control.
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Affiliation(s)
- J B Oliveira
- Cátedra de Parasitologia, Departamento de Biologia, Universidade Federal Rural de Pernambuco (UFRPE), Dom Manoel de Medeiros SN, Recife, CEP 52171-900, Pernambuco, Brazil.
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Ramos RAN, Ramos CAN, Araújo FR, Melo ESP, Tembue AASM, Faustino MAG, Alves LC, Rosinha GMS, Elisei C, Soares CO. Detecção de anticorpos para Anaplasma sp. em pequenos ruminantes no semi-árido do estado de Pernambuco, Brasil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2008; 17:115-7. [DOI: 10.1590/s1984-29612008000200011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Accepted: 04/09/2008] [Indexed: 11/22/2022]
Abstract
Neste trabalho é descrita a detecção de anticorpos para Anaplasma sp. em caprinos e ovinos da região do semi-árido do Estado de Pernambuco, Brasil, utilizando-se um ensaio de imunoadsorção enzimática baseado em MSP5 recombinante de Anaplasma marginale. Foram analisados soros de 243 caprinos e 68 ovinos provenientes do município de Ibimirim, e observadas freqüências de anticorpos de 11,93% (29/243) e 16,17% (11/68) para caprinos e ovinos, respectivamente. A importância epidemiológica dos achados foi discutida.
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Guedes Junior DS, Araújo FR, Silva FJ, Rangel CP, Barbosa Neto JD, Fonseca AH. Frequency of antibodies to Babesia bigemina, B. bovis, Anaplasma marginale, Trypanosoma vivax and Borrelia burdgorferi in cattle from the northeastern region of the state of Pará, Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2008; 17:105-9. [DOI: 10.1590/s1984-29612008000200008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Accepted: 06/24/2008] [Indexed: 11/22/2022]
Abstract
Babesiosis, anaplasmosis, and trypanosomosis are relevant diseases, potentially causing morbidity in cattle, leading to economic losses. Borreliosis is import as a potential zoonosis. The objective of this study was to determine, by indirect enzyme-linked immunosorbent assay (ELISA), the frequency of seropositive cattle to Babesia bigemina, B. bovis, Anaplasma marginale, Trypanosoma vivax and Borrelia burgdorferi in cattle from the Northeastern region of Pará, Brazil. Sera samples from 246 female adult cattle from municipalities of Castanhal and São Miguel do Guamá were used. Crude antigens ELISAs were used to detect antibodies to all agents, except to A. marginale, to which an indirect ELISA with recombinant major surface 1a protein (MSP1a) antigen was used. Overall frequencies of seropositive animals were: B. bigemina - 99.2%; B. bovis - 98.8%; A. marginale - 68.3%; T. vivax - 93.1% and B. burgdorferi - 54.9%. The frequencies of seropositive cattle to B. bovis and B. bigemina suggest a high rate of transmission of these organisms by tick in the studied region, which can be classified as enzootically stable to these hemoprotozoans. The low frequency of seropositive cattle to A. marginale may be attributed to a lower sensitivity of the recombinant antigen ELISA utilized or a distinct rate of inoculation of this rickettsia by ticks, as compared with Babesia sp. transmission. The high frequency of seropositive cattle to T. vivax indicates that this hemoprotozoan is prevalent in herds from the Northeastern region of Pará. The rate of animal that showed homologues antibodies to B. burgdorferi indicates the presence of the tickborne spirochaetal agent in the cattle population in the studied region.
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Ramos CA, Araújo FR, Osório AL, Madruga CR, Rosinha GMS, Soares CO, Elisei C. Transcrição de genes de proteínas de membrana de isolados brasileiros de Anaplasma marginale. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2007; 16:152-5. [DOI: 10.1590/s1984-29612007000300007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2007] [Accepted: 07/09/2007] [Indexed: 11/22/2022]
Abstract
Este trabalho demonstra o padrão de transcrição de genes de proteínas de membrana em três isolados brasileiros de A. marginale (Rio Grande do Norte, Pernambuco-Zona da Mata e Pernambuco-Sertão). O RNA foi purificado a partir de sangue de bovinos infectados experimentalmente com os três isolados de A. marginale. Após transcrição reversa, os genes omp1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13 e 14; opag1-3; virB3, 9, 10; am097, 197, 254, 854 e 956 foram amplificados por PCR, com oligonucleotídeos iniciadores específicos. Detectaram-se transcritos para todos os genes analisados, exceto omp2, 3 e opag3 em todos os isolados e do gene omp7 em um dos isolados estudados. A ausência de transcrito para os genes opag3 e omp7 diverge do observado em isolados americanos da riquétsia. Possíveis razões para essas diferenças são discutidas.
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Melo ES, Araújo FR, Ramos CA, Soares CO, Rosinha GM, Elisei C, Madruga CR. ELISA com MSP5 recombinante truncada para detecção de anticorpos contra Anaplasma marginale em bovinos. PESQUISA VETERINARIA BRASILEIRA 2007. [DOI: 10.1590/s0100-736x2007000700008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Os objetivos deste estudo foram produzir e solubilizar a proteína MSP5 recombinante truncada de Anaplasma marginale, e avaliar seu desempenho em um ensaio de imunoadsorção enzimática indireto (ELISA) para detecção de anticorpos contra a riquétsia. O gene msp5, exceto a região N-terminal hidrofóbica, foi amplificado por PCR, clonado em plasmídeo pTrcHis-TOPO e expresso em Escherichia coli. A solubilização da proteína recombinante foi avaliada em diferentes pHs e concentrações de uréia. A sensibilidade e a especificidade do ensaio foram avaliados testando-se 66 soros de animais infectados experimentalmente com A. marginale e 96 soros negativos, com o estado de infecção destes animais confirmado por PCR. Um total de 1.666 amostras de soros bovino, provenientes do Brasil - Rio Grande do Sul (73), Mato Grosso do Sul (91), Pernambuco (86), Bahia (314) e Minas Gerais (267)-, Uruguai (32) e Costa Rica (803) foram testadas nos ELISAs com MSP5 truncada e com MSP1a recombinantes e a concordância entre os dois testes foi avaliada. O ELISA indireto com MSP5 truncada foi capaz de detectar animais infectados com 96,97% de sensibilidade e 100% de especificidade. Nos animais infectados experimentalmente, o ELISA detectou anticorpos do 12º até o último dia de observação (37º dia). Os ELISAs para MSP5 e MSP1a apresentaram concordância de 95,67%, com índice kappa de 0,81. Os resultados discordantes apresentaram uma diferença significativa (p <0,001). Anticorpos contra A. marginale foram detectados em animais de todas as regiões estudadas. O ELISA com MSP5 recombinante truncada apresentou bom desempenho na detecção de anticorpos contra A. marginale, com alta sensibilidade e especificidade, representando uma importante ferramenta para o diagnóstico da anaplasmose bovina em estudos epidemiológicos.
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Barros SL, Madruga CR, Araújo FR, Menk CF, de Almeida MAO, Melo EPS, Kessler RH. Serological survey of Babesia bovis, Babesia bigemina, and Anaplasma marginale antibodies in cattle from the semi-arid region of the state of Bahia, Brazil, by enzyme-linked immunosorbent assays. Mem Inst Oswaldo Cruz 2005; 100:513-7. [PMID: 16302060 DOI: 10.1590/s0074-02762005000600003] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The objectives of this work were to determine the prevalence of Babesia bovis, Babesia bigemina, and Anaplasma marginale detecting antibodies in cattle raised in the semi-arid region of the state of Bahia, Brazil, through indirect enzyme linked immunosorbent assays (ELISA) and to compare the performances of indirect enzyme-linked immunosorbent assays with crude (I-ELISA-CrAnaAg) and recombinant major surface protein-5 (I-ELISA-MSP-5Ag), as antigens to detect antibodies against A. marginale. An stable enzootic area was found in Senhor do Bonfim and Euclides da Cunha for B. bovis that showed 86 and 95.5% of prevalence, respectively, and for B. bigemina with 90.8 and 91.3%. On the other hand, Uauá and Juazeiro, were characterized as enzootically unstable areas, since prevalences were: B. bovis--63.7 and 56.4% and B. bigemina--53 and 54.8%, respectively. The prevalence of A. marginale in the four municipalities was above 97% with I-ELISA-CrAnaAg and 94.8% with I-ELISA-MSP-5Ag which is an indication of stable enzootic condition for the rickettsia. The I-ELISA-CrAnaAg and I-ELISA-MSP-5Ag showed a highly significant association (r = 0.977), which means that both ELISA tests are suitable for epidemiological studies of A. marginale.
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Affiliation(s)
- Silvia L Barros
- Departamento de Patologia e Clínica Veterinária, Escola de Medicina Veterinária, Universidade Federal da Bahia, Salvador, BA, Brasil
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