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Kamani J, Vieira TSWJ, da Costa Vieira RF, Shekaro A, Nahum-Biala Y, Olubade T, Abasiama MS, Gajibo UA, Bukar L, Shand M, Harrus S, Baneth G. Molecular detection of Theileria annulata, Theileria mutans and Theileria velifera but no evidence of Theileria parva infected or vaccinated cattle in Nigeria despite extensive transboundary migrations. Vet Parasitol Reg Stud Reports 2023; 41:100887. [PMID: 37208076 DOI: 10.1016/j.vprsr.2023.100887] [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: 12/16/2022] [Revised: 04/11/2023] [Accepted: 05/03/2023] [Indexed: 05/21/2023]
Abstract
The extensive livestock management system predominant in Nigeria necessitates active disease surveillance for the early detection and prompt control of transboundary animal diseases. Theileriae are obligate intracellular protozoa which infect both wild and domestic bovidae throughout much of the world causing East Coast Fever (Theileria parva), Tropical or Mediterranean theileriosis (Theileria annulata) or benign theileriosis (Theileria mutans; Theileria velifera). This study aimed to detect and characterize Theileria spp. infecting cattle in Nigeria using conventional PCR and sequencing approach. Five hundred and twenty-two DNA samples obtained from different cattle blood samples were subjected to PCR targeting the 18S rRNA gene of piroplasmida and specifically, the p104 kDa and Tp1 genes for the evidence of infection or vaccination respectively, with T. parva. A total of 269 out of 522 (51.5%) of the cattle tested PCR- positive for DNA of piroplasmida. Nucleotide sequence and phylogenetic analyses showed that the cattle were infected with T. annulata, T. mutans and T. velifera. Piroplasmida DNA was associated with sex (ꭓ2 = 7.2; p = 0.007), breed (ꭓ2 = 115; p = 0.000002) of animals and the state where the samples were collected (ꭓ2 = 78.8; p = 0.000002). None of the samples tested positive for T. parva DNA or showed evidence of vaccination (Tp1 gene). This is the first report on the molecular detection and characterization of T. annulata in the blood of cattle from Nigeria. Continuous surveillance of Nigerian cattle for East Coast Fever (ECF) is encouraged considering the recent report of the disease in cattle in the neighboring country, Cameroon, where unregulated transboundary cattle movement into Nigeria has been observed.
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Affiliation(s)
- Joshua Kamani
- National Veterinary Research Institute (NVRI), PMB 01 Vom, Plateau State, Nigeria.
| | | | - Rafael Felipe da Costa Vieira
- Vector-borne Diseases Laboratory, Department of Veterinary Medicine, Universidade Federal do Parana, Brazil; Department of Public Health Sciences, University of North Carolina at Charlotte, Charlotte, USA; Center for Computational Intelligence to Predict Health and Environmental Risks (CIPHER), University of North Carolina at Charlotte, Charlotte, USA
| | - Audu Shekaro
- National Veterinary Research Institute (NVRI), PMB 01 Vom, Plateau State, Nigeria
| | - Yaarit Nahum-Biala
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Toyin Olubade
- National Veterinary Research Institute (NVRI), PMB 01 Vom, Plateau State, Nigeria
| | | | - Umar A Gajibo
- National Veterinary Research Institute (NVRI), PMB 01 Vom, Plateau State, Nigeria
| | - Laminu Bukar
- National Veterinary Research Institute (NVRI), PMB 01 Vom, Plateau State, Nigeria
| | - Mike Shand
- School of Geographical & Earth Sciences, University of Glasgow, UK
| | - Shimon Harrus
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Gad Baneth
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
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Marwaha S, Brar B, Jain VK, Poonia R, Prasad M. Multiplex PCR for rapid differential diagnosis of co-prevalent species of Theileria (Theileria annulata and Theileria orientalis) in cattle. Parasitol Res 2023. [PMID: 36897381 DOI: 10.1007/s00436-023-07819-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 03/05/2023] [Indexed: 03/11/2023]
Abstract
Theileriosis is a tick-borne disease that causes enormous losses in the dairy industry. There are several species of Theileria that can infect bovines. Generally, more than one species are prevalent in any geographical area; thus, chances of co-infections are high. Differentiation of these species may not be possible by microscopic examination or serological tests. Therefore, in this study, a multiplex PCR assay was standardized and evaluated for rapid and simultaneous differential detection of two species of Theileria viz., Theileria annulata and Theileria orientalis. Species-specific primers were designed to target the merozoite piroplasm surface antigen gene (TAMS1) of T. annulata and the major piroplasm surface protein gene of T. orientalis, yielding specific amplicon of 229 bp and 466 bp, respectively. The sensitivity of multiplex PCR was 102 and 103 copies for T. annulata and T. orientalis, respectively. The simplex and multiplex PCRs were specific and showed no cross-reactivity with other hemoprotozoa for either primer. For comparative evaluation, blood samples from 216 cattle were tested by simplex and multiplex PCR for both species. Using multiplex PCR, 131 animals were found infected for theileriosis, of which 112 were infected with T. annulata, five were infected with T. orientalis, and 14 had mixed infections. This is the first report of T. orientalis from Haryana, India. Representative sequences of T. annulata (ON248941) and T. orientalis (ON248942) were submitted in GenBank. The standardized multiplex PCR assay used in this study was specific, sensitive, for the screening of field samples.
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Nhokwara SM, Kono H, Kubota S, Jubenkanda M. Communication medium in theileriosis control: the factors that determine disease knowledge among smallholder farmers in Zimbabwe. Trop Anim Health Prod 2023; 55:83. [PMID: 36795138 PMCID: PMC9933804 DOI: 10.1007/s11250-023-03466-x] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 01/17/2023] [Indexed: 02/17/2023]
Abstract
Theileriosis is one of the most important tick-borne diseases that has been affecting farmers and thousands of livestock in Zimbabwe. The main government strategy to combat theileriosis is use of plunge dips with anti-tick chemicals at specified times; however, an increase in number of farmers caused a strain on government services resulting in disease outbreak. One of the key issues that have been highlighted by department of veterinary is the strain in communication and knowledge of the disease with the farmers. Hence, it is important to evaluate the communication between farmers and veterinary services and identify possible areas of strain. A field survey was conducted with 320 farmers in Mhondoro Ngezi, a district badly affected by theileriosis. Face-to-face interviews with smallholders and communal farmers were conducted between September and October 2021, and the data were analyzed using Stata 17. Communal farmers relied mainly on oral communication and had limited knowledge of theileriosis; therefore, dead cattle % was high among them. Though veterinary extension officers were the prime source of information, oral communication medium affected knowledge transferred. The results of this study recommend adoption of communication mediums that encourage retention, such as brochures and posters by veterinary extension services. The government may also partner with private players to ease pressure of increased farming population due to land reform.
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Affiliation(s)
- Shelton M. Nhokwara
- Doctor Program of Animal Science and Agriculture - Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido Japan
| | - Hiroichi Kono
- Department of Agro-environmental Science, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Obihiro, Japan.
| | - Satoko Kubota
- Department of Agro-environmental Science, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido Obihiro, Japan
| | - Mark Jubenkanda
- Department of Veterinary Services, Ministry of Lands, Agriculture, Fisheries, Water, Climate and Rural Development, Harare, Zimbabwe
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Buvanesvaragurunathan K, Ganesh J, Nagul Kumar S, Porchezhiyan V, Radha A, Azhahianambi P, Pandikumar P, Ignacimuthu S. In vitro growth inhibitory effect of selected 18β-glycyrrhetinic acid esters on Theileriaannulata. Exp Parasitol 2022; 236-237:108258. [PMID: 35421387 DOI: 10.1016/j.exppara.2022.108258] [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: 10/12/2021] [Revised: 03/17/2022] [Accepted: 04/03/2022] [Indexed: 11/04/2022]
Abstract
Glycyrrhetinic acid (GA) is one of the important Pentacyclic Triterpenoids (PT) found in the roots of licorice. This study aimed to evaluate the in vitro growth inhibitory effect of 18β-GA (18β-Glycyrrhetinic acid) and C-30 esters against Theileria annulata, the causative agent of Tropical Bovine Theileriosis. C-30 esters of 18β-GA were synthesized and their structures were elucidated using spectroscopy. The pharmacodynamic properties of 18β-GA and its C-30 esters were predicted using DataWarrior and Swiss ADME tools. Cattle isolates of T. annulata schizont-infected bovine lymphoblastoid cells were cultured using standard conditions and the growth inhibitory effect of GA and its esters were evaluated using MTT assay. The isopropyl ester of 18β-GA (GI50- 1.638 μM; R2- 0.818) showed improved anti-theileriosis efficacy than other 18β-GA derivatives. The propyl (GI50 - 5.549 μM), ethyl (GI50 - 5.638 μM), and benzyl (GI50 - 7.431 μM) esters also showed considerable inhibitory effect. The GI50 value for 18β-GA was recorded as 6.829 μM. This study throws light on the usefulness of 18β-GA and its esters for the treatment of Tropical Bovine Theileriosis.
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Affiliation(s)
- K Buvanesvaragurunathan
- PG and Research Department of Botany, Bharathi Women's College, Broadway Road, George Town, Chennai, Tamil Nadu, 600108, India
| | - J Ganesh
- Translational Research Platform for Veterinary Biologicals, Tamil Nadu Veterinary and Animal Sciences University, Chennai, Tamil Nadu, 600 051, India
| | - S Nagul Kumar
- PG and Research Department of Botany, Bharathi Women's College, Broadway Road, George Town, Chennai, Tamil Nadu, 600108, India
| | - V Porchezhiyan
- PG and Research Department of Botany, Bharathi Women's College, Broadway Road, George Town, Chennai, Tamil Nadu, 600108, India
| | - A Radha
- PG and Research Department of Botany, Bharathi Women's College, Broadway Road, George Town, Chennai, Tamil Nadu, 600108, India
| | - P Azhahianambi
- Translational Research Platform for Veterinary Biologicals, Tamil Nadu Veterinary and Animal Sciences University, Chennai, Tamil Nadu, 600 051, India.
| | - P Pandikumar
- Xavier Research Foundation, St Xavier's College, Palayamkottai, Tamil Nadu, 627 002, India.
| | - S Ignacimuthu
- Xavier Research Foundation, St Xavier's College, Palayamkottai, Tamil Nadu, 627 002, India.
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Naveed M, Ijaz M, Ahmed A, Ghumman NZ, Ishaq M, Muzammil I, Javed MU. Molecular evidence, risk factors analysis, and hematological alterations associated with Theileria spp. spillover in captive wild mouflon sheep in Punjab, Pakistan. Iran J Vet Res 2022; 23:349-357. [PMID: 36874179 PMCID: PMC9984143 DOI: 10.22099/ijvr.2022.43496.6362] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 09/13/2022] [Accepted: 10/09/2022] [Indexed: 03/07/2023]
Abstract
Background Landscape anthropization and interaction between domestic and wild animals are the major contributing factors involved in the emergence of new pathogens in wild animals. Theileriosis is an emerging issue of wild ungulates, especially in the tropical and subtropical areas of the globe. Aims The current study investigated the mouflon sheep for Theileria infection using molecular methods and hematological analysis. Methods This study was conducted on a total of 103 captive wild mouflon sheep present in eight different recreational zoos, and wildlife parks in Punjab, Pakistan to investigate the genotypic prevalence of Theileria spp. by targeting 18S rRNA and molecular evidence for Theileria spillover between domestic and wild mouflon sheep by phylogenetic analysis. The association of assumed risk factors and the effect of Theileria spp. on various hematological parameters were also assessed. Results The results depicted that Theileria spp. was prevalent in 8 (7.77%, CI 95%: 3.99-14.59%), and 11 (10.68%, CI 95%: 06.07-18.12%) animals based on microscopy, and PCR, respectively. The phylogenetic analysis of the 18S rRNA gene of Theileria spp. from mouflon revealed a close resemblance with T. annulata from domestic animals. The risk factor analysis revealed that tick infestation, enclosure hygiene, previous tick infestation history, and the presence of wooden logs in the enclosure were significantly (P<0.05) associated with the occurrence of Theileria spp. infection in the captive mouflon sheep of Pakistan. Furthermore, a significant reduction in blood parameters like PCV, RBCs count, Hb, and platelets was observed in Theileria-positive animals. Conclusion This study is the first evidence at the molecular level to characterize the spillover of Theileria spp. between the captive wild mouflon sheep and domestic animals of Pakistan, and it will be useful in developing control strategies for emerging theileriosis in captive wild animals.
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Affiliation(s)
- M Naveed
- M.Phil. in Veterinary Medicine, Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - M Ijaz
- Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - A Ahmed
- Ph.D. Student in Veterinary Medicine, Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - N Z Ghumman
- M.Phil. in Veterinary Medicine, Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - M Ishaq
- M.Phil. in Veterinary Medicine, Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - I Muzammil
- Ph.D. Student in Veterinary Medicine, Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - M U Javed
- Ph.D. Student in Veterinary Medicine, Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore, Pakistan
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Zhao Y, Lawrence KE, Minor M, Gedye K, Wang B, Pomroy W, Potter M. CHANGES IN THE LEVELS OF THEILERIA ORIENTALIS IKEDA TYPE INFECTION IN HAEMAPHYSALIS LONGICORNIS NYMPHS OVER A SIX-MONTH PERIOD. J Parasitol 2021; 107:710-716. [PMID: 34525205 DOI: 10.1645/20-177] [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] [Indexed: 11/10/2022] Open
Abstract
This study aimed to investigate whether the infection intensity of Theileria orientalis Ikeda type organisms within Haemaphysalis longicornis larvae and nymph stages fluctuated over 6 mo after feeding as larvae on infected calves in the field. Naïve larvae, hatched from eggs, were fed on infected calves for 5 days while contained within cotton socks glued over the calves' ears. Larvae were first sampled immediately post-feeding and then sampled every 3 wk for 23 wk in total, after molting to nymphs. All larvae and nymphs were tested for T. orientalis Ikeda organisms using quantitative PCR. The qPCR results showed that the infection intensity of Haemaphysalis longicornis larvae and nymphs was not constant over the sampling period, and after initially dropping after molting to nymphs, it then rose with fasting to a maximum at 17 and 23 wk post-feeding. The significant rise in T. orientalis Ikeda organisms observed at 23 wk postfeeding may explain why more severe clinical cases of bovine theileriosis in New Zealand are seen in the spring when nymphs are the predominant instar questing.
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Affiliation(s)
- Yilin Zhao
- School of Agriculture and Environment, Massey University, Palmerston North, 4442, New Zealand
| | - Kevin E Lawrence
- School of Veterinary Science, Massey University, Palmerston North, 4442, New Zealand
| | - Maria Minor
- School of Agriculture and Environment, Massey University, Palmerston North, 4442, New Zealand
| | - Kristene Gedye
- School of Veterinary Science, Massey University, Palmerston North, 4442, New Zealand
| | - Bo Wang
- College of Animal Science and Technology, China Agricultural University, Beijing, 100083, China
| | - William Pomroy
- School of Veterinary Science, Massey University, Palmerston North, 4442, New Zealand
| | - Murray Potter
- School of Agriculture and Environment, Massey University, Palmerston North, 4442, New Zealand
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Santos AC, Nogueira CEW, Dos Santos Suñe Moraes B, Müller V, Mousquer MA, Leite FPL. Immune response of adult horses, pregnant mares and foals to an experimental vaccine with recombinant EMA-2 protein of Theileria equi. Res Vet Sci 2021; 139:186-192. [PMID: 34343932 DOI: 10.1016/j.rvsc.2021.07.013] [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: 03/24/2021] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 10/20/2022]
Abstract
Equine theileriosis, caused by the Theileria equi protozoan, is a disease of worldwide importance. T. equi expresses surface proteins, of which the EMA-2 protein is a promising antigen for vaccine use. The aim of this study was to evaluate the immune response of adult horses, pregnant mares, and foals to an experimental EMA-2 protein of recombinant T. equi vaccine. A total of 46 horses were used in this study for vaccine trials and challenges. Twelve geldings, 14 pregnant mares, and 14 foals were divided into vaccinated and control groups. Total serum specific anti-rEMA-2 IgG, IgG subclasses, and transcription of cytokines related to the immune response were evaluated. For the vaccine challenge, six six-month-old foals were divided into vaccinated and control groups. For the challenge, blood from a horse with theileriosis was transfused to the foals. Geldings and pregnant mares maintained anti-rEMA-2 IgG levels at 130 and 140 days after vaccination, respectively. The most-detected IgG subclasses in vaccinated were IgG3/5, IgG4/7, and IgG1. IL2, IL10, IL12, IL17, IFN-γ, and TNF-α were the most-transcribed cytokines in PBMCs of vaccinated horses stimulated with rEMA-2. Challenge with T. equi demonstrated that vaccinated foals had an increase of 33% in total IgG four days after blood transfusion, while control foals had no significant response, suggesting that vaccine antibodies may have recognized EMA-2 protein of the native T. equi antigen. T. equi recombinant EMA-2 was shown to be a promising vaccine antigen by inducing humoral and cellular immunity similar to that observed in natural parasite infections.
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Affiliation(s)
- Alice Corrêa Santos
- Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, Rio Grande do Sul, Brazil
| | - Carlos Eduardo Wayne Nogueira
- Departamento de Clínicas Veterinária, Faculdade de Medicina Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Bruna Dos Santos Suñe Moraes
- Departamento de Clínicas Veterinária, Faculdade de Medicina Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Vitória Müller
- Centro de Desenvolvimento Tecnológico, Biotecnologia, Pelotas, Rio Grande do Sul, Brazil
| | - Mariana Andrade Mousquer
- Departamento de Clínicas Veterinária, Faculdade de Medicina Veterinária, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
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Al-Hamidhi S, Elshafie EI, Yaghfoori S, Morrison WI, Johnson EH, Babiker HA. A comparative study of single Theileria lestoquardi and mixed infections with Theileria ovis. Parasit Vectors 2021; 14:370. [PMID: 34284816 PMCID: PMC8290529 DOI: 10.1186/s13071-021-04864-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 06/26/2021] [Indexed: 11/30/2022] Open
Abstract
Background Epidemiological surveys in Oman have revealed a high prevalence of the co-occurrence of the pathogenic Theileria lestoquardi and the non-pathogenic Theileria ovis among sheep in the Barka region, Oman. Our most recent data illustrated an interaction and reduced mortality risk in animals co-infected with T. lestoquardi and T. ovis, suggesting that the latter confers protection against pathogenicity of T. lestoquardi. The present study extends the above findings and examines disease outcomes; clinical markers, hematological parameters, and parasite density in mixed and single T. lestoquardi infections. Methods A total of 390 blood samples were collected from 16 sheep pens located in Barka, Oman between July and November 2019. Theileria spp. were detected and quantified using qPCR assay targeting 18S rRNA, and the extent of genetic diversity was estimated by a panel of T. lestoquardi specific micro- and mini-satellites. The association of some disease markers with the presence of Theileria spp. and genetic diversity was tested. Results Theileria spp. were detected in 75 (19.2%) sheep; of these 65 (86.7%) had mixed infections (T. lestoquardi plus T. ovis), 8 (10.6%) were infected with T. lestoquardi alone, and 2 (2.7%) with only T. ovis. Exotic breeds had a higher risk for Theileria spp. infection. The density (18S rRNA gene copies) of both parasites was higher in single infection against mixed infection, and there was a relatively lower density of T. lestoquardi in mixed infections. However, there was no difference in hematological indices between single T. lestoquardi and mixed infections. High genetic diversity was observed among T. lestoquardi in Barka, with no differences of T. lestoquardi in single and mixed infections. The extent of diversity seen in Barka was higher (He = 0.772) than that reported in Oman in 2019 (He = 0.582), with distinct T. lestoquardi genotypes. Conclusion The lower density of T. lestoquardi as mixed infection with T. ovis compared to single infection supports the hypothesis that T. ovis confers protection against lethal T. lestoquardi infection. However, there were no differences in disease correlations (clinical markers, hematological parameters, and density of parasites) or the extent of diversity of T. lestoquardi between the two types of infection. The presence of distinct T. lestoquardi genotypes in Barka, compared to that reported earlier in Oman, likely reflects movement of carrier animals and highlights the need for further analysis of the parasite populations to inform novel approaches for controlling malignant ovine theileriosis. Graphical Abstract ![]()
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Affiliation(s)
- Salama Al-Hamidhi
- Department of Biochemistry, College of Medicine and Health Sciences, Sultan Qaboos University, AlKhoud 123, PO Box 35, Muscat, Oman
| | - Elshafie I Elshafie
- Department of Animal and Veterinary Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Muscat, Oman.,Central Veterinary Research Laboratories, Al Amarat, P.O. Box 8067, Khartoum, Sudan
| | | | - W Ivan Morrison
- Division of Infection and Immunity, The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Eugene H Johnson
- Department of Animal and Veterinary Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Muscat, Oman
| | - Hamza A Babiker
- Department of Biochemistry, College of Medicine and Health Sciences, Sultan Qaboos University, AlKhoud 123, PO Box 35, Muscat, Oman. .,Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Edinburgh, UK.
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Gurboga M, Kugu G, Kamberaj H, Mutlu O. Identification of benzamide inhibitors of histone deacetylase 1 from Babesia and Theileria species via high-throughput virtual screening and molecular dynamics simulations. Parasitol Res 2021; 120:2175-87. [PMID: 33987736 DOI: 10.1007/s00436-021-07158-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 04/06/2021] [Indexed: 10/21/2022]
Abstract
Theileria and Babesia species are eukaryotic protozoan parasites classified under the order Piroplasmida of the phylum Apicomplexa. Tick vectors transmit these microorganisms in tropical and subtropical regions to a wide range of animals, including ruminants, causing fatal and life-threatening diseases such as bovine babesiosis and theileriosis. Resistance to commercially available drugs requires the search for new drug candidates. Histone deacetylase (HDAC) has a potential to be utilized as a drug target; therefore, it may be considered as an effective alternative. Previous studies revealed that HDAC inhibitors, identified for human use, show promising anti-parasitic effects. We have herein focused on the class I HDAC enzyme, HDAC1, of the Babesia and Theileria species to discover potential benzamide inhibitors by following a streamlined workflow of computer-aided drug design methodology. Molecular docking and molecular dynamics simulations revealed that benzamide derivatives stably interacted with the HDAC1 active site in both parasites as hypothesized. Furthermore, specific residue insertions at the entry point of the active site cleft of parasitic HDAC1 could enable ways to design parasite-specific drugs without adversely affecting host enzymes.
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Sariyer E, Kocer S, Danis O, Turgut-Balik D. In vitro inhibition studies of coumarin derivatives on Bos taurus enolase and elucidating their interaction by molecular docking, molecular dynamics simulations and MMGB(PB)SA binding energy calculation. Bioorg Chem 2021; 110:104796. [PMID: 33799179 DOI: 10.1016/j.bioorg.2021.104796] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 02/24/2021] [Accepted: 03/02/2021] [Indexed: 11/19/2022]
Abstract
Tropical theileriosis is among the most common vector-borne diseases and caused by Theileria parasites. Theileria annulata is an obligate intracellular protozoan parasite and transmitted to especially Bos taurus and Bos indicus by Hyalomma tick vectors. C8 ([4-(3,4-dimethoxyphenyl)-6,7-dihydroxy-2H-chromen-2-one); C9 (4-(3,4-dihydroxyphenyl)-7,8 dihydroxy-2H-chromen-2-one); C21 (4-(3,4-dihydroxyphenyl)-6,7-dihydroxy-2H-chromen-2 one) were identified as potent Theileria annulata enolase (TaEno) inhibitors in our previous studies. An ideal drug compound must inhibit the target parasite enzyme without inhibiting its homolog in the host. In this study, the inhibitory effect of the compounds previously evaluated on TaEno were tested on the host Bos taurus enolase (BtEno3) by in vitro studies. The interactions of enzyme-coumarin and enzyme-coumarin-substrate by in silico studies were also performed. All of the coumarin derivatives tested showed very low inhibitory effects on B. taurus enolase; 36,87% inhibition at 100 μM concentration for C8, 8,13% inhibition at 100 μM concentration for C9 and 77,69 μM of IC50 value for C21. In addition, these three coumarin derivatives and substrate 2PG were docked into the BtEno3 using molecular docking methods. Molecular interactions between enolase-coumarin and enolase-coumarin-substrate complexes were analyzed using molecular dynamics simulation methods for 100 ns. Estimated free energy of bindings of the substrate 2PG and coumarin derivatives to the BtEno3 were calculated by MM-GB(PB)SA methods. In comparison to the inhibition studies performed on TaEno, C8 and C9 coumarin derivatives remain the possible inhibitor candidates as they inhibit the host enolase at very high concentrations. These two promising compounds will be further analyzed by in vitro and in vivo studies towards developing an alternative drug against tropical theileriosis.
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Affiliation(s)
- Emrah Sariyer
- Yıldız Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Davutpasa campus, 34210, Istanbul, Turkey; Artvin Coruh University, Vocational School of Health Services, Medical Laboratory Techniques, 08000, Artvin, Turkey
| | - Sinem Kocer
- İstanbul Yeni Yüzyıl University, Faculty of Pharmacy, Department of Pharmaceutical Biotechnology, 34010, Istanbul, Turkey
| | - Ozkan Danis
- Marmara University, Faculty of Arts and Sciences, Department of Chemistry, 34722, Istanbul, Turkey
| | - Dilek Turgut-Balik
- Yıldız Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Davutpasa campus, 34210, Istanbul, Turkey.
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Foughali AA, Amairia S, Bitam I, Berber A, Gharbi M. Knowledge, attitude and perception of bovine piroplasmosis by cattle owners in Constantine, North-East of Algeria, using participatory epidemiology. Trop Anim Health Prod 2021; 53:167. [PMID: 33594496 DOI: 10.1007/s11250-021-02608-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 02/08/2021] [Indexed: 10/22/2022]
Abstract
Cattle piroplasmoses are tick-borne diseases, spread worldwide that cause significant economic losses. A participatory epidemiological study was conducted individually or in focus groups with 73 cattle owners in Beni Hamidene locality (district of Constantine, Algeria). The aim of this study was to study cattle owners' knowledge, attitude and perception on cattle piroplasmosis. Proportional piling technique was used to determinate most common cattle diseases, and to evaluate economic impact of diseases according to the interwieved farmers. Theileriosis (49/73; 67.1%) and babesiosis (44/73; 60.3%) were considered the most important bovine diseases. No zoonotic disease was cited by the interviewed cattle owners. According to the majority of cattle owners, theileriosis and babesiosis are deadly diseases (87.3 and 78.1%, respectively). All cattle owners (73/73) cited fever as the most common symptom of tropical theileriosis. Some of them (14/73; 19.2%) do not make distinction between theileriosis and babesiosis. According to cattle owners (65/73; 89.0%), the use of acaricide is the most appropriate tick control method. This study provides information about knowledge on bovine piroplasmoses in Algeria. These information could be considered when performing control programmes by both animal decision-makers and field veterinarians.
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Clift SJ, Steyl JCA, Mitchell EP, Lawrence JA, Hooijberg EH. Clinical and hematologic features of experimental theileriosis in roan calves (Hippotragus equinus). Ticks Tick Borne Dis 2020; 12:101644. [PMID: 33450579 DOI: 10.1016/j.ttbdis.2020.101644] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 04/21/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 12/26/2022]
Abstract
Theileria sp. (sable) infection commonly causes significant calf mortality in endangered roan antelopes (Hippotragus equinus). Schizont-induced leukocyte transformation and systemic immune dysregulation with associated cytopenias characterizes theileriosis in livestock. Data on related hematologic alterations are scarce in roan antelopes. The objective of this study was to investigate temporal changes in selected clinical parameters and hematologic measurands in experimentally infected (EI) roan calves. Six of eight calves developed theileriosis after inoculation with a Theileria sp. (sable)-infected tick stabilate. Consecutive measures of rectal temperature, lymph node size, white blood cell count (WBC), packed cell volume (PCV), hemoglobin concentration, differential leukocyte counts, leukocyte and erythrocyte morphology and percentage parasitemia were recorded. Data were compared with 15 age-matched PCR-negative control calves and nine older immune animals that had recovered from natural infection. Two non-pyrexic EI calves recovered uneventfully. Six pyrexic calves were treated, four of which died. Time to pyrexia and/or observation of schizonts and piroplasms was approximately two weeks. Total WBCs were unchanged post-infection (PI); neutrophils and typical monocytes decreased whereas typical lymphocytes (Ls) and atypical mononuclear leukocytes (AMLs), which were grouped together, increased. Parasitized and non-parasitized lymphocyte and AML (L/AML) size increased significantly PI. Piroplasms occurred intermittently at low frequencies («1 % of erythrocytes) after infection. Fatally infected calves were dehydrated, anemic, and icteric with hemorrhages and multi-organ infiltration by AMLs. The PCV and hemoglobin concentration increased PI, and platelet clumps were consistently observed. Experimental acute theileriosis in roan antelopes follows a similar pattern of disease progression to that in domestic livestock. Parasitized and non-parasitized AMLs are pivotal to the pathogenesis and require phenotypic characterization if we are to further our understanding of disease progression and severity in roan antelopes.
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Affiliation(s)
- Sarah J Clift
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa.
| | - Johan C A Steyl
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa.
| | - Emily P Mitchell
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa.
| | - John A Lawrence
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa.
| | - Emma H Hooijberg
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, South Africa.
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Hao L, Yuan D, Li S, Jia T, Guo L, Hou W, Lu Z, Mo X, Yin J, Yang A, Zheng W, Li R. Detection of Theileria spp. in ticks, sheep keds (Melophagus ovinus), and livestock in the eastern Tibetan Plateau, China. Parasitol Res 2020; 119:2641-8. [PMID: 32556503 DOI: 10.1007/s00436-020-06757-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 06/04/2020] [Indexed: 02/07/2023]
Abstract
Theileria species, with a broad geographic distribution, infect a wide range of both domestic and wild animals and are transmitted by ixodid ticks. Currently, there is no comprehensive report regarding the distribution of Theileria spp. in the eastern Tibetan Plateau, especially in Ganze Tibetan autonomous prefecture (153,700 km2) and Ngawa Tibetan and Qiang autonomous prefecture (84,242 km2) of Sichuan province, China. In this study, we collected blood samples from yaks (n = 144) (Bos grunniens), Tibetan sheep (n = 92), and Tibet horses (n = 142) in Ganze and Ngawa.Theileria sinensis, T. luwenshuni, and T. equi were the dominant Theileria species detected in yaks, Tibetan sheep, and horses with the total infection rates of 25.7% (37/144), 75.0% (69/92), and 51.4% (73/142), respectively. For ectoparasites, T. luwenshuni was the only Theileria species detected in sheep keds (Melophagus ovinus) with an infection rate of 30.8% (8/26). The total infection rates of T. sinensis in Haemaphysalis qinghaiensis, Dermacentor everestianus, and Rhipicephalus microplus were 34.6% (36/104), 34.0% (17/50), and 51.3% (58/113), respectively. Theileria spp., belonging to T. sergenti/buffeli/orientalis group, were only detected in R. microplus collected in Danba county of Ganze with a total infection rate of 39.9% (19/48). Our results provide important data of the epidemiology of Theileria spp. in livestock and ectoparasites and will assist with the implementation of measures to control theileriosis transmission in eastern Tibetan Plateau, China.
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Lawrence KE, Hickson RE, Wang B, Gedye K, Fraser K, Pomroy WE. The efficacy of toltrazuril treatment for reducing the infection intensity of Theileria orientalis Ikeda type in dairy calves. Vet Parasitol 2020; 282:109124. [PMID: 32442844 DOI: 10.1016/j.vetpar.2020.109124] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/22/2020] [Accepted: 04/22/2020] [Indexed: 11/28/2022]
Abstract
The aim of this study was to test the hypothesis that toltrazuril administered at 4 weeks post-turnout reduces the infection intensity of Theileria orientalis Ikeda type in dairy calves and so prevents serious clinical disease in these animals at 2-3 months of age. Two groups of 40 dairy calves on two separate dairy farms in the Waikato were followed for 16 weeks post-turnout onto pasture. On each farm, 20 calves were randomly selected and orally treated with toltrazuril (15 mg/kg) at 4 weeks post-turnout, whilst the remaining 20 calves were left untreated. All 40 calves were blood sampled and weighed at 2, 4, 6, 8, 12, and 16 weeks post-turnout i.e. 6 samplings per calf. A random subset of 10 calves from each treatment group on each farm were faecal sampled at each visit. The blood samples were used to estimate the T. orientalis Ikeda type infection intensity and haematocrit for each calf and the faecal samples were used to estimate the number of coccidia oocysts per gram of faeces. Three linear mixed effects models, to evaluate the effect of toltrazuril treatment on infection intensity, haematocrit (HCT) and weight respectively were fitted to the data. No calves on either farm developed clinical theileriosis or coccidiosis and the three mixed effects linear models, controlling for the effect of farm and days from turnout, showed that there was no effect of treatment on infection intensity (p = 0.81), on HCT (p = 0.99) and on weight gain (p = 0.79). In conclusion, this study showed no evidence supporting the use of toltrazuril to control T. orientalis Ikeda type infection levels and prevent disease.
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Affiliation(s)
- K E Lawrence
- School of Veterinary Science, Massey University, Palmerston North, New Zealand.
| | - R E Hickson
- School of of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
| | - B Wang
- College of Animal Science and Technology, China Agricultural University, Beijing, China.
| | - K Gedye
- School of Veterinary Science, Massey University, Palmerston North, New Zealand.
| | - K Fraser
- School of of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
| | - W E Pomroy
- School of Veterinary Science, Massey University, Palmerston North, New Zealand.
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Narang A, Singh Randhawa S, Kumar Sood N, Chhabra S, Singla LD, Kaur P. Atypical theileriosis with cutaneous involvement in a cow in India: a case report. REV SCI TECH OIE 2020; 38:703-709. [PMID: 32286574 DOI: 10.20506/rst.38.3.3019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Bovine tropical theileriosis caused by Theileria annulata is an overwhelming haemoprotozoan tick-borne disease in taurine and cross-bred cattle in Punjab, India. However, there seems to be no report from India of cutaneous nodules associated with the disease. This report describes a five-year-old cross-bred cow presented to a university clinic with a history of fever, inappetence and malaise for the past six to seven days. Clinical examination revealed normal vital parameters, pale mucous membranes, mild enlargement of the prescapular lymph nodes and multiple subcutaneous nodular masses (2-4 cm) on the neck and abdomen. Haematology revealed mild anaemia and leucopenia with 48% neutrophils, 48% lymphocytes and 4% eosinophils. Romanowsky-stained smears of fineneedle aspiration biopsy samples from swollen lymph nodes and subcutaneous masses showed an increased number of lymphoid cells, suggesting cutaneous lymphomatosis. However, a critical examination of the smears from subcutaneous nodules showed a large number of Koch's blue bodies in macrophages and lymphoblasts, and several piroplasms were also noticed within the red blood cells in lymph node smears. A peripheral blood smear revealed mild to moderate parasitaemia. Extracted DNA from the parasitologically positive blood sample was subjected to nested polymerase chain reaction (nPCR) using T. annulata speciesspecific primers encoding the 30-kiloDalton major sporozoite surface antigen. The desired 572-base pair amplified product of the nPCR was comparable to the positive control. This seems to be a rare case of T. annulata in an adult cross-bred cow, showing cutaneous nodular involvement.
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Marendy D, Baker K, Emery D, Rolls P, Stutchbury R. Haemaphysalis longicornis: the life-cycle on dogs and cattle, with confirmation of its vector status for Theileria orientalis in Australia. Vet Parasitol 2019; 277S:100022. [PMID: 32904744 PMCID: PMC7458380 DOI: 10.1016/j.vpoa.2019.100022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/20/2019] [Accepted: 12/20/2019] [Indexed: 12/01/2022]
Abstract
Conditions for the optimal generation interval for the “bush tick”, Haemaphysalis longicornis, in Australia have been determined. Stabilates containing infective sporozoites of Theileria orientalis ikeda were produced from ground-up ticks (GUTS) and salivary glands of H.longicornis. Sporozoites of Theileria orientalis required around 3–5 days of tick feeding to mature in salivary glands before transmission occurred (like T.parva). GUTS and salivary gland stabilates produced detectable infections with T.orientalis in naive calves around 3–4 weeks after inoculation. This study confirms the final host status of H.longicornis for T.orientalis in Australia, facilitating research for prophylaxis and vector control.
The intracellular protozoal parasite Theileria orientalis ikeda has rapidly spread across South-eastern Australia since 2006, causing deaths and production losses in cattle. The 3-host “bush tick” Haemaphysalis longicornis (Neumann) appears the principal biological vector in the endemic regions. To generate sufficient numbers of ticks to produce stabilate for infection to confirm vector competency and for acaricide trials, the optimal conditions and stage-specific intervals for the generational life-cycle of H.longicornis was defined on two dogs and two steers. To determine whether H.longicornis was a definitive host for Theileria orientalis, nymphal stages were fed on a steer infected with T.orientalis and moulted adults were permitted to feed for 3 days on an uninfected calf prior to harvest. Subsequent detection of infection after inoculation of four naïve calves with stabilate produced from ground-up adult ticks or dissected salivary glands confirmed H.longicornis as one final (definitive) host for T.orientalis in Australia.
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Affiliation(s)
- Dominique Marendy
- Elanco Animal Health, Yarrandoo Research and Development Centre, New South Wales 2178, Australia
| | - Kim Baker
- Elanco Animal Health, Yarrandoo Research and Development Centre, New South Wales 2178, Australia
| | - David Emery
- Sydney School of Veterinary Science, University of Sydney, New South Wales 2006, Australia.
| | - Peter Rolls
- Queensland Department of Agriculture and Fisheries, Tick Fever Centre, Wacol, Queensland 4076, Australia
| | - Ralph Stutchbury
- Queensland Department of Agriculture and Fisheries, Biosecurity Sciences Laboratory, Coopers Plains, Queensland 4108, Australia
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Salim B, Chatanga E, Jannot G, Mossaad E, Nakao R, Weitzman JB. Mutations in the TaPIN1 peptidyl prolyl isomerase gene in Theileria annulata parasites isolated in Sudan. Int J Parasitol Drugs Drug Resist 2019; 11:101-105. [PMID: 31794951 PMCID: PMC6904843 DOI: 10.1016/j.ijpddr.2019.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/26/2019] [Accepted: 11/14/2019] [Indexed: 11/27/2022]
Abstract
The tick-borne parasite Theileria annulata is the causative agent of tropical theileriosis or Mediterranean theileriosis. Infection of bovine leukocytes by the obligate intracellular parasites induces proliferative and invasive phenotypes associated with activated signaling pathways. The transformed phenotypes of infected cells are reversible by treatment with the theilericidal drug buparvaquone. Recent reports of resistance to buparvaquone in Africa and Asia highlight the need to investigate the mechanisms and prevalence of drug resistance. We screened 67 T. annulata isolates from Sudan to investigate mutations in the T. annulata prolyl isomerase I gene (TaPIN1). The secreted TaPin1 interacts with host proteins to induce pathways driving oncogenic transformation and metabolic reprogramming. We found an Alanine-to-Proline mutation at position 53 (A53P) in the catalytic loop that was previously found in Tunisian drug-resistant samples. This is the first study reporting independent confirmation of the A53P mutation in geographically isolated samples. We found several additional mutations in the predicted N-terminal signal peptide that might affect TaPin1 processing or targeting. We found that many parasites also share mutations in both the TaPIN1 and the cytochrome b genes, suggesting that these two genes represent important biomarkers to follow the spread of resistance in Africa, the Middle East and Asia.
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Affiliation(s)
- Bashir Salim
- Department of Parasitology, Faculty of Veterinary Medicine, University of Khartoum, P.O. Box 32, Khartoum North, Sudan.
| | - Elisha Chatanga
- Laboratory of Parasitology, Graduate School of Infectious Diseases, Faculty of Veterinary Medicine, Hokkaido University, N18 W9, Sapporo, Hokkaido, 060-0818, Japan
| | - Guillaume Jannot
- Université de Paris, Epigenetics and Cell Fate, CNRS, F-75013, Paris, France
| | - Ehab Mossaad
- Department of Pathology, Parasitology and Microbiology, College of Veterinary Medicine, Sudan University of Science and Technology, P.O. Box 204, Khartoum, Sudan
| | - Ryo Nakao
- Laboratory of Parasitology, Graduate School of Infectious Diseases, Faculty of Veterinary Medicine, Hokkaido University, N18 W9, Sapporo, Hokkaido, 060-0818, Japan
| | - Jonathan B Weitzman
- Université de Paris, Epigenetics and Cell Fate, CNRS, F-75013, Paris, France.
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Yakarsonmez S, Danis O, Mutlu O, Topuzogullari M, Sariyer E, Yuce-Dursun B, Turgut-Balik D. Discovery and evaluation of inhibitory activity and mechanism of arylcoumarin derivatives on Theileria annulata enolase by in vitro and molecular docking studies. Mol Divers 2020; 24:1149-64. [PMID: 31754915 DOI: 10.1007/s11030-019-10018-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 11/15/2019] [Indexed: 10/25/2022]
Abstract
In this study, the inhibition potential of 3- and 4-arylcoumarin derivatives on Theileria annulata enolase (TaENO) was assessed for the first time in the literature. Firstly, protein stabilization analyses of TaENO were performed and it was found that the enzyme remains stable with the addition of 6 M ethylene glycol at + 4 °C. Inhibitor screening analyses were carried out using 25 coumarin derivatives on highly purified TaENO (> 95%), and four coumarin derivatives [4-(3,4-dimethoxyphenyl)-6,7-dihydroxy-2H-chromen-2-one (C8); 4-(3,4-dihydroxyphenyl)-7,8 dihydroxy-2H-chromen-2-one (C9); 4-(3,4-dihydroxyphenyl)-6,7-dihydroxy-2H-chromen-2 one (C21); and 3-(3,4-dihydroxyphenyl)-7,8-dihydroxy-2H-chromen-2-one (C23)] showed the highest inhibitory effects with the IC50 values of 10.450, 13.170, 8.871 and 10.863 µM, respectively. The kinetic results indicated that these compounds inhibited the enzyme by uncompetitive inhibition. In addition, the successful binding of the most potent inhibitor (C21) into TaENO was confirmed by using MALDI-TOF mass spectrophotometry. Molecular docking analyses have predicted that C8 and C21 coumarin derivatives which showed high inhibitory effects on TaENO were interacted with high affinity to the potential regions out of the active site. Taken together, these coumarin derivatives (C8, C9, C21 and C23) are first known potent, nonsubstrate, uncompetitive inhibitors of TaENO and these results will facilitate further in vitro and in vivo analysis toward structure-based drug design studies.
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Lawrence KE, Gedye K, Pomroy WE. A longitudinal study of the effect of Theileria orientalis Ikeda type infection on three New Zealand dairy farms naturally infected at pasture. Vet Parasitol 2019; 276:108977. [PMID: 31775104 DOI: 10.1016/j.vetpar.2019.108977] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/07/2019] [Accepted: 11/11/2019] [Indexed: 11/22/2022]
Abstract
The aims of this study were to monitor the change in Theileria orientalis Ikeda type infection intensity, haematocrit, milk production and reproduction on three New Zealand spring calving dairy herds, over the 2014-2015 milking season. Three spring calving dairy farms, A, B and C, from high risk (endemically stable), low risk (endemically unstable), and zero risk (disease-free) tick areas respectively were followed through the 2014-2015 milking season. On Farms, A and B, 100 cows were randomly selected at the first visit, and the same cows blood sampled every month thereafter, whilst on Farm C, the whole herd was blood sampled bimonthly (140 cows). Blood samples were tested for haematocrit, by centrifugation, and Ikeda infection intensity, using qPCR. Animals that were Ikeda type PCR positive at the first sampling were described as prevalence cases and cows that were negative at the first sampling and became PCR positive during the sampling period were described as incidence cases. Production and reproduction data were accessed through LIC MINDA® and milk production data was standardised to energy corrected milk (ECM). In addition, the effect of buparvaquone (BPQ) treatment on milk production was estimated on Farm B. The prevalence of infection at the first sampling was 100 % on Farm A, 57 % on Farm B and 26 % on Farm C. The incidence risk of infection over the sampling period on Farms B and C was 25 % and 2 % and the incident rate was 0.026 and 0.002 cases per cow-month respectively. The average infection intensity for prevalence cases on all farms was low throughout the milking season, <7000 Ikeda organisms/μL however, cases of anaemia still occurred. There was no direct effect of infection intensity on milk production or from being a prevalence case compared to an uninfected cow on milk production, across all farms. However, on Farm B there was a loss of 266 kg (95 % CI 82 ̶ 450) ECM (∼20 kg milk solids) for incidence cases and a loss of 458 kg (95 % CI 211 ̶ 710) of ECM for buparvaquone treated cows, compared to uninfected cows. No significant effect of Ikeda infection on reproduction could be shown for Farms B and C, reproductive data for Farm A was not available. The effect of T. orientalis Ikeda type infection on production and reproduction appears to be minimal once animals have passed through the acute phase of infection and reached the chronic, asymptomatic carrier phase of infection.
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Abdelwahab GE, Tigani-Asil E, Yusof MF, Abdullah ZS, Rifat JF, Hosani MAA, Almuhairi SS, Khalafalla AI. Salmonella enterica and Theileria co-infection in dromedary camels ( Camelus dromedarius) in UAE. Open Vet J 2019; 9:263-268. [PMID: 31998621 PMCID: PMC6794394 DOI: 10.4314/ovj.v9i3.12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 08/08/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Despite a steady increase in camel husbandry worldwide, pathology of camel diseases is still relatively under-investigated. Clinical hematuria is generally indicative of either acute or chronic urogenital inflammations, traumatic calculous injuries, cancers, corrosive poisonings. Infectious agents are not typically implicated in urinary tract infection of camels. AIM This study aims to explore possible causes in camels clinically suffered from acute febrile disease with severe hematuria. METHODS To achieve aims of the study culturing of urine samples, microscopic examination for detection of blood parasites, phenotypic and genotypic characterization for the identification of isolated bacteria were followed. RESULTS Conventional bacteriology enabled identification of Salmonella enterica subsp. enterica serovar typhimurium which further genotyped by 16S rRNA gene sequencing. Microscopic examination of Giemsa stained blood smears from both infected dromedary camels revealed the presence of pleomorphic Theileria piroplasms. The results suggest that the clinical symptoms were as coinfection induced by salmonellosis and theileriosis. CONCLUSION Given these remarkable findings, further research should aim to better characterize the opportunistic pathogens associated with camel theileriosis, as well as to determine other possible infectious agents of the camel urinary tract.
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Affiliation(s)
- Ghada Elderdiri Abdelwahab
- Veterinary Laboratories Division, Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
| | - El Tigani-Asil
- Veterinary Laboratories Division, Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
| | - Mohammed Farouk Yusof
- Veterinary Laboratories Division, Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
| | - Zayed Saud Abdullah
- Veterinary Laboratories Division, Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
| | - Jamal Fattah Rifat
- Animal Health Division, Animal health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
| | - Mohamed A. Al Hosani
- Veterinary Laboratories Division, Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
| | - Salama Suhail Almuhairi
- Veterinary Laboratories Division, Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
| | - Abdelmalik Ibrahim Khalafalla
- Veterinary Laboratories Division, Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE
- Corresponding Author: Abdelmalik Ibrahim Khalafalla. Animal Health Sector, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA), Abu Dhabi, UAE.
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Vianna AM, Santos AC, Cunha RC, de Souza Stori de Lara AP, Weege GB, Leivas Leite FP. Antigenicity assessment of the Theileria equi merozoite antigen (EMA-2) expressed in Pichia pastoris in mice and horses. Exp Parasitol 2019; 206:107757. [PMID: 31494216 DOI: 10.1016/j.exppara.2019.107757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 03/13/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 11/18/2022]
Abstract
Equine theileriosis is a severe equine disease caused by the protozoan Theileria equi, which is prevalent in tropical and subtropical areas. In this study, a recombinant equi merozoite antigen-2 (rEMA-2) of T. equi was used as an immunogen. Two groups of 10 mice each were divided into control and vaccinated groups. Sixty mares seronegative for theileriosis were divided in two groups, one vaccinated and another group as a control animal. Mice and mares of the vaccinated groups were inoculated with 150 μL of the vaccine containing 50 μg of rEMA-2 and 2 mL of the vaccine containing 200 μg of rEMA-2, respectively, at days 0 and 21. The immunogenicity of rEMA-2 was evaluated by ELISA and fluorescent antibody test (IFAT) using serum from vaccinated mice, mares and antigenicity in naturally infected horse. At every point throughout the ELISA study, there were significant differences between the vaccinated and control groups (p < 0.05). The vaccine induced 3- and 4-fold IgG increases in mice at the 14th and 28th day, respectively, compared to the control group. The horses' IgG dynamics showed a significant (p < 0.05) increase in the total IgG titer as early as day 7, which increased until day 28 at which time a more significant (p < 0.001) IgG titer was observed. In evaluating the isotypes, we observed a trend similar to that of total IgG, where IgG(T) (IgG3-5) were significantly (p < 0.05) more elevated than the other isotypes analyzed, followed by IgGb (IgG4-7) and IgGa (IgG1). Positive fluorescence was detected by IFAT, suggesting that the protein is immunogenic and conserves some epitopes identical to the native T. equi antigens present in the equine blood smear. Thus, our results suggest that rEMA-2 can be a promising vaccinal antigen.
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Affiliation(s)
- Ana Muñoz Vianna
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil.
| | - Alice Correa Santos
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil.
| | - Rodrigo Casquero Cunha
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil.
| | | | - Guilherme Borges Weege
- Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
| | - Fábio Pereira Leivas Leite
- Laboratório de Bacteriologia, Núcleo de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil; Departamento de Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
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Dos Santos TM, Roier ECR, Pires MS, Santos HA, Vilela JAR, Peckle M, Paulino PG, Baldani CD, Massard CL. Molecular evidence of Anaplasma phagocytophilum and Theileria equi coinfection in horses from Rio de Janeiro, Brazil. Vet Anim Sci 2019; 7:100055. [PMID: 32734076 PMCID: PMC7386651 DOI: 10.1016/j.vas.2019.100055] [Citation(s) in RCA: 5] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 03/17/2019] [Accepted: 03/19/2019] [Indexed: 11/25/2022] Open
Abstract
Molecular evidence of coinfection with A. phagocytophilum and T. equi in horses in Brazil was confirmed for the first time by the detection of DNA from both agents. EGA should be included in differential diagnosis of tick-borne diseases in horses. Different clinical manifestations in horses may be due to coinfection.
The present study aims to determine the frequencies of Theileria equi and Anaplasma phagocytophilum antibodies among horses from the state of Rio de Janeiro, Brazil, and to detect the presence of DNA of these pathogens through molecular methods. A total of 98 serum samples of horses from the municipality of Seropedica were tested by indirect immunofluorescence antibody (IFA) to detect anti-A. phagocytophilum and anti-T. equi IgG antibodies. In addition, quantitative real-time PCR (qPCR) was used to detect these pathogens in the DNA extracted from the whole blood and buffy coat of horses. Bivariate analysis and odds ratio were performed to verify the possible association between positivity and characteristics related to the horses. As evaluated by IFA and qPCR, the frequency of animals that tested positive for T. equi was 89.8% (n = 88/98) and 91.8% (n = 90/98), whereas A. phagocytophilum was 17.4% (n = 17/98) and 1.0% (n = 1/98), respectively. Serological evidence of exposure to A. phagocytophilum and T. equi was observed in 16.3% (n = 16/98) of the horses; however, exposure was confirmed by qPCR in only 1.0% (n = 1/98). No statistical association was found in the bivariate and odds ratio analysis. This is the first study reporting the molecular detection of A. phagocytophilum DNA in horses from the state of Rio de Janeiro, and also the coinfection of A. phagocytophilum and T. equi in a horse from Brazil confirmed by molecular methods. Equine granulocytic anaplasmosis is circulating in Brazilian horses, together with T. equi, and should be included in the differential diagnosis of tick-borne diseases.
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Affiliation(s)
- Tiago Marques Dos Santos
- Department of Epidemiology and Public Health, Veterinary Institute, Federal Rural University of Rio de Janeiro, Br 465, km 7, Seropedica, Rio de Janeiro 23897-000, Brazil
| | | | - Marcus Sandes Pires
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro, Br 465, km 7, Seropedica, Rio de Janeiro 23897-000, Brazil
| | - Huarrisson Azevedo Santos
- Department of Epidemiology and Public Health, Veterinary Institute, Federal Rural University of Rio de Janeiro, Br 465, km 7, Seropedica, Rio de Janeiro 23897-000, Brazil
| | - Joice Aparecida Rezende Vilela
- Company of Technical Assistance and Extension Rural (EMATER) Estrada RJ 99, km 8 - Piranema, Itaguaí, Rio de Janeiro 23855-120, Brazil
| | - Maristela Peckle
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro, Br 465, km 7, Seropedica, Rio de Janeiro 23897-000, Brazil
| | - Patrícia Gonzaga Paulino
- Department of Epidemiology and Public Health, Veterinary Institute, Federal Rural University of Rio de Janeiro, Br 465, km 7, Seropedica, Rio de Janeiro 23897-000, Brazil
| | - Cristiane Divan Baldani
- Department of Medicine and Veterinary Surgery, Federal Rural University of Rio de Janeiro, BR 465, Km 7, Seropédica, Rio de Janeiro 23890000, Brazil
| | - Carlos Luiz Massard
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro, Br 465, km 7, Seropedica, Rio de Janeiro 23897-000, Brazil
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Jayalakshmi K, Sasikala M, Veeraselvam M, Venkatesan M, Yogeshpriya S, Ramkumar PK, Selvaraj P, Vijayasarathi MK. Prevalence of haemoprotozoan diseases in cattle of Cauvery delta region of Tamil Nadu. J Parasit Dis 2019; 43:308-312. [PMID: 31263338 DOI: 10.1007/s12639-019-01094-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 10/21/2018] [Accepted: 02/04/2019] [Indexed: 10/27/2022] Open
Abstract
A study was carried out to determine the prevalence of haemoparasites in cattle in Cauvery delta region over a period of one year. A total of 228 giemsa stained blood smears were screened for the presence of haemoprotozoa, out of which 34 animals were found to be positive. An overall prevalence of haemoparasites in the sampled cattle were 14.9%, among this Anaplasma sp (8.3%), Babesia sp (3.95%), Theileria sp (2.19%) and Trypanosoma sp (0.44%) as single or mixed blood parasitic infections. In this study Anaplasmosis (14%) was highly prevalent during the winter season and Babesiosis (13.73%) was highly prevalent during summer months followed by Anaplasmosis (9.8%) and Theileriosis (7.8%), the lowest prevalence of Trypanosomiasis was observed during the rainy season. The seasonal variation in prevalence of haemoprotozoan disease might be due to influence of climatic factors on density of vector population in that geographical area. Haemogram revealed decreased level of haemoglobulin, packed cell volume and total erythrocyte count. The serum biochemistry revealed elevated level of liver enzyme Asparate transaminase enzyme. All haemoparasitaemic animals were treated with specific drugs and recovered successfully.
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Affiliation(s)
- K Jayalakshmi
- 1Department of Veterinary Medicine, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
| | - M Sasikala
- 2Department of Veterinary Pathology, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
| | - M Veeraselvam
- 1Department of Veterinary Medicine, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
| | - M Venkatesan
- 1Department of Veterinary Medicine, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
| | - S Yogeshpriya
- 1Department of Veterinary Medicine, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
| | - P K Ramkumar
- 3Veterinary Clinical Complex, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
| | - P Selvaraj
- 1Department of Veterinary Medicine, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
| | - M K Vijayasarathi
- 4Department of Veterinary Parasitology, Veterinary College and Research Institute, Orathanadu, 614 625 India.,5Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051 India
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Lawrence KE, McFadden AMJ, Bingham P, Pulford DJ, Vink WD, Pomroy WE. Prevalence studies for Theileria orientalis conducted during the early stages of the 2012 New Zealand epidemic of Theileria associated bovine anaemia. Vet Parasitol Reg Stud Reports 2018; 13:38-44. [PMID: 31014886 DOI: 10.1016/j.vprsr.2018.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 07/28/2017] [Revised: 01/18/2018] [Accepted: 03/31/2018] [Indexed: 11/30/2022]
Abstract
Since 1982 there have been two epidemics of bovine anaemia associated with Theileria orientalis infection (TABA) in New Zealand. The latest and more serious epidemic started in 2012 and is associated with the T. orientalis (Ikeda) type. In 2013 the Ministry for Primary Industries (MPI) carried out several epidemiological investigations on the TABA epidemic, which included a series of on-farm herd prevalence studies. The aims of this paper are to present and summarise the results of these herd prevalence studies. The data were collected from March 2013 to September 2013 and comprised 26 farms. For 21/26 of these farms, a T. orientalis (Ikeda) positive index case of TABA precipitated the follow-up herd prevalence study. Each herd prevalence study involved a random sample of 10 cows for haematocrit, for piroplasm counts (number of Theileria infected RBCs per 1000 RBCs) and for PCR molecular diagnosis. Animals were diagnosed anaemic if the haematocrit ≤0.24. The results showed that for the index cases, the average haematocrit = 0.10 L/L and the average piroplasm count = 10.9 Theileria infected RBCs per 1000 RBCs, and for the herd prevalence studies the average haematocrit = 0.26 and the average piroplasm count = 6.9. The average herd prevalence of T. orientalis (Ikeda) PCR positive cattle and of anaemic cattle was 87% and 26% respectively. For dairy herds (n = 7 herds) it took, on average, 80 days for the within herd prevalence of anaemia to return to zero after the initial diagnosis. In conclusion the prevalence studies showed that infection rates and anaemia rates were already high in herds when the index case of TABA was observed. At the time, these prevalence studies significantly added to our understanding of the epidemiology of the evolving T. orientalis (Ikeda) epidemic and furthermore met the New Zealand MPI objective of being rapid and applied, fit for purpose and completed at a relatively low cost.
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Affiliation(s)
- K E Lawrence
- School of Veterinary Science, Massey University, Palmerston North 4442, New Zealand.
| | - A M J McFadden
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - P Bingham
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - D J Pulford
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - W D Vink
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - W E Pomroy
- School of Veterinary Science, Massey University, Palmerston North 4442, New Zealand
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Lawrence KE, Sanson RL, McFadden AMJ, Pulford DJ, Pomroy WE. The effect of month, farm type and latitude on the level of anaemia associated with Theileria orientalis Ikeda type infection in New Zealand cattle naturally infected at pasture. Res Vet Sci 2017; 117:233-238. [PMID: 29310034 DOI: 10.1016/j.rvsc.2017.12.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 11/12/2017] [Accepted: 12/27/2017] [Indexed: 01/22/2023]
Abstract
Commencing in 2012, an epidemic of infectious bovine anaemia associated with Theileria orientalis Ikeda type has been present in New Zealand. The aims of this study were to analyse the temporal and spatial effects of T. orientalis Ikeda type infection on the sample submission rates and haematocrits of infected cattle over the first two years of the New Zealand epidemic. The data were collected from 30/08/2012 to 28/11/2014 and included all samples that met the case definition for Theileria associated bovine anaemia (TABA) and tested positive for T. orientalis Ikeda type by PCR. The sample submission rates by month and farm type were highly seasonal with dairy farm submissions peaking in September a month before beef farm submissions peaked. A second lesser peak of dairy farm submissions in April was absent for beef farms. A mixed effects model was fitted to the data and showed a significant interaction between farm production type (dairy or beef) and month of sampling (p=0.006) and between latitude and month of sampling (p=0.024). The estimated haematocrit, adjusted for month and latitude, for dairy cattle=0.125 (95%CI 0.121-0.129) and for beef cattle=0.151 (95% CI 0.138-0.165), p<0.0001. This research shows that infected beef animals tend to be less severely affected than dairy animals and that the month of sampling and latitude of the sampled farm have significant and interacting effects on the level of anaemia associated with T. orientalis Ikeda type infection.
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Affiliation(s)
- K E Lawrence
- Massey University, Palmerston North 4410, New Zealand.
| | - R L Sanson
- AsureQuality, Tennent Drive, PO Box 609, Palmerston North 4440, New Zealand
| | - A M J McFadden
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - D J Pulford
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - W E Pomroy
- Massey University, Palmerston North 4410, New Zealand
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Shruthi R, Thimmareddy PM, Mamatha GS, Chandranaik BM, Puttalakshmamma GC. Studies on theileriosis in goats from Karnataka, South India. J Parasit Dis 2017; 41:1082-1085. [PMID: 29114145 PMCID: PMC5660037 DOI: 10.1007/s12639-017-0937-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 06/30/2017] [Indexed: 10/19/2022] Open
Abstract
A study was conducted to determine the prevalence of theileriosis in goats from southern districts of Karnataka. Out of 47 goat blood samples examined by microscopy, 68.08% (32/47) were positive for Theileria spp. The parasitemia ranged from 1.0 to 1.8 and 0.1-0.9% in clinical and carrier animals respectively. Out of 325 ticks collected from goats, 92.6 (301) and 7.38 (24)% of the ticks were found to be Haemaphysalis and Rhipicephalus respectively. Hemaphysalis kutchensis (90.15%) was found to be the predominant species followed by R. haemaphysaloides (6.7%), H. intermedia (1.84%), H. bispinosa (0.61%) and R. sanguineus (0.61%). The present study indicated that caprine theileriosis is an endemic disease in Karnataka and suggested that Haemaphysalis and Rhipicephalus ticks may play a role in transmission of the disease.
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Affiliation(s)
- R. Shruthi
- Department of Veterinary Parasitology, KVAFSU Regional Campus, Veterinary College, Hebbal, Bengaluru, Karnataka India
| | - P. M. Thimmareddy
- Department of Veterinary Parasitology, KVAFSU Regional Campus, Veterinary College, Hebbal, Bengaluru, Karnataka India
| | - G. S. Mamatha
- Department of Veterinary Parasitology, KVAFSU Regional Campus, Veterinary College, Hebbal, Bengaluru, Karnataka India
| | - B. M. Chandranaik
- Centre of Animal Disease Diagnostic Laboratory, Institute of Animal Health and Veterinary Biologicals, Bengaluru, Karnataka India
| | - G. C. Puttalakshmamma
- Department of Veterinary Parasitology, KVAFSU Regional Campus, Veterinary College, Vidyanagar, Hassan, Karnataka India
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Peckle M, Pires MS, Silva CBD, Costa RLD, Vitari GLV, Senra MVX, Dias RJP, Santos HA, Massard CL. Molecular characterization of Theileria equi in horses from the state of Rio de Janeiro, Brazil. Ticks Tick Borne Dis 2017; 9:349-353. [PMID: 29223587 DOI: 10.1016/j.ttbdis.2017.11.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 04/25/2017] [Revised: 09/09/2017] [Accepted: 11/20/2017] [Indexed: 11/30/2022]
Abstract
Theileria equi is one of the etiologic agents of the equine piroplasmosis. This infectious disease is transmitted by ticks and is a worldwide problem in the international horse movement. The 18S rRNA gene of T. equi is often used for genotyping and phylogenetic purpose. This study aimed to analyze the degree of the heterogeneity of the 18S rRNA gene of T. equi in horses from the state of Rio de Janeiro, Brazil. The complete T. equi 18S rRNA sequences were obtained from twenty naturally infected horses. The PCR amplicons were cloned and sequenced. The phylogenetic analyses were performed using a set of T. equi 18S rRNA sequences and other related organisms available in ARB-Silva database. There were twelve distinct T. equi 18S rRNA gene sequences circulating in horses in the state of Rio de Janeiro, Brazil. Monophyletic clades with 2% evolutionary divergence between clades and high bootstrap value were the support to divide T. equi sequences in three distinct clades. The sequences from this study grouped into clades I (70%, n=14/20) and II (30%, n=6/20). All of the T. equi sequences grouped within a node other than the theileriids. This study reported a clear division of two distinct genotypes of T. equi 18S rRNA sequences in state of Rio de Janeiro, Brazil, and it demonstrates that distinct isolates of T. equi can coexist in the same geographic region.
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Affiliation(s)
- Maristela Peckle
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro - UFRRJ, Seropedica, Rio de Janeiro, Brazil.
| | - Marcus Sandes Pires
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro - UFRRJ, Seropedica, Rio de Janeiro, Brazil
| | - Claudia Bezerra da Silva
- Department of Epidemiology and Public Health, Veterinary Institute, Federal Rural University of Rio de Janeiro - UFRRJ, Seropedica, Rio de Janeiro, Brazil
| | - Renata Lins da Costa
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro - UFRRJ, Seropedica, Rio de Janeiro, Brazil
| | - Gabriela Lopes Vivas Vitari
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro - UFRRJ, Seropedica, Rio de Janeiro, Brazil
| | - Marcus Vinicius Xavier Senra
- Department of Zoology, Biologic Sciences Institute, Federal University of Juiz de Fora - UFJF, Juiz de Fora, Minas Gerais, Brazil
| | - Roberto Júnio Pedroso Dias
- Department of Zoology, Biologic Sciences Institute, Federal University of Juiz de Fora - UFJF, Juiz de Fora, Minas Gerais, Brazil
| | - Huarrisson Azevedo Santos
- Department of Epidemiology and Public Health, Veterinary Institute, Federal Rural University of Rio de Janeiro - UFRRJ, Seropedica, Rio de Janeiro, Brazil
| | - Carlos Luiz Massard
- Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro - UFRRJ, Seropedica, Rio de Janeiro, Brazil
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McFadden A, Hart M, Bueno IM, Ha HJ, Heath A, Pulford DJ. Monitoring Theileria orientalis (Ikeda)-associated bovine anaemia in affected cattle over time. Vet Parasitol 2017; 245:29-33. [PMID: 28969833 DOI: 10.1016/j.vetpar.2017.07.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 07/10/2017] [Accepted: 07/31/2017] [Indexed: 11/27/2022]
Abstract
The aim of the study was to observe changes in haematocrit (HCT) over time in a New Zealand South Island dairy herd affected by an outbreak of Theileria-associated bovine anaemia (TABA; Ikeda). A secondary aim was to relate individual cow HCTs to the amount of Theileria orientalis Ikeda DNA present in the blood, as measured by cycle threshold values, using a quantitative PCR (qPCR). Over a 6 month period, blood samples from 19 randomly selected cattle were monitored from a herd of 600 dairy cows. The sampling interval was approximately fortnightly for the first six weeks, followed by sampling at between four and six week intervals. At the initial report of the outbreak, two from six cattle were anaemic (HCT<0.25L/L). Blood collected from 14 cattle 11 days later showed that 57% (95% CI 33-77%) of the cattle sampled were anaemic. Of the 19 cattle that went on to be monitored, 12 (63% 95% CI=41-81%) developed anaemia at some point during the period of monitoring. One of the anaemic animals did not meet the case definition for TABA Ikeda. For individual cattle, the average number of days between when cattle were first detected as anaemic and when HCT returned to normal was 53days (median=47 days, range=6-92 days). At the point of notification the amount of T. orientalis Ikeda DNA in the blood of the six cattle tested was low (Cq median=36), but 11days later the amount of DNA in blood of 14 additional cows tested was relatively high (Cq median=24). Levels of all 19 cows monitored continued to remain moderately high through the period of testing (Cq median=29). This was despite a general improvement in the HCT of affected cattle. In four of the 15 cattle positive to T. orientalis Ikeda where blood fractions (plasma and whole blood) were tested, it appeared that T. orientalis Ikeda (as measured by qPCR) dropped more rapidly in plasma fractions than in whole blood at the point that HCT started to return to normal levels. Despite the assumption that tick populations were low in the Canterbury region of the South Island the impact of TABA (proportion of herd affected and the average period that animals remained anaemic) on the case herd was still relatively high.
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Affiliation(s)
- Amj McFadden
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand.
| | - M Hart
- Vetlife, 4 Hororata-Dunsandel Road, Dunsandel 7657, New Zealand
| | - I M Bueno
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - H J Ha
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
| | - Acg Heath
- Parasitology, AgResearch Ltd., Hopkirk Research Institute, Massey University, Private Bag 11008, Palmerston North 4442, New Zealand
| | - D J Pulford
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand
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Lawrence KE, Summers SR, Heath ACG, McFadden AMJ, Pulford DJ, Tait AB, Pomroy WE. Using a rule-based envelope model to predict the expansion of habitat suitability within New Zealand for the tick Haemaphysalis longicornis, with future projections based on two climate change scenarios. Vet Parasitol 2017; 243:226-234. [PMID: 28807298 DOI: 10.1016/j.vetpar.2017.07.001] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 06/26/2017] [Accepted: 07/01/2017] [Indexed: 12/01/2022]
Abstract
Haemaphysalis longicornis is the only species of tick present in New Zealand which infests livestock and is also the only competent vector for Theileria orientalis. Since 2012, New Zealand has suffered from an epidemic of infectious bovine anaemia associated with T. orientalis, an obligate intracellular protozoan parasite of cattle and buffaloes. The aim of this study was to predict the spatial distribution of habitat suitability of New Zealand for the tick H. longicornis using a simple rule-based climate envelope model, to validate the model against published data and use the validated model to project an expansion in habitat suitability for H. longicornis under two alternative climate change scenarios for the periods 2046-2065 and 2081-2100, relative to the climate of 1981-2010. A rule-based climate envelope model was developed based on the environmental requirements for off-host tick survival. The resulting model was validated against a maximum entropy environmental niche model of environmental suitability for T. orientalis transmission and against a H. longicornis occurrence map. Validation was completed using the I-similarity statistic and by linear regression. The H. longicornis climate envelope model predicted that 75% of cattle farms in the North Island, 3% of cattle farms in the South Island and 54% of cattle farms in New Zealand overall have habitats potentially suitable for the establishment of H. longicornis. The validation methods showed an acceptable level of agreement between the envelope model and published data. Both of the climate change scenarios, for each of the time periods, projected only slight to moderate increases in the average farm habitat suitability scores for all the South Island regions. However, only for the West Coast, Marlborough, Tasman, and Nelson regions did these increases in environmental suitability translate into an increased proportion of cattle farms with low or high H. longicornis habitat suitability. These results will have important implications for the geographical progression of Theileria-associated bovine anaemia (TABA) in New Zealand and will also be of interest to Haemaphysalis longicornis researchers in Australia, Japan, Korea and New Zealand.
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Affiliation(s)
- K E Lawrence
- Massey University, Palmerston North, New Zealand.
| | - S R Summers
- Massey University, Palmerston North, New Zealand.
| | - A C G Heath
- Agresearch Ltd., c/o Hopkirk Research Institute, Private Bag 11008, Palmerston North 4442, New Zealand.
| | - A M J McFadden
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand.
| | - D J Pulford
- Ministry for Primary Industries, PO Box 40742, Upper Hutt 5018, New Zealand.
| | - A B Tait
- National Institute of Water and Atmospheric Research, Greta Point, Wellington, New Zealand.
| | - W E Pomroy
- Massey University, Palmerston North, New Zealand.
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Swilks E, Fell SA, Hammer JF, Sales N, Krebs GL, Jenkins C. Transplacental transmission of Theileria orientalis occurs at a low rate in field-affected cattle: infection in utero does not appear to be a major cause of abortion. Parasit Vectors 2017; 10:227. [PMID: 28482923 PMCID: PMC5423014 DOI: 10.1186/s13071-017-2166-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 08/18/2016] [Accepted: 05/02/2017] [Indexed: 01/08/2023] Open
Abstract
Background Bovine theileriosis, caused by the haemoprotozoan Theileria orientalis, is an emerging disease in East Asia and Australasia. Previous studies have demonstrated transplacental transmission of various Theileria spp. but molecular confirmation of transplacental transmission of T. orientalis has never been confirmed in the field. In this study, cow-calf (< 48 h old) pairs were sampled across 3 herds; opportunistic samples from aborted foetuses or stillborn calves were also examined. Molecular (multiplex qPCR) and serological (ELISA) methods were used to determine infection prevalence and the presence of anti-Theileria antibodies in each herd. In addition, pregnant heifers and foetal calves were sampled at abattoir and tested for the presence of T. orientalis by qPCR. Results The qPCR results indicated that, even though there was a high prevalence of T. orientalis infection in cows, the rate of transplacental transmission to their calves was low, with only one newborn calf from one herd and one foetus from the abattoir testing positive for T. orientalis DNA. Five aborted foetuses and stillborn calves, 3 of which were derived from a herd experiencing a high number of clinical theileriosis cases at the time of sampling, all tested negative for T. orientalis by qPCR. This suggests that in utero infection of calves with T. orientalis may not be a major driver of abortions during theileriosis outbreaks. Temporal monitoring of 20 calves born to T. orientalis-positive mothers indicated that T. orientalis was detectable in most calves between 10 and 27 days post-partum, consistent with prior field studies on adult cattle introduced to Theileria-affected herds. There was a positive correlation between the ELISA ratio of newborn calves and their mothers within 48 h of calving; however, maternal antibodies were only detectable in some calves and only for 4–4.5 weeks post-partum. All calves displayed high parasite loads peaking at 4–8 weeks post-partum, with only some calves subsequently mounting a detectable adaptive antibody response. Conclusions These findings indicate transplacental transmission of T. orientalis appears to play only a minor role in persistence of T. orientalis infection in the field; however calves are highly susceptible to developing high level T. orientalis infections at 4–8 weeks of age regardless of whether maternal antibodies are present post-partum. Electronic supplementary material The online version of this article (doi:10.1186/s13071-017-2166-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Emma Swilks
- School of Animal and Veterinary Sciences, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW, 2678, Australia
| | - Shayne A Fell
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW, 2568, Australia
| | - Jade F Hammer
- Main Street Veterinary Clinic, 325 Main Street, Bairnsdale, Vic, 3875, Australia
| | - Narelle Sales
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW, 2568, Australia
| | - Gaye L Krebs
- School of Animal and Veterinary Sciences, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW, 2678, Australia
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW, 2568, Australia.
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Sudhakara Reddy B, Sivajothi S. Theileria annulata induced brisket oedema in a bull and its successful treatment. J Parasit Dis 2017; 41:171-174. [PMID: 28316407 DOI: 10.1007/s12639-016-0771-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 05/28/2015] [Accepted: 03/08/2016] [Indexed: 11/25/2022] Open
Abstract
In the present case, jugular vein engorgement and oedema of the brisket region which mimic the signs of pseudopericarditis due to theileriosis in a bull was reported. An adult Ongole crossbred bull with history of weakness, anorexia and oedema at brisket region was referred to Teaching Veterinary Clinical Complex, College of Veterinary Science, Proddatur. Physical examination revealed the presence of ticks over the body, right and left prescapular lymphadenopathy and oedema at brisket region. Blood examination revealed the presence of piroplasms in erythrocytes, schizont in lymphocytes, anaemia and lymphopenia. Bull was treated with injection buparvaquone along with supportive medications. By the 3rd week of therapy improvement was noticed by disappearance of brisket oedema and recurrence was not noticed during the 8 months of observation.
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Affiliation(s)
- B Sudhakara Reddy
- Teaching Veterinary Clinical Complex (Veterinary Medicine), College of Veterinary Science, Sri Venkateswara Veterinary University, Y.S.R. District, Proddatur, Andhra Pradesh 516360 India
| | - S Sivajothi
- Department of Veterinary Parasitology, College of Veterinary Science, Sri Venkateswara Veterinary University, Y.S.R. District, Proddatur, Andhra Pradesh 516360 India
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Li Y, Liu Z, Liu J, Yang J, Li Q, Guo P, Guan G, Liu G, Luo J, Yin H, Li Y. Seroprevalence of bovine theileriosis in northern China. Parasit Vectors 2016; 9:591. [PMID: 27863521 PMCID: PMC5116182 DOI: 10.1186/s13071-016-1882-x] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 11/09/2016] [Indexed: 01/19/2023] Open
Abstract
Background Bovine theileriosis is a common disease transmitted by ticks, and can cause loss of beef and dairy cattle worldwide. Here, an indirect enzyme-linked immunosorbent assay (iELISA) based on Theileria luwenshuni surface protein (TlSP) was developed and used to carry out a seroepidemiological survey of bovine theileriosis in northern China. Methods We used the BugBuster Ni-NTA His•Bind Purification Kit to purify recombinant TlSP (rTlSP), which was subsequently analyzed by Western Blotting to evaluate cross-reactivity with other pathogen-positive sera. The iELISA method based on rTlSP was successfully developed. Sera from 2005 blood samples were tested with the rTlSP-iELISA method, and blood smears from these samples were observed by microscopy. Results The specificity of iELISA was 98.9%, the sensitivity was 98.5%, and the cut-off was selected as 24.6%. Western Blot analysis of rTlSP confirmed that there were cross-reactions with Theileria luwenshuni, Theileria uilenbergi, Theileria ovis, Theileria annulata, Theileria orientalis and Theileria sinensis. The epidemiological survey showed that the highest positive rate of bovine theileriosis was 98.3%, the lowest rate was 84.1%, and the average positive rate was 95.4% by iELISA. With microscopy, the highest positive rate was 38.9%, the lowest rate was 5.1%, and the relative average positive rate was 13.7%. Conclusions An rTlSP-iELISA was developed to detect circulating antibodies against bovine Theileria in northern China. This is the first report on the seroprevalence of bovine theileriosis in northern China, and it also provides seroepidemiological data on bovine theileriosis in China.
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Affiliation(s)
- Yaqiong Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Zhijie Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Junlong Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Jifei Yang
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Qian Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Pengfei Guo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Guiquan Guan
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Guangyuan Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China
| | - Jianxun Luo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China.
| | - Hong Yin
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China.
| | - Youquan Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, People's Republic of China.
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He H, Li Y, Liu J, Liu Z, Yang J, Liu A, Chen Z, Ren Q, Guan G, Liu G, Luo J, Yin H. An indirect ELISA for detection of Theileria spp. antibodies using a recombinant protein (rTlSP) from Theileria luwenshuni. Exp Parasitol 2016; 166:89-93. [PMID: 27048941 DOI: 10.1016/j.exppara.2016.03.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 09/23/2015] [Revised: 03/19/2016] [Accepted: 03/31/2016] [Indexed: 11/17/2022]
Abstract
Theileria is a tick-borne, intracellular protozoan parasite of worldwide economic and veterinary importance in small ruminants. Here, an enzyme-linked immunosorbent assay (ELISA) was developed based on Theileria luwenshuni recombinant surface protein (rTlSP) and was used in the standardization and validation of an ELISA for the detection of circulating antibodies against ovine and caprine theileriosis. A total of 233 sera samples were used for the calculation of the cut-off value which served as a threshold between the positive and the negative sera. When the positive threshold was chosen as 19% of the specific mean antibody rate, the specificity was 97.9%, and the sensitivity was 97.1%. There was a cross-reaction with sera against Theileria uilenbergi and Theileria ovis, and no cross-reaction with sera against Babesia spp. in the ELISA and Western blotting. Two hundred forty samples collected from sheep in Gansu province were detected with blood smears and ELISA, respectively. The results showed that the positive rate of Theileria infection in Gansu province were 63.75% with rTlSP-ELISA, and 46.67% with blood smears, respectively. Our test proved that the rTlSP ELISA is suitable to diagnose Theileria infection and could be used in serological surveys to map out the prevalence of ovine and caprine theileriosis.
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Affiliation(s)
- Haining He
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Youquan Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China.
| | - Junlong Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Zhijie Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Jifei Yang
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Aihong Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Ze Chen
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Qiaoyun Ren
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Guiquan Guan
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Guangyuan Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Jianxun Luo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China
| | - Hong Yin
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Xujiaping 1, Lanzhou, Gansu, 730046, PR China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
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Deshmukh AS, Agarwal M, Dhar SK. Regulation of DNA replication proteins in parasitic protozoans: possible role of CDK-like kinases. Curr Genet 2016; 62:481-6. [PMID: 26780367 DOI: 10.1007/s00294-015-0562-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 11/24/2015] [Revised: 12/26/2015] [Accepted: 12/28/2015] [Indexed: 12/30/2022]
Abstract
Regulatory roles of CDKs in fundamental processes including cell cycle progression and transcription are well conserved in metazoans. This family of proteins has undergone significant evolutionary divergence and specialization. Several CDK-like kinases have been identified and characterized in parasitic protozoans. However, clear functional role and physiological relevance of these proteins in protozoans still remain elusive. In continuation with the recent finding that CDK-like protein PfPK5 regulates important DNA replication protein like origin recognition complex subunit 1 in Plasmodium falciparum, here we have discussed the emerging significance of CDK1/2 homologs in DNA replication of parasitic protozoans. In fact, involvement of these proteins in crucial cellular processes projects them as potential drug targets. The possibilities that CDKs offer as potential therapeutic targets in controlling parasite progression have also been explored.
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Affiliation(s)
| | - Meetu Agarwal
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Suman Kumar Dhar
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India.
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Lawrence KE, Gedye K, McFadden AMJ, Pulford DJ, Pomroy WE. An observational study of the vertical transmission of Theileria orientalis (Ikeda) in a New Zealand pastoral dairy herd. Vet Parasitol 2016; 218:59-65. [PMID: 26872929 DOI: 10.1016/j.vetpar.2016.01.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 08/10/2015] [Revised: 12/14/2015] [Accepted: 01/04/2016] [Indexed: 11/19/2022]
Abstract
Although only recently recognised, Theileria orientalis (Ikeda) is now the most important infectious cause of anaemia in New Zealand cattle. The aim of this study was to test if vertical transmission of T. orientalis (Ikeda) from dam to calf across the placenta occurs in naturally infected New Zealand dairy cattle and to also test whether the infection status of the dam at calving affects the future susceptibility of its offspring to T. orientalis (Ikeda) infection. Dairy cows (n=97) and their calves were sampled at calving; and the calves again at 4 months of age. All samples were measured for haematocrit and screened for T. orientalis genotypes using a multiplex Buffeli, Chitose and Ikeda specific TaqMan assay. Ikeda positive samples were further tested by singleplex PCR in triplicate to calculate the Ikeda infection intensity as genomes/μl of blood from each infected animal. No T. orientalis (Ikeda) infected calves were born to either T. orientalis (Ikeda) infected or uninfected dams. There were 56/97 dams positive for T. orientalis (Ikeda) infection at calving and 79/90 calves positive for T. orientalis (Ikeda) infection at 4 months of age but no effect on calf susceptibility of dam infection status at calving. There was a significant negative effect of infection intensity on haematocrit after controlling for whether the infected animal was a dam or a 4 month old calf. Vertical trans-uterine transmission of T. orientalis (Ikeda) infection is unlikely in chronically infected dairy cows and thus not a factor in the epidemiology of T. orientalis (Ikeda) infection.
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Affiliation(s)
- K E Lawrence
- Massey University, Palmerston North, New Zealand.
| | - K Gedye
- Massey University, Palmerston North, New Zealand.
| | - A M J McFadden
- Ministry for Primary Industries, P.O. Box 40742, Upper Hutt 5018, New Zealand.
| | - D J Pulford
- Ministry for Primary Industries, P.O. Box 40742, Upper Hutt 5018, New Zealand.
| | - W E Pomroy
- Massey University, Palmerston North, New Zealand.
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Lawrence K, McFadden A, Gias E, Pulford DJ, Pomroy WE. Epidemiology of the epidemic of bovine anaemia associated with Theileria orientalis (Ikeda) between August 2012 and March 2014. N Z Vet J 2015; 64:38-47. [PMID: 26493076 DOI: 10.1080/00480169.2015.1090894] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AIMS To describe the epidemiology of the epidemic of bovine anaemia associated with Theileria orientalis infection (TABA) in New Zealand between 30 August 2012 and 4 March 2014. METHODS Blood samples and associated data were obtained from cases of TABA. The case definition for TABA was met when piroplasms were present on blood smears and the haematocrit was ≤0.24 L/L. Samples were analysed using quantitative PCR (qPCR) assays for the detection of T. orientalis Ikeda type. Only cases that were positive in the qPCR assays were included in the analysis. A case herd was defined as a herd that had ≥1 animal positive for T. orientalis Ikeda. Movement records for farms were accessed through the national animal identification and tracing scheme. The OR for cattle movements onto a case farm compared to a non-case farm was estimated using a generalised estimating equation model and the geodesic distance for movements onto case and non-case farms compared using Student's t-test. The kernel-smoothed risk of disease at the farm level was calculated using an extraction map and the clustering of diseased farms in time and space was measured using the spatial temporal inhomogeneous pair correlation function. RESULTS In the first 18 months there were 496 case herds; 392 (79%) were dairy and 104 (21%) beef herds. Of 882 individual cases, 820 (93.0%) were positive for T. orientalis Ikeda in the qPCR assays. Case herds were initially clustered in the Northland, then the Waikato regions. The OR for a case farm compared to a non-case farm having ≥1 inward cattle movements was 2.03 (95% CI=1.52-2.71) and the distance moved was 26 (95% CI=20.8-31.3) km greater for case farms. The risk of disease was highest in a north, north-eastern to south, south-western belt across the Waikato region. The spatial-temporal analysis showed significant clustering of infected herds within 20-30 days and up to 15 km distant from a case farm. CONCLUSIONS Theileria orientalis Ikeda type is likely to have been introduced into regions populated with naïve cattle by the movement of parasitaemic cattle from affected areas. Local spread through dispersed ticks then probably became more important for disease transmission between herds once the disease established in a new area. CLINICAL RELEVANCE Dairy and beef farming in the North Island of New Zealand will be significantly changed in the coming years by the incursion of this new disease.
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Affiliation(s)
- K Lawrence
- a Institute of Veterinary, Animal and Biomedical Sciences , Massey University , Palmerston North , New Zealand
| | - Amj McFadden
- b Ministry for Primary Industries , 66 Ward Street, Wallaceville, Upper Hutt , 5018 , New Zealand
| | - E Gias
- b Ministry for Primary Industries , 66 Ward Street, Wallaceville, Upper Hutt , 5018 , New Zealand
| | - D J Pulford
- b Ministry for Primary Industries , 66 Ward Street, Wallaceville, Upper Hutt , 5018 , New Zealand
| | - W E Pomroy
- a Institute of Veterinary, Animal and Biomedical Sciences , Massey University , Palmerston North , New Zealand
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George N, Bhandari V, Reddy DP, Sharma P. Emergence of new genotype and diversity of Theileria orientalis parasites from bovines in India. Infect Genet Evol 2015; 36:27-34. [PMID: 26318544 DOI: 10.1016/j.meegid.2015.08.033] [Citation(s) in RCA: 12] [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] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/06/2015] [Accepted: 08/25/2015] [Indexed: 10/23/2022]
Abstract
Bovine theileriosis is a serious threat to livestock worldwide. Uncertainty around species prevalence, antigenic diversity and genotypes of strains make it difficult to assess the impact of this parasite and to provide necessary treatment. We aimed to characterize genotypic diversity, phylogeny and prevalence of Theileria orientalis parasites from the states of Telangana and Andhra Pradesh, India by collecting bovine blood samples from the major districts of the two states. Bioinformatic analysis identified antigenic diversity among the prevalent parasite strains using major piroplasm surface protein (MPSP) gene. Our study revealed a prevalence rate of 4.8% (n=41/862) of T. orientalis parasites in bovine animals and a new genotype of T. orientalis parasite which was not previously reported in India. The emergence of these new genotypes could be an explanation for the frequent outbreaks of bovine theileriosis. Further, whole genome sequencing of T. orientalis strains will help to elucidate the genetic factors relevant for transmissibility and virulence as well as vaccine and new drug development.
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Affiliation(s)
- Neena George
- National Institute of Animal Biotechnology-DBT, Hyderabad, India
| | | | - D Peddi Reddy
- National Institute of Animal Biotechnology-DBT, Hyderabad, India
| | - Paresh Sharma
- National Institute of Animal Biotechnology-DBT, Hyderabad, India.
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Zainalabidin FA, Raimy N, Yaacob MH, Musbah A, Bathmanaban P, Ismail EA, Mamat ZC, Zahari Z, Ismail MI, Panchadcharam C. The prevalence of parasitic infestation of small ruminant farms in perak, malaysia. Trop Life Sci Res 2015; 26:1-8. [PMID: 26019746 PMCID: PMC4437319] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
Helminthiasis due to strongyles such as Haemonchus contortus, coccidiosis caused by Eimeria sp. and blood parasite diseases such as theileriosis by Theileria sp. have been reported to cause severe morbidity and mortality annually in small ruminants in Malaysia. The aims of this study were to investigate the prevalence of helminthiasis, coccidiosis and theileriosis and to determine the packed cell volume (PCV) value of small ruminants in Perak, Malaysia. Blood and faecal samples were obtained from a total of 175 animals from 7 small ruminant farms in Kampar, Larut Matang and Selama, Kuala Kangsar and Manjung districts in Perak; the samples were examined for parasitic infestations from April to July 2011. The results of this study show that H. contortus was found in 152 (86.86%) animals, Eimeria sp. was found in 162 (92.57%) animals and the blood protozoa Theileria sp. was found in 25 (14.30%) animals. The PCV values of all of these animals were recorded between 7% and 44%. A total of 42 (24%) animals were anaemic, with a PCV of less than 21%. Continuous monitoring of small ruminant farms will provide important information for assisting farmers with managing the spread of parasitic infections and maintaining the productivity of animals.
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Affiliation(s)
- Fazly Ann Zainalabidin
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Nurulaini Raimy
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Muhamad Hazmi Yaacob
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Adnan Musbah
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Premalaatha Bathmanaban
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Erwanas Asmar Ismail
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Zaini Che Mamat
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Zawida Zahari
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Mohd Iswadi Ismail
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
| | - Chandrawathani Panchadcharam
- Veterinary Research Institute, Department of Veterinary Services, 59, Jalan Sultan Azlan Shah, 31400 Ipoh, Perak, Malaysia
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Lu Y, Wang Y, Li Y, Gou H, Luo J, Yin H, Liu Z. Identification and characterization of Tu88, an antigenic gene from Theileria uilenbergi. Exp Parasitol 2015; 153:63-7. [PMID: 25770598 DOI: 10.1016/j.exppara.2015.03.003] [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: 10/23/2014] [Revised: 02/13/2015] [Accepted: 03/03/2015] [Indexed: 10/23/2022]
Abstract
Theileria uilenbergi is a pathogen that causes ovine theileriosis. Prevention and control of theileriosis relies on its diagnosis at early stages of occurrence and requires understanding of proteins with antigenic properties from the pathogen. Despite its prevalence in China, only a few molecules with antigenic properties have been characterized from T. uilenbergi. In this study, we identified a cDNA named Tu88 by immunoscreening a T. uilenbergi merozoite cDNA library with T. uilenbergi-positive sera from infected sheep. Recombinant Tu88 (rTu88) expressed in bacteria reacted strongly with the positive sera of T. uilenbergi in western blot analysis indicating its potential as an antigen. Southern blot analysis showed that it is a single copy gene. Protein localization by immunostaining blood smears from an infected sheep demonstrated the presence of native Tu88 in merozoites. These findings suggest that Tu88 is a potential candidate antigen for the development of a sero-diagnostic tool.
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Affiliation(s)
- Yizhu Lu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Yuefeng Wang
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Youquan Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Huitian Gou
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Jianxun Luo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China
| | - Hong Yin
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases, Yangzhou, China.
| | - Zhijie Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, China.
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40
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Arjmand Yamchi J, Tavassoli M. Survey on infection rate, vectors and molecular identification of Theileria annulata in cattle from North West, Iran. J Parasit Dis 2014; 40:1071-6. [PMID: 27605839 DOI: 10.1007/s12639-014-0636-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 11/26/2014] [Accepted: 12/11/2014] [Indexed: 10/24/2022] Open
Abstract
Tropical theileriosis is a progressive bovine lymphoproliferative disease caused by the intracellular protozoan parasite Theileria annulata. In this study 138 blood samples and 289 ticks were collected and examined from cattle that belonged to 10 randomly selected flocks. The Tbs-S/Tbs-A primer set was used for PCR amplification of Theileria spp. and the Ta-S/Tbs-A specific primer set was used in semi-nested PCR technique for detection of T. annulata. Blood smears of each case were examined by Giemsa staining method. The semi-nested PCR accurately revealed 22 (15.94 %) positive samples; whereas Giemsa staining method could detect 15 (10.86 %) out of 138 blood samples. The examination of 289 ticks by semi-nested PCR revealed that, 32.86 % of Hyalomma anatulicum anatulicum, 26.47 % of Hyalomma anatulicum excavatum and 22.42 % of Hyalomma asiaticum asiaticum, were infected with T. annulata. The results suggest that H. anatulicum anatolicum may play a major role in transmission of T. annulata infection in Iran. The results indicated that the Giemsa staining method, having low sensitivity, while the semi-nested PCR technique can be used as a gold standard method for this purpose.
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Affiliation(s)
- Jafar Arjmand Yamchi
- Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Mousa Tavassoli
- Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
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Hostettler I, Müller J, Stephens CE, Haynes R, Hemphill A. A quantitative reverse-transcriptase PCR assay for the assessment of drug activities against intracellular Theileria annulata schizonts. Int J Parasitol Drugs Drug Resist 2014; 4:201-9. [PMID: 25516828 DOI: 10.1016/j.ijpddr.2014.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/01/2014] [Accepted: 09/04/2014] [Indexed: 12/15/2022]
Abstract
Quantitative RT real time PCR was used to assess metabolic impairment of Theileria schizonts. The method was validated with buparvaquone. Buparvaquone acts directly and rapidly on the parasite within 1 h of treatment. Electron microscopy confirmed these findings. A series of anti-parasitic compounds and antibiotics acted primarily on the host cells.
Intracellular schizonts of the apicomplexans Theileria annulata and Theileria parva immortalize bovine leucocytes thereby causing fatal immunoproliferative diseases. Buparvaquone, a hydroxynaphthoquinone related to parvaquone, is the only drug available against Theileria. The drug is only effective at the onset of infection and emerging resistance underlines the need for identifying alternative compounds. Current drug assays employ monitoring of proliferation of infected cells, with apoptosis of the infected host cell as a read-out, but it is often unclear whether active compounds directly impair the viability of the parasite or primarily induce host cell death. We here report on the development of a quantitative reverse transcriptase real time PCR method based on two Theileria genes, tasp and tap104, which are both expressed in schizonts. Upon in vitro treatment of T. annulata infected bovine monocytes with buparvaquone, TaSP and Tap104 mRNA expression levels significantly decreased in relation to host cell actin already within 4 h of drug exposure, while significant differences in host cell proliferation were detectable only after 48–72 h. TEM revealed marked alterations of the schizont ultrastructure already after 2 h of buparvaquone treatment, while the host cell remained unaffected. Expression of TaSP and Tap104 proteins showed a marked decrease only after 24 h. Therefore, the analysis of expression levels of mRNA coding for TaSP and Tap104 allows to directly measuring impairment of parasite viability. We subsequently applied this method using a series of compounds affecting different targets in other apicomplexan parasites, and show that monitoring of TaSP- and Tap104 mRNA levels constitutes a suitable tool for anti-theilerial drug development.
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Sarma K, Prasad H, Das G, Behera P, Behera SK, Rajesh JB, Borthakur SK. Theileriasis in crossbred cows and its therapeutic management: first report from Lushai hill district of Mizoram. J Parasit Dis 2014; 40:605-10. [PMID: 27605754 DOI: 10.1007/s12639-014-0545-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 04/11/2014] [Accepted: 08/22/2014] [Indexed: 10/24/2022] Open
Abstract
To know the prevalence of theileriosis infection, haemato-biochemical alteration and efficacy of Oxytetracycline in combination with Diaminazene aceturate injection against theileriosis in Lushai hill district of Mizoram; fifty five cross bred cattle were screened during July, 2013 to November, 2013. The prevalence of tropical theileriosis was 9.09 % based on blood smear examination. Clinical features of the disease were manifested by high rise of body temperature 104.8 ± 1.2 °F, lymphadenopathy, inability to walk, anorexia, listlessness, moderate anaemia, nasal discharge, edema of eye and corneal opacity. There were marked decline (P < 0.01) in the haemoglobin 5.28 ± 1.81 gm/dl, total erythrocytic count 2.14 ± 0.7 × 10(6)/ul, packed cell volume 18.10 ± 0.8 % and total leukocyte count 6.95 ± 1.05 × 10(3)/ul, respectively. Erythrocyte sedimentation rate was significantly increased (P < 0.01) up to 104.5 ± 12.4 mm/1st hour. The percentage of neutrophils increased 62.75 ± 2.77 and lymphocytes decreased drastically 28.69 ± 1.45 as compared with un-infected cross bred cattle. Clinically infected cattle with Theileria annulata had significantly low levels of total proteins and albumin, (P < 0.05) but AST, total, direct and indirect bilirubin, BUN, creatinine levels and Ck-MB activity were significantly high (P < 0.05). Oxytetracycline in combination with Diaminazene aceturate was found effective against T. annulata and could control fever and temperature returns to normalcy by 7th day post treatment along with some haemato-biochemical profiles. In brief, the study revealed that tropical theileriosis was prevalent in Lushai hill district of Mizoram especially among cross breed cattle and had effect on hepatic, renal and cardiac function which can be effectively controlled by Oxytetracycline and Diaminazene aceturate injection.
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Affiliation(s)
- Kalyan Sarma
- Department of Veterinary Medicine, College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram India
| | - H Prasad
- Department of Veterinary Medicine, College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram India
| | - Gunjan Das
- Department of Veterinary Medicine, College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram India
| | - P Behera
- Department of Veterinary Medicine, College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram India
| | - S K Behera
- Department of Veterinary Medicine, College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram India
| | - J B Rajesh
- Department of Veterinary Medicine, College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram India
| | - S K Borthakur
- Department of Veterinary Parasitology, College of Veterinary Sciences and Animal Husbandry, Central Agricultural University, Selesih, Aizawl, Mizoram India
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Makungu C, Mwacalimba KK. A quantitative risk assessment of bovine theileriosis entering Luapula Province from Central Province in Zambia via live cattle imports from traditional and commercial production sectors. Prev Vet Med 2014; 116:63-74. [PMID: 24974081 DOI: 10.1016/j.prevetmed.2014.05.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 06/21/2013] [Revised: 05/15/2014] [Accepted: 05/19/2014] [Indexed: 11/26/2022]
Abstract
Theileriosis or East Coast Fever (ECF) is an important livestock disease widespread in Zambia except for some provinces such as Luapula. This freedom status has been achieved due to strict livestock movement regulations that only authorise cattle imports from commercial farms implementing strict ECF control regimens. Recent increases in both the demand and price of beef in Zambia are stimulating a policy change towards a more inclusive inter-provincial trade in live cattle. This may also encourage the introduction of breeding cattle from high production pastoral sectors such as Central Province to stimulate the beef industry in disease free low production areas such as the Luapula Province. To estimate and compare the risks linked with those potential introductions of cattle from the traditional or commercial production sectors of the Central Province, a quantitative risk assessment model was developed. This risk comparison was necessary because the traditional livestock production sector accounts for over 79% of breeding cattle trade in Central Province but is characterised by minimalistic tick-borne disease control and a higher prevalence of ECF. We estimate that should the importation of breeding cattle from Central into Luapula Province be permitted, we could expect to import ECF by the introduction of infected animals at a median rate (5th and 95th percentiles) of every 0.44 years (0.12, 2.60), from the traditional sector compared to every 3.57 years (0.37, 103.6) from the commercial sector. Infected ticks would be expected to enter every 3.46 (0.66, 43.8) years via traditional cattle imports. These risks are strongly influenced by the prevalence of infection, performance of pre-transport screening tests, and the effectiveness of pre-transport tick cleansing. This assessment is expected to provide a model for tick borne disease risk assessments in similar settings, as well as inform ECF control, cattle trade, and stock movement policies in Zambia.
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Affiliation(s)
- C Makungu
- Provincial Epidemiology & Information Centre (PEIC)-Central Province, Department of Veterinary Services, Ministry of Agriculture & Livestock, 45 Pauling Street, P.O. Box 80285, Kabwe, Zambia
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Hassan MA, Raoofi A, Lotfollahzadeh S, Javanbakht J. Clinical and cytological characteristics and prognostic implications on sheep and goat Theileria infection in north of Iran. J Parasit Dis 2013; 39:190-3. [PMID: 26063998 DOI: 10.1007/s12639-013-0318-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 05/07/2013] [Accepted: 05/20/2013] [Indexed: 11/30/2022] Open
Abstract
The present research was carried out during 3 months from early June through late August, in northern zones of Iran. In addition, the present study was performed on 300 sheep and goats, in which 50 specimens were isolated based on clinical signs, blood smears and lymph node puncture. The results indicated clinical signs of theileriosis in sheep (with more prominent signs) and goats were diagnosable. The reliable clinical signs in sheep and goats included fever, tachycardia, cough, increased respiratory rate, mucosal pallor, anorexia, ruminal hypomotility and lymph node enlargement. Furthermore, the frequency of cough, abnormal pulmonary sounds, anorexia and ruminal hypomotility were significantly more in sheep than goats (P < 0.05).
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Affiliation(s)
| | - Afshin Raoofi
- Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Samad Lotfollahzadeh
- Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Javad Javanbakht
- Departemnt of Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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