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Perez de Vargas A, Habeeba S, Farouk M, Al Hbabi B, Al Otaiba A, Al Muhairi S, Al Hammadi Z, Shah AA. Molecular detection and characterization of a novel Theileria genotype in Dama Gazelle (Nanger dama). Int J Parasitol Parasites Wildl 2023; 21:55-58. [PMID: 37124672 PMCID: PMC10140743 DOI: 10.1016/j.ijppaw.2023.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/04/2023] [Accepted: 04/10/2023] [Indexed: 05/02/2023]
Abstract
Wild animals play a critical role in maintenance and transmission of various tick-borne pathogens. It is essential to identify these wild host species that can serve as important reservoirs of tickborne diseases. In the present study we investigated Dama gazelle (Nanger dama) as a potential novel reservoir of Theileria spp. A total of 53 blood samples collected from Dama gazelle as part of the Al Ain Zoo preventive medicine program were screened for Theileria spp. by qPCR using a commercial assay, followed by additional studies using conventional PCR targeting an approximate 450-base pair (bp) fragment of the V4 hypervariable region of the 18S ribosomal RNA (rRNA) gene. Sequencing and phylogenetic analysis of a subset (20) of PCR amplicons revealed Theileria isolates from gazelles of Al Ain Zoo clustered closely to Theileria sp. Dama Gazelle (AY735115) from USA and were far away or did not cluster with the known Theileria spp. of ruminants namely T. annulata, T. ovis, T. orientalis, T. luwenshuni, T.parva and T.sinensis. Theileria genotypes detected in gazelles of present study were clearly distinct from the other common theileria species of ruminants. The present finding throws light on the critical role of reservoir host in maintenance and transmission of pathogen.
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Affiliation(s)
- Ana Perez de Vargas
- Life Sciences Department, Al Ain Zoo, United Arab Emirates
- Corresponding author. Veterinary Diagnostic & Research Unit, Life Sciences Department, Al Ain Zoo, United Arab Emirates.
| | - Shameem Habeeba
- Veterinary Laboratories Division, Abu Dhabi Agriculture and Food Safety Authority, United Arab Emirates
| | - Mohd Farouk
- Veterinary Laboratories Division, Abu Dhabi Agriculture and Food Safety Authority, United Arab Emirates
| | | | - Amna Al Otaiba
- Life Sciences Department, Al Ain Zoo, United Arab Emirates
| | - Salama Al Muhairi
- Veterinary Laboratories Division, Abu Dhabi Agriculture and Food Safety Authority, United Arab Emirates
| | - Zulaikha Al Hammadi
- Veterinary Laboratories Division, Abu Dhabi Agriculture and Food Safety Authority, United Arab Emirates
| | - Asma Abdi Shah
- Veterinary Laboratories Division, Abu Dhabi Agriculture and Food Safety Authority, United Arab Emirates
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Hossain MJ, Raut S, Singh RP, Mishra P, Hossain MS, Dey AR, Kabir A, Anisuzzaman, Talukder MH, Shahiduzzaman M. Molecular detection of Babesia and Theileria from crossbred cattle in Sirajganj and Rangpur districts of Bangladesh. Vet Med Sci 2023; 9:899-906. [PMID: 36331989 PMCID: PMC10029904 DOI: 10.1002/vms3.989] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Babesia and Theileria are potential threats to the livestock industry, causing considerable economic losses. These tick-borne blood parasites are more prevalent in crossbred cattle than local cattle in Bangladesh. OBJECTIVES To confirm the species of Babesia and Theileria in crossbred cattle from the northern part of Bangladesh using conventional and molecular tools. METHODS A total of 385 crossbred cattle blood samples were subjected to DNA extraction and PCR. For molecular detection, B. bigemina rhoptry-associated protein 1a, B. bovis spherical body protein-4, and Theileria spp. 18S rRNA were used as the marker genes. RESULTS Using PCR, only 72 (18.7%) samples were found piroplasm positive, of which 12.2% Theileria, 4.7% Babesia, and 1.8% mixed infections. Both Babesia (7.3%), Theileria (7.7%) and mixed (2.8%) infections were detected in Sirajganj, and only Theileria (20.4%) was detected in Rangpur district. By PCR and nPCR we detected B. bigemina and T. annulata in Sirajganj district, and Theileria sp. in Rangpur district. The target gene sequences of isolated pathogens confirmed B. bigemina and T. annulata, and Theileria sp from these samples. Blood smears of all samples were also examined microscopically for Babesia and/or Theileria spp. and 14.3% of samples were found positive, of which 5.9% Babesia and 8.3% Theileria. Generally, the pathogens detected in Sirajgang and Rangpur were genetically related to South Asia, particularly South East Asian isolates. CONCLUSIONS These findings provide information for a better understanding of the epidemiology of Babesia and Theileria as well as to improve the approaches for diagnosis and control of tick-borne diseases in Bangladesh.
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Affiliation(s)
- Md Jakir Hossain
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Sanjana Raut
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Rahul Pratap Singh
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Pravin Mishra
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md Shahadat Hossain
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Anita Rani Dey
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Ajran Kabir
- Department of Microbiology & Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Anisuzzaman
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | | | - Md Shahiduzzaman
- Department of Parasitology, Bangladesh Agricultural University, Mymensingh, Bangladesh
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Clift SJ, Martí-Garcia B, Lawrence JA, Mitchell EP, Fehrsen J, Martínez J, Williams JH, Steyl JCA. Theileriosis in naturally infected roan antelope ( Hippotragus equinus). Vet Pathol 2022; 59:1031-1046. [PMID: 36052867 DOI: 10.1177/03009858221120011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cases of Theileria-associated mortality are rarely reported in African wild artiodactyls. Descriptions of lesions are limited, particularly in endangered hippotraginids. Here, we analyzed retrospectively the gross and histologic findings in 55 roan antelope (Hippotragus equinus) with fatal natural theileriosis. The most frequently recorded gross findings in 40 cases were widespread petechiae and ecchymoses (72.5%), probable anemia (67.5%), icterus (60%), splenomegaly (60%), hepatomegaly (52.5%), and pulmonary edema (50%). Histologic lesions in 34 cases were characterized by multi-organ infiltrates of parasitized and nonparasitized mononuclear leukocytes (MLs), and fewer multinucleate giant cells (MNGCs). Liver, lung, kidney, adrenal gland, and heart were most consistently infiltrated, followed by spleen and lymph nodes. Leukocytes were phenotyped in lung, liver, kidney, and heart specimens from 16 cases, using immunohistochemistry to detect CD20, CD3, myeloid/histiocyte antigen (MAC387), IBA-1, and CD204 surface receptors. A roan polyclonal anti-Theileria sp. (sable) antibody was applied to the same tissues to identify intraleukocytic parasite antigens. Similar proportions of intravascular and extravascular IBA-1-, CD204-, and MAC387-reactive putative monocyte-macrophages and fewer CD3-positive putative T-lymphocytes were identified in all organs, especially the lungs in infected roan. CD20-positive putative B-lymphocytes were significantly scarcer than in uninfected controls. Intraleukocytic Theileria parasites labeled consistently in affected tissues. Some parasitized and nonparasitized MLs and the MNGCs failed to label with selected leukocyte markers. Fatal theileriosis in roans may largely be the result of multi-organ monocyte-macrophage activation with associated tissue injury and overwhelming systemic inflammation. The identity of the parasitized leukocytes and characteristics of the lymphohistiocytic response require further clarification in roans.
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Affiliation(s)
| | | | | | | | - Jeanni Fehrsen
- University of Pretoria, Onderstepoort, South Africa.,ARC-Onderstepoort Veterinary Research, Onderstepoort, South Africa
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Clift SJ, Collins NE, Oosthuizen MC, Steyl JCA, Lawrence JA, Mitchell EP. The Pathology of Pathogenic Theileriosis in African Wild Artiodactyls. Vet Pathol 2019; 57:24-48. [PMID: 31854265 DOI: 10.1177/0300985819879443] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The published literature on schizont-"transforming," or pathogenic theileriosis, in African wild artiodactyls is dated and based on limited information. Here the authors review the taxonomy, diagnosis, epidemiology, hematology, pathology, and aspects of control in various species. Molecular studies based on 18S and 16S rRNA gene sequences have shown that African wild artiodactyls are commonly infected with diverse Theileria spp., as well as nontheilerial hemoprotozoa and rickettsia-like bacteria, and coinfections with pathogenic and nonpathogenic Theileria species are often recorded. Although theileriosis is still confusingly referred to as cytauxzoonosis in many species, the validity of a separate Cytauxzoon genus in artiodactyls is debated. The epidemiology of theileriosis is complex; the likelihood of fatal disease depends on the interplay of parasite, vertebrate host, tick vector, and environmental factors. Roan calves (Hippotragus equinus) and stressed animals of all host species are more susceptible to fatal theileriosis. Even though regenerative anemia is common, peripheral blood piroplasm parasitemia does not correlate with disease severity. Other than anemia, common macroscopic lesions include icterus, hemorrhages (mucosal, serosal, and tissue), fluid effusions into body cavities, lung edema, and variably sized raised cream-colored foci of leukocyte infiltration in multiple organs. Histopathologic findings include vasocentric hyperproliferation and lysis of atypical leukocytes with associated intracellular schizonts, parenchymal necrosis, hemorrhage, thromboembolism, and edema. Immunophenotyping is required to establish the identity of the schizont-transformed leukocytes in wild ungulates. Throughout the review, we propose avenues for future research by comparing existing knowledge on selected aspects of theileriosis in domestic livestock with that in African wild artiodactyls.
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Affiliation(s)
- Sarah J Clift
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Nicola E Collins
- Vectors and Vector-Borne Diseases Research Program, Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Marinda C Oosthuizen
- Vectors and Vector-Borne Diseases Research Program, Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Johan C A Steyl
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - John A Lawrence
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Emily P Mitchell
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
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Ringo AE, Aboge GO, Adjou Moumouni PF, Hun Lee S, Jirapattharasate C, Liu M, Gao Y, Guo H, Zheng W, Efstratiou A, Galon EM, Li J, Thekisoe O, Inoue N, Suzuki H, Xuan X. Molecular detection and genetic characterisation of pathogenic Theileria, Anaplasma and Ehrlichia species among apparently healthy sheep in central and western Kenya. ACTA ACUST UNITED AC 2019; 86:e1-e8. [PMID: 31291731 PMCID: PMC6620505 DOI: 10.4102/ojvr.v86i1.1630] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 01/15/2019] [Accepted: 01/15/2019] [Indexed: 12/15/2022]
Abstract
Tick-borne diseases (TBDs) caused by Theileria, Babesia, Anaplasma and Ehrlichia species are common in tropical and subtropical regions. In this study, we investigated the presence and genetic diversity of Theileria spp., Anaplasma ovis, B. ovis, E. ruminantium and Anaplasma spp. in sheep from the Machakos and Homa Bay counties of Kenya. In order to improve the diagnosis and control of ovine TBDs, a total of 76 blood samples from apparently healthy sheep were screened using a polymerase chain reaction (PCR). The assays were conducted using primers based on Theileria spp. 18S rRNA, Anaplasma ovis Major surface protein-4 (AoMSP4), B. ovis 18S rRNA, E. ruminantium pCS20 and Anaplasma spp. 16S rRNA. The overall infection rates for Theileria spp., A. ovis, E. ruminantium and Anaplasma spp. were 39/76 (51.3%), 26/76 (34.2%), 6/76 (7.9%) and 31/76 (40.8%), respectively. The overall co-infection was 47/76 (61.8%). All Theileria spp. positive samples were confirmed to be of Theileria ovis on sequencing. A phylogenetic analysis of the 18S rRNA gene sequences of T. ovis revealed that all isolates of this study clustered with T. ovis sequences extracted from the GenBank suggesting this gene is highly conserved. E. ruminantium pCS20 sequences were in the same clade on the phylogenetic tree. However, three AoMSP4 sequences from this study appeared in the same clade, while one sequence formed a separate branch revealing genetic divergence. The 16S rRNA sequencing revealed uncharacterised Anaplasma spp. and A. ovis. The phylogenetic analyses of the uncharacterised Anaplasma spp. revealed that the two sequences from this study appear in an independent clade from other sequences extracted from the GenBank. This study provides important information regarding the occurrence of tick-borne pathogens and their degree of genetic diversity among sheep in Kenya, which is useful for the diagnosis and control of TBDs.
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Affiliation(s)
- Aaron E Ringo
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine.
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