1
|
Udonsom R, Adisakwattana P, Popruk S, Reamtong O, Jirapattharasate C, Thiangtrongjit T, Rerkyusuke S, Chanlun A, Hasan T, Kotepui M, Siri S, Nishikawa Y, Mahittikorn A. Evaluation of Immunodiagnostic Performances of Neospora caninum Peroxiredoxin 2 (NcPrx2), Microneme 4 (NcMIC4), and Surface Antigen 1 (NcSAG1) Recombinant Proteins for Bovine Neosporosis. Animals (Basel) 2024; 14:531. [PMID: 38396498 PMCID: PMC10885977 DOI: 10.3390/ani14040531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 01/22/2024] [Accepted: 02/03/2024] [Indexed: 02/25/2024] Open
Abstract
Bovine neosporosis is among the main causes of abortion in cattle worldwide, causing serious economic losses in the beef and dairy industries. A highly sensitive and specific diagnostic method for the assessment of the epidemiology of the disease, as well as it surveillance and management, is imperative, due to the absence of an effective treatment or vaccine against neosporosis. In the present study, the immunodiagnostic performance of Neospora caninum peroxiredoxin 2 (NcPrx2), microneme 4 (NcMIC4), and surface antigen 1 (NcSAG1) to detect IgG antibodies against N. caninum in cattle were evaluated and compared with that of the indirect fluorescent antibody test (IFAT). The results revealed that NcSAG1 had the highest sensitivity and specificity, with values of 88.4% and 80.7%, respectively, followed by NcPrx2, with a high sensitivity of 87.0% but a low specificity of 67.0%, whereas NcMIC4 showed sensitivity and specificity of 84.1% and 78.9%, respectively, when compared with IFAT. A high degree of agreement was observed for NcSAG1 (k = 0.713) recombinant protein, showing the highest diagnostic capability, followed by NcMIC4 (k = 0.64) and NcPrx2 (k = 0.558). The present study demonstrates that NcSAG1 is helpful as an antigen marker and also demonstrates the potential immunodiagnostic capabilities of NcPrx2 and NcMIC4, which could serve as alternative diagnostic markers for detecting N. caninum infection in cattle. These markers may find utility in future treatment management, surveillance, and risk assessment of neosporosis in livestock or other animal host species. Further research should be directed toward understanding the in vivo immune response differences resulting from immunization with both recombinant proteins.
Collapse
Affiliation(s)
- Ruenruetai Udonsom
- Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (R.U.); (S.P.)
| | - Poom Adisakwattana
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand;
| | - Supaluk Popruk
- Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (R.U.); (S.P.)
| | - Onrapak Reamtong
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (O.R.); (T.T.)
| | - Charoonluk Jirapattharasate
- Department of Pre-Clinic and Animal Science, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand;
| | - Tipparat Thiangtrongjit
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (O.R.); (T.T.)
| | - Sarinya Rerkyusuke
- Division of Livestock Medicine, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (S.R.); (A.C.)
| | - Aran Chanlun
- Division of Livestock Medicine, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (S.R.); (A.C.)
| | - Tanjila Hasan
- Department of Medicine and Surgery, Faculty of Veterinary Medicine, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, Bangladesh;
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan
| | - Manas Kotepui
- Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand;
| | - Sukhontha Siri
- Department of Epidemiology, Faculty of Public Health, Mahidol University, Bangkok 10400, Thailand;
| | - Yoshifumi Nishikawa
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan
| | - Aongart Mahittikorn
- Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; (R.U.); (S.P.)
| |
Collapse
|
2
|
Novoa MB, Aguirre N, Ormaechea N, Palmero S, Valentini B, Vanzini V, Molineri AI. Evaluation of frequency of antibodies against Neospora caninum, Toxoplasma gondii and Brucella melitensis, risk factors and spatial distribution of infection in goat and sheep flocks from Argentina. Vet Parasitol Reg Stud Reports 2023; 46:100939. [PMID: 37935540 DOI: 10.1016/j.vprsr.2023.100939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 09/19/2023] [Accepted: 10/09/2023] [Indexed: 11/09/2023]
Abstract
Neospora caninum, Toxoplasma gondii and Brucella melitensis are pathogens that cause abortion in small ruminants. Besides, B. melitensis and T. gondii are zoonotic pathogens. The aim of this study was to describe the frequency of antibodies against N. caninum, T. gondii and B. melitensis in sheep and goats from three provinces of the center region of Argentina. In addition, the spatial distribution of the infected flocks/herds and risk factors were evaluated. A cross-sectional study was conducted from 2015 through 2016. Serum samples from 4783 goats and 1524 sheep from 186 goat, 51 sheep and 38 mixed flocks/herds were analyzed. Competitive inhibition enzyme-linked immunosorbent assay (ciELISA) and indirect fluorescent antibody test (IFAT) were performed for detection of antibodies against N. caninum and IFAT for T. gondii. The buffered plate antigen test and complement fixation test were performed for detection of antibodies against B. melitensis. The frequency of anti-T. gondii antibodies was 41.2% and 29.7% for sheep and goats, respectively. The frequency of anti-N. caninum antibodies was 17.2% and 14% for sheep and goats, respectively. About 97.1% of the sheep flocks, 79.4% of the goat herds and the 91.3% of the mixed flocks had seropositive animals to T. gondii. About 61.8% of the sheep flocks, 58% of the goat herds and the 82.6% of the mixed flocks had seropositive animals to N. caninum. All the analyzed animals were negative to anti-B. melitensis antibodies. For T. gondii, a significant cluster of high risk of seropositive flocks/herds was detected in the littoral of the Parana River. The province of origin of the flock/herd was the only variable associated to T. gondii positivity (p = 0.003). Animals from Santiago del Estero and Santa Fe Provinces had 3.48 and 1.77 times more risk to be positive to T. gondii than animals from Entre Ríos Province, respectively. For N. caninum, a cluster of high risk of seropositive flocks/herds was detected in the north of Santa Fe Province. The only explanatory variable associated to N. caninum positivity was animal species (p = 0.003). Sheep had 1.73 times more risk to be positive to N. caninum than goats. The absence of antibodies against B. melitensis in all the analyzed animals is an important finding for the public health of the region. Since bordering provinces have infected flocks/herds, brucellosis in small ruminants should be under epidemiologic surveillance in the region.
Collapse
Affiliation(s)
- Maria Belen Novoa
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Ruta 34, km 227, CP 2300, Rafaela, Santa Fe, Argentina.
| | - Nerina Aguirre
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Ruta 34, km 227, CP 2300, Rafaela, Santa Fe, Argentina
| | - Nadia Ormaechea
- Instituto de Ciencias Veterinarias del Litoral (ICiVet-Litoral), Kreder 2805, CP 3080, Esperanza, Santa Fe, Argentina
| | - Sebastian Palmero
- Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral (UNL), Kreder 2805, CP 3080, Esperanza, Santa Fe, Argentina
| | - Beatriz Valentini
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Ruta 34, km 227, CP 2300, Rafaela, Santa Fe, Argentina
| | - Victor Vanzini
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Ruta 34, km 227, CP 2300, Rafaela, Santa Fe, Argentina
| | - Ana Ines Molineri
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Ruta 34, km 227, CP 2300, Rafaela, Santa Fe, Argentina
| |
Collapse
|
3
|
Udonsom R, Mahittikorn A, Prachasuphap A, Jongpitisub K, Dhepakson P, Jirapattharasate C. Recombinant Dense Granule Protein (NcGRA4) Is a Novel Serological Marker for Neospora caninum Infection in Goats. Animals (Basel) 2023; 13:1879. [PMID: 37889832 PMCID: PMC10251823 DOI: 10.3390/ani13111879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/01/2023] [Accepted: 06/03/2023] [Indexed: 10/29/2023] Open
Abstract
Neospora caninum is widely recognised as one of the most significant causes of abortion in cattle, with infections also occurring in sheep and goats. To prevent and control animal neosporosis, it is crucial to develop sensitive and specific methods for detecting N. caninum infection. Recently, several recombinant proteins have been utilised in serological assays for the diagnosis of neosporosis. In this study, we used commercial gene synthesis to produce dense granular antigen 4 (NcGRA4) recombinant protein. NcGRA4 plasmids were expressed in the Escherichia coli system and then purified. The purified recombinant protein was analysed using sodium dodecyl sulphate-polyacrylamide gel electrophoresis. To evaluate the diagnostic potential of recombinant NcGRA4 protein, we tested 214 serum samples from goat farms via indirect enzyme-linked immunosorbent assay (iELISA) and compared the results to those from the indirect fluorescent antibody test (IFAT). Western blotting analysis revealed a single NcGRA4 band with an expected molecular weight of 32 kDa. The specific IgG against N. caninum was detected in 34.1% and 35% of samples evaluated by NcGRA4 iELISA and IFAT, respectively. The sensitivity and specificity of the NcGRA4 iELISA were 71.6% and 86.3%, respectively, when compared with the results from IFAT. Our results demonstrate that a recombinant protein that can be used to detect animal neosporosis can be produced using a synthetic NcGRA4 gene. Overall, recombinant NcGRA4 shows promise as a sensitive and specific serological marker for identifying target IgG in goat samples.
Collapse
Affiliation(s)
- Ruenruetai Udonsom
- Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok 10400, Thailand; (R.U.); (A.M.)
| | - Aongart Mahittikorn
- Department of Protozoology, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok 10400, Thailand; (R.U.); (A.M.)
| | - Apichai Prachasuphap
- Department of Medical Sciences, Medical Life Sciences Institute, 88/7 Tiwanon Road, Talad Kwan Subdistrict, Muang District, Nonthaburi 11000, Thailand; (A.P.); (K.J.); (P.D.)
| | - Kodcharad Jongpitisub
- Department of Medical Sciences, Medical Life Sciences Institute, 88/7 Tiwanon Road, Talad Kwan Subdistrict, Muang District, Nonthaburi 11000, Thailand; (A.P.); (K.J.); (P.D.)
| | - Panadda Dhepakson
- Department of Medical Sciences, Medical Life Sciences Institute, 88/7 Tiwanon Road, Talad Kwan Subdistrict, Muang District, Nonthaburi 11000, Thailand; (A.P.); (K.J.); (P.D.)
| | - Charoonluk Jirapattharasate
- Department of Pre-Clinic and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, 999 Phuthamonthon Sai 4 Rd, Salaya, Nakhon Pathom 73170, Thailand
| |
Collapse
|
4
|
Udonsom R, Reamtong O, Adisakwattana P, Popruk S, Jirapattharasate C, Nishikawa Y, Inpankaew T, Toompong J, Kotepui M, Mahittikorn A. Immunoproteomics to identify species-specific antigens in Neospora caninum recognised by infected bovine sera. Parasite 2022; 29:60. [PMID: 36562441 PMCID: PMC9879140 DOI: 10.1051/parasite/2022059] [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: 06/17/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022] Open
Abstract
Bovine neosporosis is a disease of concern due to its global distribution and significant economic impact through massive losses in the dairy and meat industries. To date, there is no effective chemotherapeutic drug or vaccine to prevent neosporosis. Control of this disease is therefore dependent on efficient detection tests that may affect treatment management strategies. This study was conducted to identify the specific immunoreactive proteins of Neospora caninum tachyzoites recognised by sera from cattle infected with N. caninum, Toxoplasma gondii, Cryptosporidium parvum, Babesia bovis and B. bigemina, and by sera from uninfected cattle using two-DE dimensional gel electrophoresis (2-DE) combined with immunoblot and mass spectrometry (LC-MS/MS). Among 70 protein spots that reacted with all infected sera, 20 specific antigenic spots corresponding to 14 different antigenic proteins were recognised by N. caninum-positive sera. Of these immunoreactive antigens, proteins involved in cell proliferation and invasion process were highly immunogenic, including HSP90-like protein, putative microneme 4 (MIC4), actin, elongation factor 1-alpha and armadillo/beta-catenin-like repeat-containing protein. Interestingly, we discovered an unnamed protein product, rhoptry protein (ROP1), possessing strong immunoreactivity against N. caninum but with no data on function available. Moreover, we identified cross-reactive antigens among these apicomplexan parasites, especially N. caninum, T. gondii and C. parvum. Neospora caninum-specific immunodominant proteins were identified for immunodiagnosis and vaccine development. The cross-reactive antigens could be evaluated as potential common vaccine candidates or drug targets to control the diseases caused by these apicomplexan protozoan parasites.
Collapse
Affiliation(s)
- Ruenruetai Udonsom
-
Department of Protozoology, Faculty of Tropical Medicine, Mahidol University Bangkok 10400 Thailand
| | - Onrapak Reamtong
-
Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University Bangkok 10400 Thailand
| | - Poom Adisakwattana
-
Department of Helminthology, Faculty of Tropical Medicine, Mahidol University Bangkok 10400 Thailand
| | - Supaluk Popruk
-
Department of Protozoology, Faculty of Tropical Medicine, Mahidol University Bangkok 10400 Thailand
| | - Charoonluk Jirapattharasate
-
Department of Pre-clinic and Animal Science, Faculty of Veterinary Science, Mahidol University Salaya Nakhon Pathom 73170 Thailand
| | - Yoshifumi Nishikawa
-
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine Obihiro Hokkaido 080-8555 Japan
| | - Tawin Inpankaew
-
Department of Parasitology, Faculty of Veterinary Medicine, Kasetsart University Bangkok 10900 Thailand
| | - Jitbanjong Toompong
-
Department of Parasitology, Faculty of Veterinary Medicine, Mahanakorn University of Technology Bangkok 10530 Thailand
| | - Manas Kotepui
-
Medical Technology, School of Allied Health Sciences, Walailak University Tha Sala Nakhon Si Thammarat 80160 Thailand
| | - Aongart Mahittikorn
-
Department of Protozoology, Faculty of Tropical Medicine, Mahidol University Bangkok 10400 Thailand
,Corresponding author:
| |
Collapse
|
5
|
Novoa MB, Soler JP, Cirone KM, Hecker YP, Valentini BS, Primo ME, Moore DP. Use and comparison of serologic assays to detect anti-Neospora caninum antibodies in farmed red deer (Cervus elaphus). Vet Parasitol 2022; 313:109839. [DOI: 10.1016/j.vetpar.2022.109839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/11/2022] [Accepted: 11/12/2022] [Indexed: 11/22/2022]
|
6
|
The global seroprevalence of Neospora caninum infection in deer: a systematic review and meta-analysis study. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
7
|
Benavides J, González-Warleta M, Arteche-Villasol N, Pérez V, Mezo M, Gutiérrez-Expósito D. Ovine Neosporosis: The Current Global Situation. Animals (Basel) 2022; 12:ani12162074. [PMID: 36009665 PMCID: PMC9405361 DOI: 10.3390/ani12162074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/17/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary This review summarizes the current global situation of Neospora caninum infection in sheep by referring to all of the available descriptions of natural ovine neosporosis to date, focusing on epidemiology, clinical signs, lesions, and diagnosis. The data suggest that ovine neosporosis is more prevalent than currently thought, that it has increased in the last few decades, and that it should now be considered in the differential diagnosis when investigating abortion in sheep. Abstract In the past 20 years, Neospora caninum infection in sheep has been reported in at least 31 countries worldwide from all sheep-rearing continents (Europe, Asia, the Americas, Africa, and Oceania), and its role as an abortifacient agent is becoming more evident. Most studies of ovine neosporosis have focused on its epidemiology, based primarily on serological analysis, with only a few studies investigating the actual presence of the parasite by PCR and/or IHC. Individual seroprevalence rates were highly variable between countries, and even between regions within the same country, ranging from 0.0% to 67.4% positive. Furthermore, most of the studies were not directly comparable due to differences in experimental designs, sample sizes, husbandry systems, ecological factors, and serological tests (e.g., IFAT, ELISA, MAT, Western blot). The latter, along with the scarcity of studies on the relevance of N. caninum as an abortifacient agent, may bias the perception of the importance of this disease. This review summarizes the situation of N. caninum infection in sheep using all available published studies describing natural ovine neosporosis. The epidemiology shows that ovine neosporosis is found worldwide, and it poses a relevant risk to the sustainability of sheep flocks.
Collapse
Affiliation(s)
- Julio Benavides
- Instituto de Ganadería de Montaña, CSIC-University of Leon, Grulleros, 24346 León, Spain
| | - Marta González-Warleta
- Centro de Investigaciones Agrarias de Mabegondo, Parasitology Laboratory, Axencia Galega da Calidade Alimentaria (AGACAL)-Xunta de Galicia, Ctra, Betanzos a Mesón do Vento km 7, Abegondo, 15318 A Coruña, Spain
| | - Noive Arteche-Villasol
- Instituto de Ganadería de Montaña, CSIC-University of Leon, Grulleros, 24346 León, Spain
- Animal Health Department, Faculty of Veterinary, University of Leon, Campus de Vegazana s/n, 24071 León, Spain
| | - Valentín Pérez
- Instituto de Ganadería de Montaña, CSIC-University of Leon, Grulleros, 24346 León, Spain
- Animal Health Department, Faculty of Veterinary, University of Leon, Campus de Vegazana s/n, 24071 León, Spain
| | - Mercedes Mezo
- Centro de Investigaciones Agrarias de Mabegondo, Parasitology Laboratory, Axencia Galega da Calidade Alimentaria (AGACAL)-Xunta de Galicia, Ctra, Betanzos a Mesón do Vento km 7, Abegondo, 15318 A Coruña, Spain
| | - Daniel Gutiérrez-Expósito
- Instituto de Ganadería de Montaña, CSIC-University of Leon, Grulleros, 24346 León, Spain
- Animal Health Department, Faculty of Veterinary, University of Leon, Campus de Vegazana s/n, 24071 León, Spain
- Correspondence:
| |
Collapse
|
8
|
Hebbar BK, Mitra P, Khan W, Chaudhari S, Shinde S, Deshmukh AS. Seroprevalence and associated risk factors of Toxoplasma gondii and Neospora caninum infections in cattle in Central India. Parasitol Int 2021; 87:102514. [PMID: 34781014 DOI: 10.1016/j.parint.2021.102514] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/01/2021] [Accepted: 11/09/2021] [Indexed: 11/18/2022]
Abstract
Toxoplasma gondii and Neospora caninum are closely related cyst-forming parasites identified as important causes of reproductive failures in ruminants. While these parasites have been reported worldwide, seroprevalence and associated risk factors for cattle infections have not been determined in India. A total of 576 serum samples of cattle were analyzed for antibodies to T. gondii and N. caninum using enzyme-linked immunosorbent assay (ELISA), modified/Neospora agglutination test (MAT/NAT), and an indirect fluorescent antibody test (IFAT-tachyzoite and bradyzoite). Additionally, general information about cattle, movement of cats and dogs, the menace of rodents, management, and reproductive disorders were assessed to identify the potential risk factors. Overall, 32.9% (190/576) serum samples reacted positively to T. gondii and 24.8% (143/576) to N. caninum. The performance of the diagnostic tests showed excellent agreement between IFAT and ELISA (kappa [κ] = 0.98) and between MAT/NAT and ELISA (κ = 0.97). Combining both infections on avidity test, 94% sera had high-IgG avidity, and 3% had low-IgG avidity antibodies, indicating chronic infection in the majority of the cases. The identified risk factors (p < 0.05) for exposure to T. gondii were: increasing age (Odds Ratio [OR]: 2.02), movement of cat (OR: 4.8) and rodents (OR: 1.57) in the farm; and for N. caninum: increasing age (OR: 1.6), movement of dogs in the farm (OR: 2.07), drinking pond water (OR: 1.64) and abortion (OR: 1.82). These findings revealed that T. gondii and N. caninum infections are widespread in the study area and suggest conducting nationwide epidemiological studies owing to their economic importance.
Collapse
Affiliation(s)
- Bhavana K Hebbar
- Molecular Parasitology Laboratory, DBT-National Institute of Animal Biotechnology, Hyderabad, India
| | - Pallabi Mitra
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Waqar Khan
- Department of Veterinary Public Health & Epidemiology, Nagpur Veterinary College, Nagpur, India
| | - Sandeep Chaudhari
- Department of Veterinary Public Health & Epidemiology, Nagpur Veterinary College, Nagpur, India
| | - Shilpshri Shinde
- Department of Veterinary Public Health & Epidemiology, Nagpur Veterinary College, Nagpur, India
| | - Abhijit S Deshmukh
- Molecular Parasitology Laboratory, DBT-National Institute of Animal Biotechnology, Hyderabad, India.
| |
Collapse
|
9
|
Ferreira RF, Dittrich RL, Zimmermann IB, Ljubic BB, Mrljak V, Eckersall PD. Differential acute-phase protein responses in dogs seropositive or seronegative for Neospora caninum. Parasitol Res 2021; 120:3529-3535. [PMID: 34427786 DOI: 10.1007/s00436-021-07277-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 08/02/2021] [Indexed: 11/28/2022]
Abstract
Neospora caninum is one of the most prevalent Apicomplexa parasites that causes abortion in cattle, as it infects dogs as its definitive host, causing subclinical disease or active neosporosis, marked by meningoencephalitis, and myopathies with muscle and neuromuscular signs of disease. This study aimed to evaluate the acute phase protein response in dogs seropositive and seronegative for N. caninum. Serum samples of 72 dogs were tested by an immunofluorescence antibody test using N. caninum NC-1 strain, and the study population was divided into four groups: symptomatic - muscular and/or neuromuscular signs - and seropositive (n = 16); symptomatic and seronegative (n = 9); asymptomatic and seropositive (n = 34); and asymptomatic and seronegative (n = 13). C-reactive protein (CRP) was measured via immunoturbidimetric assay and serum haptoglobin (Hp) via hemoglobin-binding capacity assay. In the symptomatic groups, seropositive dogs had higher levels of Hp, but not CRP, while seronegative dogs had higher CRP levels. There was no difference in CRP concentration in asymptomatic dogs. Dogs with neuromuscular signs had higher concentrations for Hp in the group seropositive. Hp concentration did not differ between dogs seropositive and seronegative dogs for each group. Serum Hp and CRP could not sufficiently alone flag subclinical infections. Measurement of CRP and Hp concentrations could be clinically valuable to the diagnosis of neurological diseases, and their relative change may indicate the stage of the infection, although their sole use is not able to support the diagnosis of canine neosporosis. Further studies are encouraged to evaluate the specific dynamics of acute phase proteins in canine neosporosis. Serum samples of 72 dogs were tested by an immunofluorescence antibody test using N. caninum NC-1 strain, and the study population was divided into four groups: (1) dogs with muscular and/or neuromuscular signs and seropositive for N. caninum; (2) dogs with muscular and/or neuromuscular signs and seronegative for N. caninum; (3) dogs seropositive for N. caninum with no neuromuscular signs; and (4) healthy dogs and seronegative for N. caninum. The study evaluated if N. caninum infection could have pathophysiological changes activating the acute phase response and an increase in the concentration of acute phase proteins in serum.
Collapse
Affiliation(s)
- Rafaela Furioso Ferreira
- Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia.
- Department of Veterinary Medicine, Federal University of Paraná, Curitiba, Brazil.
| | | | | | | | - Vladimir Mrljak
- Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
| | - Peter David Eckersall
- Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, G61 1QH, UK
| |
Collapse
|
10
|
Sevá ADP, Chiebao DP, Brandão APD, Godoy SN, Jimenez-Villegas T, Pena HFJ, Ferreira F. Seroprevalence and incidence of Toxoplasma gondii and Neospora caninum infection in naturally exposed domestic dogs from a rural area of São Paulo state, Brazil. ACTA ACUST UNITED AC 2020; 29:e008820. [PMID: 33027425 DOI: 10.1590/s1984-29612020053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 06/02/2020] [Indexed: 11/21/2022]
Abstract
Dogs are hosts of the protozoans Toxoplasma gondii, which causes an important public health disease, and Neospora caninum. Studies that have evaluated toxoplasmosis and neosporosis for prolonged periods in dog populations are rare. We analyzed infection by both parasites in a domestic dog population over three consecutive years in São Paulo state, Brazil. In the 1st, 2nd and 3rd years of collection, 181, 193 and 172 domiciles were visited, and blood samples of 331, 371 and 348 dogs were collected for antibody serology, respectively. The seroprevalence of T. gondii in each year was 27.2%, 22.5% and 43.9%, respectively, and that of N. caninum was 7.8%, 4.8% and 6.8%, respectively. The incidence rates for T. gondii in the 2nd and 3rd collections were 13.2% and 30.0%, and those for N. caninum were 3.3% and 4.4%, respectively. Positive and negative serological conversions for both agents occurred at high frequencies during the study period. This study reveals the canine population's serological profile and demonstrates the constant exposure of dogs to the investigated pathogens, indicating the need for prevention and control measures in the region.
Collapse
Affiliation(s)
- Anaiá da Paixão Sevá
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Universidade de São Paulo - USP, São Paulo, SP, Brasil.,Departamento de Ciências Exatas e Tecnológicas, Universidade Estadual de Santa Cruz - UESC, Ilhéus, BA, Brasil
| | - Daniela Pontes Chiebao
- Centro de Pesquisa de Sanidade Animal, Instituto Biológico de São Paulo, São Paulo, SP, Brasil
| | - Ana Perola Drulla Brandão
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Universidade de São Paulo - USP, São Paulo, SP, Brasil
| | - Silvia Neri Godoy
- Instituto Chico Mendes de Conservação da Biodiversidade, São Sebastião, SP, Brasil
| | - Tatiana Jimenez-Villegas
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Universidade de São Paulo - USP, São Paulo, SP, Brasil
| | - Hilda Fátima Jesus Pena
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Universidade de São Paulo - USP, São Paulo, SP, Brasil
| | - Fernando Ferreira
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Universidade de São Paulo - USP, São Paulo, SP, Brasil
| |
Collapse
|
11
|
Novoa MB, Aguirre NP, Ormaechea N, Palmero S, Rouzic L, Valentini BS, Sarli M, Orcellet VM, Marengo R, Vanzini VR, Primo ME. Validation and field evaluation of a competitive inhibition ELISA based on the recombinant protein tSAG1 to detect anti-Neospora caninum antibodies in sheep and goats. Vet Parasitol 2020; 284:109201. [PMID: 32801057 DOI: 10.1016/j.vetpar.2020.109201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/05/2020] [Accepted: 08/06/2020] [Indexed: 10/23/2022]
Abstract
Neospora caninum is a protozoan parasite that causes abortion and reproductive failure in small ruminants. We validated and evaluated under field conditions a competitive inhibition ELISA based on the truncated SAG1 protein (tSAG1) from N. caninum for the detection of anti-N. caninum antibodies in sheep and goat flocks. The assay was validated using 80 positive and 142 negative serum samples from sheep and goats analyzed by IFAT and immunoblot (IB). ciELISAtSAG1 was then used to evaluate the prevalence of anti-N. caninum antibodies in 1449 goats from 143 flocks and 385 sheep from 40 flocks and compared to IFAT. The prevalence of anti-Toxoplasma gondii antibodies was evaluated by IFAT. The ciELISAtSAG1 cut-off was ≥ 36 percent inhibition, with a diagnostic sensitivity of 100.0 % (95 % CI = 95.4-100.0 %) and a diagnostic specificity of 98.6 % (95 % CI = 95.0-99.8 %) relative to the agreement between IFAT and IB. The field evaluation revealed a concordance between ciELISAtSAG1 and IFAT of 97.4 %, with an agreement (κ) of 0.90 for sheep sera, and a concordance of 96.5 % with κ = 0.85 for goat sera. The overall prevalence of anti-N. caninum antibodies in sheep was 14.3 % by IFAT and 15.8 % by ciELISAtSAG1. In goats, prevalence was 12.9 % by IFAT and 14.6 % by ciELISAtSAG1. The overall prevalence of anti-T. gondii antibodies was 28.8 % in goats and 43.8 % in sheep. The ciELISAtSAG1 could be useful for large-scale detection of anti-N. caninum antibodies in sheep and goats, and for seroepidemiological investigations due to its appropriate sensitivity and specificity, and the simplicity of production.
Collapse
Affiliation(s)
- María Belén Novoa
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, National Route 34, Km 227 (2300), Rafaela, Santa Fe, Argentina; National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina.
| | - Nerina Patricia Aguirre
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, National Route 34, Km 227 (2300), Rafaela, Santa Fe, Argentina
| | - Nadia Ormaechea
- Faculty of Veterinary Science, National University of the Littoral (UNL), Kreder 2805 (S3080HOF), Esperanza, Santa Fe, Argentina
| | - Sebastián Palmero
- Faculty of Veterinary Science, National University of the Littoral (UNL), Kreder 2805 (S3080HOF), Esperanza, Santa Fe, Argentina
| | - Lisandro Rouzic
- Faculty of Veterinary Science, National University of the Littoral (UNL), Kreder 2805 (S3080HOF), Esperanza, Santa Fe, Argentina
| | - Beatriz Susana Valentini
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, National Route 34, Km 227 (2300), Rafaela, Santa Fe, Argentina
| | - Macarena Sarli
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, National Route 34, Km 227 (2300), Rafaela, Santa Fe, Argentina; National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina
| | - Viviana Mercedes Orcellet
- Faculty of Veterinary Science, National University of the Littoral (UNL), Kreder 2805 (S3080HOF), Esperanza, Santa Fe, Argentina
| | - Rafael Marengo
- Faculty of Veterinary Science, National University of the Littoral (UNL), Kreder 2805 (S3080HOF), Esperanza, Santa Fe, Argentina
| | - Victor René Vanzini
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, National Route 34, Km 227 (2300), Rafaela, Santa Fe, Argentina
| | - María Evangelina Primo
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, National Route 34, Km 227 (2300), Rafaela, Santa Fe, Argentina; National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina
| |
Collapse
|
12
|
Novoa MB, Valentini BS, Sarli M, Torioni-de-Echaide SM, Primo ME, Echaide IE. Evaluation of a competitive inhibition ELISA based on the recombinant protein tSAG1 to detect anti- Neospora caninum antibodies in cattle. J Vet Diagn Invest 2020; 32:401-408. [PMID: 32306865 DOI: 10.1177/1040638720916711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Neospora caninum is a protozoan parasite that causes abortion and important economic losses in cattle worldwide. There are no treatments or vaccines available; disease control is based on diagnosis and herd management strategies. We developed, validated, and evaluated under field conditions a competitive inhibition ELISA based on the truncated SAG1 protein (tSAG1), expressed in Escherichia coli, and the RafNeo5 monoclonal antibody (ciELISAtSAG1). A criterion based on the 3-y sequential serologic analysis of 230 dairy cows by IFAT was used as the gold standard. The assay was validated using 860 serum samples from cows that were consistently positive or negative by IFAT throughout the study period. ciELISAtSAG1 was then used to evaluate the prevalence of neosporosis in 16 beef cow herds (22 samples per herd, 352 total samples). The results were compared with those from IFAT and a commercial cELISA (cELISAVMRD). The ciELISAtSAG1 cutoff was ≥ 29%I, with a diagnostic sensitivity of 98.7% (95% CI = 96.8-99.7%) and a diagnostic specificity of 97.9% (95% CI = 96.4-99.0%). Concordance among IFAT, cELISAVMRD, and ciELISAtSAG1 was 90.3%. The agreement (κ) between ciELISAtSAG1 and the other 2 tests was ≥ 0.81. The overall prevalence of neosporosis in the 16 beef herds was 30% (range: 5-60%). The ciELISAtSAG1 could be useful for large-scale detection of anti-N. caninum antibodies in cattle and seroepidemiologic investigations, given its appropriate sensitivity and specificity, and the simplicity of production.
Collapse
Affiliation(s)
- María B Novoa
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, Santa Fe, Argentina (Novoa, Valentini, Sarli, Torioni-de-Echaide, Primo, Echaide).,National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina (Novoa, Sarli, Primo)
| | - Beatriz S Valentini
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, Santa Fe, Argentina (Novoa, Valentini, Sarli, Torioni-de-Echaide, Primo, Echaide).,National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina (Novoa, Sarli, Primo)
| | - Macarena Sarli
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, Santa Fe, Argentina (Novoa, Valentini, Sarli, Torioni-de-Echaide, Primo, Echaide).,National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina (Novoa, Sarli, Primo)
| | - Susana M Torioni-de-Echaide
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, Santa Fe, Argentina (Novoa, Valentini, Sarli, Torioni-de-Echaide, Primo, Echaide).,National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina (Novoa, Sarli, Primo)
| | - María E Primo
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, Santa Fe, Argentina (Novoa, Valentini, Sarli, Torioni-de-Echaide, Primo, Echaide).,National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina (Novoa, Sarli, Primo)
| | - Ignacio E Echaide
- Laboratory of Veterinary Immunology and Parasitology, National Institute of Agricultural Technology (INTA), Rafaela Agricultural Experimental Station, Santa Fe, Argentina (Novoa, Valentini, Sarli, Torioni-de-Echaide, Primo, Echaide).,National Scientific and Technical Research Council (CONICET), Santa Fe, Argentina (Novoa, Sarli, Primo)
| |
Collapse
|
13
|
Aleri JW, Laurence M. A description of biosecurity practices among selected dairy farmers across Australia. ANIMAL PRODUCTION SCIENCE 2020. [DOI: 10.1071/an19340] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Aims
The study investigated critical biosecurity control points and dairy farmers’ motivations towards biosecurity practices among selected dairy farmers across Australia.
Methods
A questionnaire template was administered via an online survey. A three-stage process was used to develop the questionnaire by pooling of potential questions, selection and reduction of the questions to fit an 8–10 min survey.
Key results
A total of 55 responses were obtained. Mixed species rearing was practiced on 69% of the farms, with a majority keeping either sheep or beef cattle within the same property as dairy cattle. Approximately half of the farms (49%) did not provide formal training to new staff on aspects of animal health, as well as not conducting bull breeding soundness. Most of the farms (98%) required staff to use personal protective equipment, such as overalls and gumboots, but only a few of the farms (34%) had designated areas to clean footwear and a system for recording visitors (17%). Record keeping pertaining to animal health, maintenance of good fences and use of vendor declaration forms was practiced in a majority of the farms. The practice of quarantining new stock before mixing with other stock was practiced in only 45% of the farms. Monthly herd health visits by a veterinarian were utilised by 55% of the farms. Multivariable analysis showed positive significant associations between mixed species rearing with the practice of regular pest control (P = 0.004) and use of footbaths (P = 0.024) and no biosecurity plan (P = 0.025). Furthermore, a positive significant association was also recorded on the presence of a biosecurity plan and the presence of a designated area to clean footwear (P = 0.002) and no regular deworming (P = 0.024). Animal and human health reasons were the main motivators for implementing and maintaining ‘best practice’ biosecurity practices, whereas government regulation was the lowest motivator.
Conclusions
It is concluded that the biosecurity practices were variable, and animal and human health reasons were the primary motivators for instituting biosecurity practices.
Implications
There is a need to continue educating farmers on the importance of biosecurity practices.
Collapse
|
14
|
Lefkaditis M, Mpairamoglou R, Sossidou A, Spanoudis K, Tsakiroglou M. Neospora caninum, A potential cause of reproductive failure in dairy cows from Northern Greece. VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2019; 19:100365. [PMID: 32057391 PMCID: PMC7103951 DOI: 10.1016/j.vprsr.2019.100365] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 11/11/2019] [Accepted: 12/06/2019] [Indexed: 11/29/2022]
Abstract
Neospora caninum infection has been reported in a large number of intermediate hosts, such as ruminants, rabbits, mice, etc. but neosporosis has emerged as a serious disease in cattle and dogs worldwide. Abortions and other infertility issues have been reported in the infected cows, leading to great economic losses in farmers. The aim of our study was to assess N. caninum seroprevalence in dairy cattle from Northern Greece (region of Xanthi) by using the indirect fluorescent antibody technique. Blood samples were collected from 875 Holstein – Friesian dairy cows and tested for Neospora caninum antibodies. Among the cows that were studied, 184 (21.03%) were positive for N. caninum antibodies and concurrently their farms had a known previous history of infertility problems, such as abortions, increased number of artificial inseminations needed for conception, increased rate of returning to estrus and retention of fetal membranes. Neosporis is a common parasitosis in dairy cows. The number of abortions was significantly higher in seropositive cows. In seropositive cows the number of artificial inseminations was increased. The birth interval was much more longer in the N. caninum seropositive cows. Significant economic loss was observed in the infected farms.
Collapse
Affiliation(s)
- M Lefkaditis
- Veterinary Faculty, School of Health Sciences, University of Thessaly, Greece.
| | - R Mpairamoglou
- Veterinary Faculty, School of Health Sciences, University of Thessaly, Greece
| | - A Sossidou
- Veterinary Faculty, School of Health Sciences, University of Thessaly, Greece
| | - K Spanoudis
- Veterinary Faculty, School of Health Sciences, University of Thessaly, Greece.
| | - M Tsakiroglou
- Veterinary Faculty, School of Health Sciences, University of Thessaly, Greece
| |
Collapse
|
15
|
Ouslimani SF, Tennah S, Azzag N, Derdour SY, China B, Ghalmi F. Seroepidemiological study of the exposure to Toxoplasma gondii among horses in Algeria and analysis of risk factors. Vet World 2019; 12:2007-2016. [PMID: 32095054 PMCID: PMC6989325 DOI: 10.14202/vetworld.2019.2007-2016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 11/14/2019] [Indexed: 11/16/2022] Open
Abstract
AIM The aim of this study was to assess the seroprevalence of the Toxoplasma gondii in horses in different parts of Algeria and to determine risk factors for the infection. MATERIALS AND METHODS A total of 736 blood samples were collected from horses of various breeds, gender, coat colors, and ages. All horses came from various farms, racecourses, and equestrian centers. The seroprevalence was investigated by three different methods: Indirect fluorescent antibody test (IFAT) as reference method, enzyme-linked immunosorbent assay (ELISA), and latex agglutination test (LAT). RESULTS Out of the 736 sera, 178 (24.18%) were positive for IFAT, 133 (18.07%) for LAT, and 317 (43.07%) for ELISA. It was found that IFAT and LAT were in high agreement (Kappa 0.79), indicating that LAT and IFAT had similar capabilities in the detection of anti-T. gondii antibodies from horse sera. Risk factors analysis based on IFAT results indicated that the habit of the animals was significant risk factors (p≤0.05) for Toxoplasma infection. The seroprevalence was significantly higher in horses living on farms. Moreover, a higher seroprevalence was found in older animals compared to younger ones. Furthermore, the seroprevalence in females was significantly higher than that in males and gelding. Breed, coat color, and water sources are also important factors to influence the seroprevalence of T. gondii. CONCLUSION The results indicated that T. gondii is present in horses throughout Algeria and thus represents a risk for both human and animal health. These results underline the need to increase the vigilance and the preventive measures against this disease not only to protect the horses but also to limit the spread of the parasite.
Collapse
Affiliation(s)
- Sabrine Fazia Ouslimani
- Research Laboratory Management of Local Animal Resources, Higher National Veterinary School of Algiers, Oued Smar, Algiers 16000, Algeria
| | - Safia Tennah
- Research Laboratory Management of Local Animal Resources, Higher National Veterinary School of Algiers, Oued Smar, Algiers 16000, Algeria
| | - Naouelle Azzag
- Research Laboratory Management of Local Animal Resources, Higher National Veterinary School of Algiers, Oued Smar, Algiers 16000, Algeria
| | - Salima Yamina Derdour
- Research Laboratory Management of Local Animal Resources, Higher National Veterinary School of Algiers, Oued Smar, Algiers 16000, Algeria
| | - Bernard China
- Sciensano (Research Institute and The National Public Health Institute of Belgium), Juliette Wytsman street 14, 1050 Brussels, Belgium
| | - Farida Ghalmi
- Research Laboratory Management of Local Animal Resources, Higher National Veterinary School of Algiers, Oued Smar, Algiers 16000, Algeria
| |
Collapse
|
16
|
Appelt MA, da Silva AS, Cazarotto CJ, Machado G, Rodrigues RS, Norbury LJ, Baldissera MD, Alba DF, Gris A, Mendes RE. Cholinesterase as an inflammatory marker of subclinical infection of dairy cows infected by Neospora caninum and risk factors for disease. Comp Immunol Microbiol Infect Dis 2019; 66:101330. [PMID: 31437690 DOI: 10.1016/j.cimid.2019.101330] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/25/2019] [Accepted: 06/26/2019] [Indexed: 01/11/2023]
Abstract
The aim of this study was to evaluate the seroprevalence of Neospora caninum in dairy cows, as well as to verify the risk factors for N. caninum infection and inflammatory response in dairy cows. Using the indirect immunofluorescence reaction, the seroprevalence of neosporosis was determined to be 32.82%. Based on regression analysis, the presence of dogs at a farm increased the probability of a cow testing positive for N. caninum (OR = 20.01 [5.21-123.12]). These data suggest that N. caninum has a relevant prevalence in dairy cows of the Microregion of Rio do Sul (Brazil), with elevated frequencies of anti-N. caninum IgG. The data also suggest that the parasite is widely distributed in dairy herds of the micro-region, because 94.4% of properties screened had at least one seropositive animal. The principal risk factors for disease maintenance in herds may be considered the presence of dogs and absence of a diagnostic test when introducing new animals. Blood from these cows was used to measure variables related to the inflammatory response. Serum cholinesterase activity, as well as serum levels of globulins and C-reactive protein were higher in seropositive to N. caninum than in seronegative cows. Furthermore, the infection by parasite causes an intense inflammatory process, contributing to disease pathophysiology.
Collapse
Affiliation(s)
- Marciana Anita Appelt
- Postgraduate course in Animal Production and Health, Instituto Federal Catarinense (IFC), Concórdia, SC, Brazil
| | | | | | - Gustavo Machado
- College of Veterinary Medicine, North Carolina State University - NCSU, Raleigh, EUA, United States
| | | | - Luke James Norbury
- School of Science, Royal Melbourne Institute of Technology (RMIT) University, Bundoora, 3083, Victoria, Australia
| | - Matheus D Baldissera
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Davi F Alba
- Graduate Program in Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, SC, Brazil
| | - Anderson Gris
- Veterinary Pathology Laboratory, IFC, Concórdia, SC, Brazil
| | - Ricardo Evandro Mendes
- Postgraduate course in Animal Production and Health, Instituto Federal Catarinense (IFC), Concórdia, SC, Brazil; Veterinary Pathology Laboratory, IFC, Concórdia, SC, Brazil.
| |
Collapse
|
17
|
Rezvan H, Khaki A, Namavari M, Abedizadeh R. An investigation of the concurrency of anti- Neospora antibody and parasitemia in water buffalo ( Bubalus bubalis) in northwest of Iran. VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2019; 10:79-84. [PMID: 31183020 PMCID: PMC6522196 DOI: 10.30466/vrf.2019.34314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 07/24/2018] [Indexed: 01/26/2023]
Abstract
Neospora caninum is an obligate intracellular parasite causing abortion and reproductive failure in ruminants. Here, the seroprevalence of Neospora DNA and anti-Neospora antibodies and the correlation between the DNA and the antibody using polymerase chain reaction (PCR) and a new developed whole cell-based enzyme-linked immunosorbent assay (ELISA) in water buffalo (Bubalus bubalis) were investigated. To determine the level of anti-Neospora antibody, 83 serum samples were collected from buffaloes in the northwest of Iran. Plates were coated with 2 × 106 whole Neospora tachyzoites and the anti-Neospora antibody level was determined by calculating the ratio of sample/positive control (S/P) optical densities (ODs) in the ELISA. All samples with the ration of 0.50 or above were accounted as positive. To confirm the presence of Neospora DNA, the serum samples were directly subjected to PCR and nested PCR for detection of Neospora NC5 gene without the DNA isolation process. A total number of 83 buffalo serum samples were examined for the presence of anti-N. caninum immunoglobulin G and Neospora DNA. All samples with the S/P ratio of 0.50 or above (16 samples, 19.27%) were also positive for Neospora DNA. All samples with OD less than 0.50 (34 samples, 40.96%) were negative for Neospora DNA. However, 33 samples with the S/P ratio of bellow 0.50 (39.75%) showed a significant level of antibody. A 100% correlation was observed between high levels of the anti-Neospora antibody and Neospora DNA in the serum of water buffalo, and the whole N. caninum tachyzoites have the potency to be used as antigens for detection of the parasite in ELISA.
Collapse
Affiliation(s)
- Hossein Rezvan
- Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamadan, Iran
| | - Amir Khaki
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Amol University of Special Modern Technologies, Amol, Iran
| | | | - Roya Abedizadeh
- PhD Candidate, Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamadan, Iran
| |
Collapse
|
18
|
Coelho AM, Cherubini G, De Stefani A, Negrin A, Gutierrez-Quintana R, Bersan E, Guevar J. Serological prevalence of toxoplasmosis and neosporosis in dogs diagnosed with suspected meningoencephalitis in the UK. J Small Anim Pract 2018; 60:44-50. [PMID: 30371939 DOI: 10.1111/jsap.12937] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 07/24/2018] [Accepted: 08/30/2018] [Indexed: 12/18/2022]
Abstract
OBJECTIVES To assess the prevalence of antibodies to Toxoplasma gondii and Neospora caninum in a population of dogs with a diagnosis of suspected inflammatory meningoencephalitis. MATERIALS AND METHODS Medical records of three referral centres were reviewed from 2008 to 2016 to identify a cohort of dogs diagnosed and treated for suspected inflammatory meningoencephalitis after testing for evidence of exposure to these pathogens. RESULTS In our sample of 400 dogs the prevalence for exposure (IgG>1:50) to Toxoplasma gondii was 8/201 (3∙98%). Active infection (IgG titre >1:400 or/and an IgM titre >1:64 and/or positive PCR in CSF) was suspected in 1/400 (0∙25%). The prevalence for exposure [Indirect fluorescent antibody (IFA) titre >1:50] and active infection (IFA titres ≥⃒1:400 and/or positive PCR in CSF) with Neospora caninum were 14/201 (6∙96%) and 9/400 (2∙25%), respectively. CLINICAL SIGNIFICANCE In view of the low prevalence of protozoan infections, the risk associated with starting immunosuppressive medication in dogs with evidence of inflammatory meningitis or encephalitis in the UK appears low.
Collapse
Affiliation(s)
- A M Coelho
- Dick White Referrals (DWR), Veterinary Specialist Centre, Cambridge CB8 0UH, UK
| | - G Cherubini
- Dick White Referrals (DWR), Veterinary Specialist Centre, Cambridge CB8 0UH, UK
| | - A De Stefani
- Dick White Referrals (DWR), Veterinary Specialist Centre, Cambridge CB8 0UH, UK
| | - A Negrin
- Dick White Referrals (DWR), Veterinary Specialist Centre, Cambridge CB8 0UH, UK
| | - R Gutierrez-Quintana
- College of Medicine, Veterinary and Life Sciences, School of Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
| | - E Bersan
- School of Veterinary Science, Small Animal Teaching Hospital, University of Liverpool, CH64 7TE, Neston, Cheshire, UK
| | - J Guevar
- School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| |
Collapse
|
19
|
Schmidt AC, Pacheco TDA, Barddal JEI, Oliveira ACSD, Aguiar DMD, Negreiros RL, Pacheco RDC. Seroprevalence, spatial analysis and risk factors of infection with Neospora caninum in cattle in Brazil's northern Pantanal wetland. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2018; 27:455-463. [PMID: 30184003 DOI: 10.1590/s1984-296120180058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 07/10/2018] [Indexed: 11/22/2022]
Abstract
Neosporosis is caused by an obligate intracellular protozoan, Neospora caninum . It is considered one of the most widespread and frequent causes of abortion in cattle worldwide. To evaluate the prevalence of anti-N. caninum antibodies and associated risk factors, serum samples were collected from 2,452 bovines at 262 farms in the northern Pantanal, state of Mato Grosso, Brazil. Each farmer was asked to fill out a questionnaire for subsequent epidemiological data analysis. Anti-N. caninum antibodies were detected by means of the indirect immunofluorescent assay (IFA), using a cut-off dilution of 1:100. The overall anti-N. caninum antibodies prevalence was 25.44% (Confidence Interval - CI 95%; 20.10%; 30.78%), and the anti-N. caninum antibodies prevalence per herd was 76.72% (CI 95%; 71.60%; 81.84%). The presence of dogs, occurrence of abortion in cows, and sale of cattle for breeding were statistically associated with seropositivity in herds, while the risk of females being seropositive for N. caninum was higher in animals ≤ 6-years-old and in the presence of dogs. A spatial analysis indicated that the relative risk of the disease is spatially constant and that the farms with the highest prevalence of anti-N. caninum antibodies are located south of the region under study.
Collapse
Affiliation(s)
- Ana Carolina Schmidt
- Programa de Pós-graduação em Ciências Veterinárias - PPGVET, Faculdade de Medicina Veterinária - FAVET, Universidade Federal de Mato Grosso - UFMT, Cuiabá, MT, Brasil.,Instituto de Defesa Agropecuária do Estado de Mato Grosso - INDEA-MT, Cuiabá, MT, Brasil
| | - Thábata Dos Anjos Pacheco
- Programa de Pós-graduação em Ciências Veterinárias - PPGVET, Faculdade de Medicina Veterinária - FAVET, Universidade Federal de Mato Grosso - UFMT, Cuiabá, MT, Brasil.,Instituto Federal de Rondônia - IFRO, Cacoal, RO, Brasil
| | - Janice Elena Ioris Barddal
- Programa de Pós-graduação em Ciências Veterinárias - PPGVET, Faculdade de Medicina Veterinária - FAVET, Universidade Federal de Mato Grosso - UFMT, Cuiabá, MT, Brasil.,Ministério da Agricultura, Pecuária e Abastecimento - MAPA, Cuiabá, MT, Brasil
| | - Anderson Castro Soares de Oliveira
- Programa de Pós-graduação em Ciências Veterinárias - PPGVET, Faculdade de Medicina Veterinária - FAVET, Universidade Federal de Mato Grosso - UFMT, Cuiabá, MT, Brasil
| | - Daniel Moura de Aguiar
- Programa de Pós-graduação em Ciências Veterinárias - PPGVET, Faculdade de Medicina Veterinária - FAVET, Universidade Federal de Mato Grosso - UFMT, Cuiabá, MT, Brasil
| | - Rísia Lopes Negreiros
- Instituto de Defesa Agropecuária do Estado de Mato Grosso - INDEA-MT, Cuiabá, MT, Brasil
| | - Richard de Campos Pacheco
- Programa de Pós-graduação em Ciências Veterinárias - PPGVET, Faculdade de Medicina Veterinária - FAVET, Universidade Federal de Mato Grosso - UFMT, Cuiabá, MT, Brasil
| |
Collapse
|
20
|
EKŞİ F, DEMİR P, BABÜR C, ÜTÜK AE. Türkiye’nin Adana Yöresindeki Koyunlarda Toxoplasma gondii ve Neospora caninum Seroprevalansının Araştırılması. ACTA ACUST UNITED AC 2018. [DOI: 10.35864/evmd.512899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
21
|
Galvão CMMDQ, Rezende-Gondim MM, Chaves ACR, Schares G, Ribas JRL, Gondim LFP. Brazilian donkeys (Equus asinus) have a low exposure to Neospora spp. ACTA ACUST UNITED AC 2017; 24:340-4. [PMID: 26444065 DOI: 10.1590/s1984-29612015057] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Donkeys (Equus asinus) are closely related to horses and are known to be infected by several equine pathogens. Neospora caninum and Neospora hughesi are protozoan parasites that infect horses, but they were not confirmed in donkeys up to this date. The aim of this study was to evaluate the exposure of donkeys (Equus asinus) to Neospora spp. using tachyzoites of N. caninum as antigen and employing two common serologic methods, IFAT and immunoblot. Sera from 500 donkeys were obtained from 30 municipalities in Bahia state and tested by IFAT. Two of 500 sera were positive for Neospora spp. by IFAT with antibody titers of 100, and recognized a 37kDa antigen in immunoblot. Approximately 22% of the samples showed strong apical reactions and/or incomplete fluorescence, what may cause confusion in the interpretation of IFAT. We concluded that Neospora spp. are possibly of minor importance for Brazilian donkeys. Future studies are necessary to prove that Neospora spp. can naturally infect donkeys.
Collapse
Affiliation(s)
| | - Mariana Marrega Rezende-Gondim
- Departamento de Anatomia, Patologia e Clínicas, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Salvador, BA, BR
| | - Ana Carla Rodrigues Chaves
- Departamento de Anatomia, Patologia e Clínicas, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Salvador, BA, BR
| | - Gereon Schares
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Südufer, Greifswald-Insel Riems, DE
| | | | - Luís Fernando Pita Gondim
- Departamento de Anatomia, Patologia e Clínicas, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Salvador, BA, BR
| |
Collapse
|
22
|
Serological study of Neospora caninum in dogs and wildlife in a nature conservation area in southern Portugal. ACTA ACUST UNITED AC 2017. [DOI: 10.1017/pao.2017.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
SUMMARYA serological survey was performed to evaluate the presence of specific antibodies againstNeospora caninumin dogs and native animals in a wildlife conservation area in southern Portugal. The study involved 463 animals, including dogs (n = 286), European rabbits (Oryctolagus cuniculus;n = 32), Egyptian mongoose (Herpestes ichneumon;n = 34), wild boars (Sus scrofa;n = 26), foxes (Vulpes vulpes,n = 25), common genets (Genetta genetta;n = 17), red deer (Cervus elaphus;n = 14), wildcats (Felis silvestris;n = 6), four mustelid species (n = 17) and rodents (n = 6). Samples from dogs were analysed by Indirect Fluorescent Antibody Test (IFAT). Samples from wild animals were screened by the modified agglutination test and positive and doubtful results were confirmed by IFAT. The seroprevalence ofN. caninumin dogs was 32·5% [95% confidence interval (95% CI) 27·3–38·1]. Among wild animals, exposure toN. caninumwas confirmed only in foxes (12%, 95% CI 4·2–30) and rabbits (25%, 95% CI 13·3–42·1). This is the first evidence of natural exposure toN. caninumin foxes and rabbits in Portugal, and our results suggest that rabbits may play a role as reservoirs of infection to dogs, foxes and other wildlife carnivores. The relevance of this finding in the sylvatic cycle ofN. caninumneeds further studies, since infection may affect wildlife species and cattle grazing in the same areas.
Collapse
|
23
|
Paiz LM, da Silva RC, Menozzi BD, Langoni H. Antibodies to Neospora caninum in sheep from slaughterhouses in the state of São Paulo, Brazil. ACTA ACUST UNITED AC 2017; 24:95-100. [PMID: 25909261 DOI: 10.1590/s1984-29612015009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 12/01/2014] [Indexed: 11/21/2022]
Abstract
Neosporosis is an emergent disease responsible for considerable economic impact due to reproductive losses. Its zoonotic potential remains unknown. This study involved a survey of antibodies to Neospora caninum in slaughtered sheep and their association with epidemiological variables. Serum samples from 596 sheep from the states of São Paulo and Rio Grande do Sul, Brazil, were collected in two slaughterhouses located in São Paulo and evaluated by indirect fluorescence antibody test (IFAT), using cut-off titers of 25. Among these samples, 353/596 (59.23%; 95%CI 55.23-63.10) were positive and 263/353 (74.50%; 95%CI 69.71-78.77%) were from Rio Grande do Sul. Statistical associations were determined in the univariate analysis between the serological results and sex, breed and municipality of origin. Sheep that came from extensive breeding system showed higher chance (OR=2.09) of presenting antibodies to N. caninum in relation to those from semi-intensive system. Higher chance was also observed for the different studied breeds, except Bergamácia, in relation to Hampshire Down. The results revealed the presence of infection by N. caninum in sheep from slaughterhouses.
Collapse
Affiliation(s)
- Laís Moraes Paiz
- Departamento de Saúde Coletiva, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - Rodrigo Costa da Silva
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, USA
| | - Benedito Donizete Menozzi
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - Helio Langoni
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP, Brasil
| |
Collapse
|
24
|
Importance of serological cross-reactivity among Toxoplasma gondii, Hammondia spp., Neospora spp., Sarcocystis spp. and Besnoitia besnoiti. Parasitology 2017; 144:851-868. [PMID: 28241894 PMCID: PMC5471829 DOI: 10.1017/s0031182017000063] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Toxoplasma gondii, Neospora spp., Sarcocystis spp., Hammondia spp. and Besnoitia besnoiti are genetically related cyst-forming coccidia. Serology is frequently used for the identification of T. gondii, Neospora spp. and B. besnoiti-exposed individuals. Serologic cross-reactions occur in different tests among animals infected with T. gondii and H. hammondi, as well as among animals infected by T. gondii and N. caninum. Infections caused by N. caninum and N. hughesi are almost indistinguishable by serology. Neospora caninum, B. besnoiti and Sarcocystis spp. infections in cattle show some degree of serologic cross-reactivity. Antibody cross-reactivity between Neospora spp. and H. heydorni-infected animals is suspected, but not proven to occur. We review serologic cross-reactivity among animals and/or humans infected with T. gondii, Neospora spp., Sarcocystis spp., Hammondia spp. and B. besnoiti. Emphasis is laid upon antigens and serological methods for N. caninum diagnosis which were tested for cross-reactivity with related protozoa. Species-specific antigens, as well as stage-specific proteins have been identified in some of these parasites and have promising use for diagnosis and epidemiological surveys.
Collapse
|
25
|
Abstract
We tested serum samples from 387 free-ranging wolves ( Canis lupus ) from 2007 to 2013 for exposure to eight canid pathogens to establish baseline data on disease prevalence and spatial distribution in Minnesota's wolf population. We found high exposure to canine adenoviruses 1 and 2 (88% adults, 45% pups), canine parvovirus (82% adults, 24% pups), and Lyme disease (76% adults, 39% pups). Sixty-six percent of adults and 36% of pups exhibited exposure to the protozoan parasite Neospora caninum . Exposure to arboviruses was confirmed, including West Nile virus (37% adults, 18% pups) and eastern equine encephalitis (3% adults). Exposure rates were lower for canine distemper (19% adults, 5% pups) and heartworm (7% adults, 3% pups). Significant spatial trends were observed in wolves exposed to canine parvovirus and Lyme disease. Serologic data do not confirm clinical disease, but better understanding of disease ecology of wolves can provide valuable insight into wildlife population dynamics and improve management of these species.
Collapse
|
26
|
Ribeiro MJM, Rosa MHF, Bruhn FRP, Garcia ADM, Rocha CMBMD, Guimarães AM. Seroepidemiology of Sarcocystis neurona, Toxoplasma gondii and Neospora spp. among horses in the south of the state of Minas Gerais, Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2016; 25:142-50. [DOI: 10.1590/s1984-29612016029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 03/02/2016] [Indexed: 11/21/2022]
Abstract
Abstract The present study used the indirect fluorescent antibody test (IFAT) to determine the seroprevalence of Sarcocystis neurona, Toxoplasma gondii and Neospora spp., and evaluated the variables associated with these infections among 506 apparently healthy horses, reared in the south of the state of Minas Gerais, Brazil. This study was conducted between April 2012 and October 2013. Among the horses, the true prevalence of S. neurona was 26% (95% CI: 22.0-30.4%), T. gondii 19.9% (95% CI: 15.5-24.8%) and Neospora spp. 23.9% (95% CI: 19.9-28.1%); and among the farms, 88.3% (95% CI: 74.4-91.6%), 71.6% (95% CI: 41-92.8%) and 85% (95% CI: 70.7-96.1%), respectively. Regarding mixed infection, 17 horses (3.4%) were seropositive for both S. neurona and T. gondii, 16 (3.2%) for T. gondii and Neospora spp. and 14 (2.8%) for S. neurona and Neospora spp. The associations between seropositivity and variables relating to the structure of the farm, management and health were analyzed using the logistic regression analysis, through the generalized estimating equations (GEE). The results suggest that the south of Minas Gerais is an enzootic area for S. neurona, T. gondii and Neospora spp. among horses, with prevalence of asymptomatic subclinical or chronic infections.
Collapse
|
27
|
Silva RC, Machado GP. Canine neosporosis: perspectives on pathogenesis and management. VETERINARY MEDICINE-RESEARCH AND REPORTS 2016; 7:59-70. [PMID: 30050838 PMCID: PMC6055790 DOI: 10.2147/vmrr.s76969] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Canine neosporosis is a worldwide disease caused by the obligate intracellular parasite protozoan Neospora caninum, manifesting mainly neurological symptoms. N. caninum has a heteroxenous life cycle and affects a wide range of warm-blooded animals. The domestic and wild canids are the definitive host of the parasite. They shed oocysts after ingestion of tissue cysts from infected intermediate hosts (ovine, equine, bovine, canine, and many other species), containing bradyzoites, or oocyst-contaminated water and food. The presence of dogs in farms is considered a risk factor for production animals. A wide range of diagnostic methods are currently available, but the most used is serology, ie, indirect fluorescent antibody test specific to the antibody detection in blood serum samples. No vaccine is available, but control strategies should be focused on the vertical and horizontal transmission of the parasite, ie, avoid feeding dogs with raw or undercooked meat, and taking care with water for human and animal consumption. No medicines to control the transplacental transmission are available yet.
Collapse
Affiliation(s)
- Rodrigo C Silva
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Starkville, MS, USA,
| | - Gustavo P Machado
- Department of Internal Medicine and Surgery of Small Animals, Dr Munhoz Veterinary Hospital, Itápolis, Brazil
| |
Collapse
|
28
|
Oshiro LM, Motta-Castro ARC, Freitas SZ, Cunha RC, Dittrich RL, Meirelles ACF, Andreotti R. Neospora caninum and Toxoplasma gondii serodiagnosis in human immunodeficiency virus carriers. Rev Soc Bras Med Trop 2016; 48:568-72. [PMID: 26516966 DOI: 10.1590/0037-8682-0151-2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 07/23/2015] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Neospora caninum and Toxoplasma gondii belong to the Sarcocystidae family, and both have one definitive and various intermediary hosts. Owing to their weak immune systems, immunocompromised persons might be prone to opportunistic infections. The aim of this study was to investigate the presence of anti- N. caninum and anti- T. gondii antibodies in immunocompromised individuals. METHODS This cross-sectional study investigated the rates of N. caninum and T. gondii , as assessed using immunofluorescent antibody reaction (IFAT) with 1:50 and 1:16 dilution, respectively, in patients with human immunodeficiency virus (HIV). RESULTS The seropositivity for N. caninum was 26.1% (81/310) in Mato Grosso do Sul and 31.2% (10/32) in Paraná and for T. gondii was 76.8% (238/310) in Mato Grosso do Sul and 68.7% (22/32) in Paraná. CONCLUSIONS There is evidence of anti- N caninum and anti- T. gondii antibodies in patients with HIV. Other aspects of T. gondii , which is a zoonosis, and N. caninum , which might affect immunodeficient individuals, need to be evaluated and reported.
Collapse
Affiliation(s)
- Leandra Marla Oshiro
- Programa de Graduação em Doenças Infecciosas e Parasitárias, Universidade Federal de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - Solange Zacalusni Freitas
- Curso de Farmácia Bioquímica, Universidade Federal de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Rodrigo Casquero Cunha
- Departamento de Biotecnologia, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | | | | | - Renato Andreotti
- Laboratório de Biologia Molecular, Sanidade Animal, Embrapa Gado de Corte, Campo Grande, Mato Grosso do Sul, Brazil
| |
Collapse
|
29
|
Raimundo JM, Guimarães A, Moraes LMDB, Santos LA, Nepomuceno LL, Barbosa SM, Pires MS, Santos HA, Massard CL, Machado RZ, Baldani CD. Toxoplasma gondii and Neospora caninum in dogs from the state of Tocantins: serology and associated factors. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2015; 24:475-81. [DOI: 10.1590/s1984-29612015068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 04/06/2015] [Indexed: 11/22/2022]
Abstract
Abstract This study investigated occurrences of anti-Neospora caninum and anti-Toxoplasma gondii IgG antibodies by means of the enzyme-linked immunosorbent assay (ELISA) and indirect immunofluorescence assay (IFAT), along with risk factors associated with toxoplasmosis and neosporosis, in 204 dogs from urban and rural areas of the municipality of Araguaína, state of Tocantins, Brazil. One hundred and thirty samples (63.7%) were positive for T. gondii using ELISA: 57.1% and 70.7% in the urban and rural areas, respectively. The seropositivity frequency for T. gondii observed through IFAT was 57.4%, distributed between rural and urban areas as 62.6% and 52.4%, respectively. The factors associated with canine toxoplasmosis were age and breed (p<0.05). In relation to N. caninum, 88 samples (43.1%) were positive, according to ELISA, distributed as 42.9% in urban areas and 43.3% in rural areas. Anti - N. caninum antibodies were detected through IFAT in 62 dogs (30.4%), distributed as 31.3% and 29.5% between rural and urban areas, respectively. Age and breed were associated with neosporosis occurrence (p<0.05) by IFAT. This study provides the first detection of IgG antibodies for canine toxoplasmosis and neosporosis in the state of Tocantins and highlights the importance of dogs in the epidemiological chain of these diseases.
Collapse
|
30
|
Ichikawa-Seki M, Guswanto A, Allamanda P, Mariamah ES, Wibowo PE, Nishikawa Y. Seroprevalence of antibody to NcSAG1 antigen of Neospora caninum in cattle from Western Java, Indonesia. J Vet Med Sci 2015; 78:121-3. [PMID: 26256492 PMCID: PMC4751129 DOI: 10.1292/jvms.15-0382] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Neospora caninum can cause fetal abortion and neonatal mortality in cattle, and is a cause of economic concern worldwide. This study aimed to determine the prevalence of Neospora caninum-specific antibodies in cattle from Western Java, Indonesia. Serum samples from 991 cattle from 21 locations were tested for antibodies to N. caninum by using an enzyme-linked immunosorbent assay (ELISA) on the basis of recombinant NcSAG1. The overall seroprevalence was 16.6%, ranging from 0 to 87.5% in the sampled locations. The results of this study indicate latent infection rates of sampled animals were different in each location. Further studies are necessary to elucidate the relationship between N. caninum infection and abortion in cattle, and to identify risk factors for infection in high-prevalence environments.
Collapse
Affiliation(s)
- Madoka Ichikawa-Seki
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka 020-8550, Japan
| | | | | | | | | | | |
Collapse
|
31
|
Syed-Hussain SS, Howe L, Pomroy WE, West DM, Smith SL, Williamson NB. Adaptation of a commercial ELISA to determine the IgG avidity in sheep experimentally and naturally infected with Neospora caninum. Vet Parasitol 2014; 203:21-8. [PMID: 24582279 DOI: 10.1016/j.vetpar.2014.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 01/07/2014] [Accepted: 01/07/2014] [Indexed: 10/25/2022]
Abstract
Recent reports indicate Neospora caninum has a possible role in causing abortions in sheep in New Zealand. Knowledge about the epidemiology of neosporosis in sheep is limited. This study aimed to adapt and validate a commercially available ELISA assay as an IgG avidity assay to discriminate between acute (primary and re-inoculated) and chronic N. caninum infections in sheep. In addition, it was used to compare the antibody avidity values between lambs from ewes inoculated with N. caninum either during the pregnancy or in the previous year. The avidity assay was undertaken by using 6M urea for the first wash after incubation with the primary antibody in the commercial ELISA (Chekit* Neospora antibody test kit, IDEXX Laboratories, Australia). Sequential serum samples were obtained from naïve ewes (n=16) experimentally inoculated with live N. caninum tachyzoites. All ewes were seropositive by two weeks post-inoculation and remained seropositive for 20 weeks post-inoculation. There was a linear relationship between time after inoculation and avidity values (p<0.05) over the first 24 weeks. In Week 4, all animals had avidity values <35% and by Week 8, 8/16 animals had avidity values of >35%. These results suggest that an avidity value of <35% indicates a recent primary infection while a value of >35% is indicative of a chronic infection. The assay was then validated using samples from other groups of experimentally inoculated sheep as well as samples from naturally infected ewes. When comparing sample to positive ratio (S/P) and avidity values from lambs born from recently inoculated ewes with those from ewes inoculated the previous year and re-inoculated in the current year, it was possible to differentiate the lambs at 2 weeks of age. Lambs from recently inoculated ewes had low S/P and avidity values at 2 weeks of age which increased by 12 weeks of age. In comparison, lambs from re-inoculated ewes had high S/P and avidity values at 2 weeks of age, due to maternal antibody influence but values were similar to those from lambs that were born from recently inoculated ewes at 12 weeks of age. Avidity values for four naturally infected ewes were all >60% indicating chronic infection. These results suggest that the assay is able to discriminate between recent and chronic infection in sheep as well as able to differentiate lambs with maternal immunity compared to their own de novo immunity. As such it can be utilized to understand the kinetics of N. caninum infection in sheep.
Collapse
Affiliation(s)
- S S Syed-Hussain
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North 4412, New Zealand
| | - L Howe
- Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North 4412, New Zealand
| | - W E Pomroy
- Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North 4412, New Zealand.
| | - D M West
- Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North 4412, New Zealand
| | - S L Smith
- Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North 4412, New Zealand
| | - N B Williamson
- Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North 4412, New Zealand
| |
Collapse
|
32
|
Moura ABD, Silva MOD, Farias JA, Vieira-Neto A, Souza APD, Sartor AA, Fonteque JH, Bunn S. Neospora spp. antibodies in horses from two geographical regions of the state of Santa Catarina, Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2013; 22:597-601. [DOI: 10.1590/s1984-29612013000400023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 09/16/2013] [Indexed: 11/21/2022]
Abstract
The aims of this study were to determine occurrences ofNeospora spp. IgG antibodies in horses from two geographical regions of the state of Santa Catarina, southern Brazil, and identify risk factors for infection. Analyses were performed on 615 samples using the immunofluorescent antibody test (IFAT ≥ 1:50). Out of the 615 samples, 25 (4.1%) were positive for Neospora spp. The titers for Neospora spp. were distributed as follows: 1:50 (13), 1:100 (eight), 1:200 (three) and 1:400 (one). Out of the 311 samples taken in the mountain region, eight were positive (2.6%). Among the samples from the coastal region (304), 17 had Neospora spp. antibodies, thus indicating occurrence of 5.6%. Although no statistically significant difference was observed (P = 0.06704), the prevalence among animals of the coast was 2.2 times higher than that of the mountain region. Contact with dogs and/or cattle (P = 0.007596) were identified as risk factor forNeospora spp. infection.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Silvério Bunn
- Universidade do Estado de Santa Catarina - UDESC, Brasil
| |
Collapse
|
33
|
Alvarez-García G, García-Culebras A, Gutiérrez-Expósito D, Navarro-Lozano V, Pastor-Fernández I, Ortega-Mora LM. Serological diagnosis of bovine neosporosis: A comparative study of commercially available ELISA tests. Vet Parasitol 2013; 198:85-95. [DOI: 10.1016/j.vetpar.2013.07.033] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 07/17/2013] [Accepted: 07/22/2013] [Indexed: 10/26/2022]
|
34
|
Macêdo AG, Cunha JP, Cardoso THS, Silva MV, Santiago FM, Silva JS, Pirovani CP, Silva DAO, Mineo JR, Mineo TWP. SAG2A protein from Toxoplasma gondii interacts with both innate and adaptive immune compartments of infected hosts. Parasit Vectors 2013; 6:163. [PMID: 23735002 PMCID: PMC3706231 DOI: 10.1186/1756-3305-6-163] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Accepted: 05/26/2013] [Indexed: 11/26/2022] Open
Abstract
Background Toxoplasma gondii is an intracellular parasite that causes relevant clinical disease in humans and animals. Several studies have been performed in order to understand the interactions between proteins of the parasite and host cells. SAG2A is a 22 kDa protein that is mainly found in the surface of tachyzoites. In the present work, our aim was to correlate the predicted three-dimensional structure of this protein with the immune system of infected hosts. Methods To accomplish our goals, we performed in silico analysis of the amino acid sequence of SAG2A, correlating the predictions with in vitro stimulation of antigen presenting cells and serological assays. Results Structure modeling predicts that SAG2A protein possesses an unfolded C-terminal end, which varies its conformation within distinct strain types of T. gondii. This structure within the protein shelters a known B-cell immunodominant epitope, which presents low identity with its closest phyllogenetically related protein, an orthologue predicted in Neospora caninum. In agreement with the in silico observations, sera of known T. gondii infected mice and goats recognized recombinant SAG2A, whereas no serological cross-reactivity was observed with samples from N. caninum animals. Additionally, the C-terminal end of the protein was able to down-modulate pro-inflammatory responses of activated macrophages and dendritic cells. Conclusions Altogether, we demonstrate herein that recombinant SAG2A protein from T. gondii is immunologically relevant in the host-parasite interface and may be targeted in therapeutic and diagnostic procedures designed against the infection.
Collapse
Affiliation(s)
- Arlindo G Macêdo
- Laboratório de Imunoparasitologia "Dr, Mário Endsfeldz Camargo", Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Av, Pará 1720-Bloco 4C, Campus Umuarama, Uberlândia, Minas Gerais 38.400-902, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Neospora caninum NC-6 Argentina induces fetopathy in both serologically positive and negative experimentally inoculated pregnant dams. Parasitol Res 2013; 112:2585-92. [DOI: 10.1007/s00436-013-3424-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 04/04/2013] [Indexed: 10/26/2022]
|
36
|
Selahi F, Namavari M, Hosseini MH, Mansourian M, Tahamtan Y. Development of a disperse dye immunoassay technique for detection of antibodies against Neospora caninum in cattle. THE KOREAN JOURNAL OF PARASITOLOGY 2013; 51:129-32. [PMID: 23467930 PMCID: PMC3587742 DOI: 10.3347/kjp.2013.51.1.129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 10/02/2012] [Accepted: 10/04/2012] [Indexed: 11/23/2022]
Abstract
In this study a disperse dye immunoassay method was standardized and evaluated for detection of antibodies against Neospora caninum in cattle. Sera from 150 cattle with a recent history of abortion were collected and tested by commercial ELISA kit and a standardized in-house dye immunoassay system. The positivity rate for the sera used in this study was 34.6% for the disperse dye immunoassay (DDIA) compared to 32% obtained by ELISA kit. This study showed no significant difference between DDIA and ELISA. The results indicated that the DDIA provide an economic, simple, rapid and robust test for detection of N. caninum infection in cattle.
Collapse
|
37
|
Neospora caninum in Estonian dairy herds in relation to herd size, reproduction parameters, bovine virus diarrhoea virus, and bovine herpes virus 1. Vet Parasitol 2012; 190:43-50. [DOI: 10.1016/j.vetpar.2012.05.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 05/17/2012] [Accepted: 05/18/2012] [Indexed: 01/27/2023]
|
38
|
Talafha AQ, Al-Majali AM. Prevalence and risk factors associated with Neospora caninum infection in dairy herds in Jordan. Trop Anim Health Prod 2012; 45:479-85. [PMID: 22869339 DOI: 10.1007/s11250-012-0244-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2012] [Indexed: 11/29/2022]
Abstract
A cross-sectional study was carried out to determine the seroprevalence and to identify risk factors associated with Neospora caninum infection in 62 dairy herds (n = 671 cows) in Jordan between January and June 2007. Information regarding herd management was recorded through personal interviews with farmers. Antibodies against N. caninum were detected using an indirect ELISA test. Chi-square analysis and multivariable logistic regression model were used to identify risk factors associated with N. caninum seropositivity. The true prevalence of antibodies against N. caninum in individual cows and cattle herds was 35 and 66.5 %, respectively. There was no significant difference in the percentage of seropositive animals between different age groups. Multivariable logistic regression model revealed workers frequently visiting nearby farms as a risk factor for seropositivity to N. caninum, while presence of a calving pen was suggested as a protective factor. Amman, Balqa, and Mafrak governorates had significantly lower seroprevalence to N. caninum compared to other Jordanian governorates. Results of this study indicated that N. caninum infection may be widespread in Jordan.
Collapse
Affiliation(s)
- Abdelsalam Q Talafha
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan.
| | | |
Collapse
|
39
|
Neospora caninum infection dynamics in dairy cattle. Parasitol Res 2012; 111:717-21. [PMID: 22581344 DOI: 10.1007/s00436-012-2891-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Accepted: 03/06/2012] [Indexed: 10/28/2022]
Abstract
Neospora caninum is considered in many countries as one of the key abortion agents in cattle. This study aims to investigate the parasite behavior in dairy cattle in the municipality of Avaré, SP, Brazil, where abortions frequently occur. An ELISA was performed to compare two samplings on a total of 615 animals; tests were performed in the same herds with a gap of 3 years. An increase in the percentage of reactive animals was observed, ranging from 21.6% at the first sampling to 38.9% at the second sampling. Of the 176 animals tested at both samplings, 61.93% retained a non-reactive status, 15.9% retained a reactive status, 19.88% switched from non-reactive to reactive and 2.27% switched from reactive to non-reactive. Of the 100 animals with reproductive disturbances, 50% presented anti-Neospora antibodies, thereby indicating the presence of the protozoa. When comparing cows and their respective female offspring, a predominance of horizontal infection was observed. Moreover, considering the significant percentage of animals that switched from non-reactive to reactive and the abundant presence of dogs among the herds, the N. caninum transmission may be attributed to presence of carnivores.
Collapse
|
40
|
Moraveji M, Hosseini A, Moghaddar N, Namavari MM, Eskandari MH. Development of latex agglutination test with recombinant NcSAG1 for the rapid detection of antibodies to Neospora caninum in cattle. Vet Parasitol 2012; 189:211-7. [PMID: 22571832 DOI: 10.1016/j.vetpar.2012.04.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 04/10/2012] [Accepted: 04/11/2012] [Indexed: 10/28/2022]
Abstract
Neospora caninum, an apicomplexan protozoan parasite, is recognized as a major cause of abortion in cattle. Surface antigen 1 of N. caninum (NcSAG1) is an important immunodominant candidate for the development of a diagnostic reagent for neosporosis. The present study describes the development and evaluation of a latex agglutination test (LAT) with recombinant NcSAG1 (rNcSAG1) for the detection of antibodies to N. caninum in cattle. The rNcSAG1 gene was cloned in pET-28a and protein was expressed in Escherichia coli BL21 (DE3). Carboxylated latex particles were coated with rNcSAG1 and the degree of agreement between LAT and a commercial enzyme-linked immunosorbent assay (iscomELISA) was evaluated by using of 164 serum samples. Twenty-two (13.4%) and 23 (14.0%) of samples were positive for antibodies to N. caninum by LAT and ELISA respectively. Eighteen of 23 ELISA-positive samples were positive according to the LAT and a substantial agreement (κ=0.77) was found between the results of LAT and ELISA. The results indicated that the LAT with rNcSAG1 would be a rapid, simple, relatively inexpensive and suitable diagnostic test for detection of specific antibodies in N. caninum infection under field conditions. Improvement in purification of rNcSAG1 can reduce probable false positive reactions and so increase the degree of agreement between the LAT and ELISA.
Collapse
Affiliation(s)
- Marjan Moraveji
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | | | | | | | | |
Collapse
|
41
|
Weston J, Heuer C, Williamson N. Efficacy of a Neospora caninum killed tachyzoite vaccine in preventing abortion and vertical transmission in dairy cattle. Prev Vet Med 2012; 103:136-44. [DOI: 10.1016/j.prevetmed.2011.08.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2010] [Revised: 08/25/2011] [Accepted: 08/25/2011] [Indexed: 11/16/2022]
|
42
|
Moraes LMDB, Raimundo JM, Guimarães A, Santos HA, Macedo Junior GDL, Massard CL, Machado RZ, Baldani CD. Occurrence of anti-Neospora caninum and anti-Toxoplasma gondii IgG antibodies in goats and sheep in western Maranhão, Brazil. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2011; 20:312-7. [DOI: 10.1590/s1984-29612011000400010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 07/27/2011] [Indexed: 11/21/2022]
Abstract
Neosporosis and toxoplasmosis are parasitic diseases which can cause reproductive problems in goats and sheep. The current study aimed to determine the occurrence of anti-Neospora caninum and anti-Toxoplasma gondii IgG antibodies in goats and sheep from the districts of Amarante do Maranhão and Buritirana, Imperatriz microregion, western area of Maranhão State, northeastern Brazil, and to assess factors associated to infection by these etiologic agents. Blood samples from 110 animals (46 goats and 64 sheep) from five herds were collected, and indirect immunofluorescence assay was used for serological testing. Of 46 goat samples, 17.39% (n = 8) showed anti-N. caninum antibodies and 4.35% (n = 2) anti-T. gondii, while of 64 sheep samples 4.69% (n = 3) and 18.75% (n = 12) showed anti-N. caninum and anti-T. gondii antibodies, respectively. No significant difference regarding the presence of domestic cats and/or dogs on the property and veterinary care was seen for both etiologic agents studied. However, food supplementation and animal reproductive failure were significantly (p < 0.05) for N. caninum among sheep and goats, respectively. The current study showed that goats and sheep in western Maranhão are exposed to N. caninum and T. gondii. It is the first evidence of these agents in small ruminants in this region.
Collapse
|
43
|
Machado GP, Kikuti M, Langoni H, Paes AC. Seroprevalence and risk factors associated with neosporosis in sheep and dogs from farms. Vet Parasitol 2011; 182:356-8. [PMID: 21676548 DOI: 10.1016/j.vetpar.2011.05.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 05/16/2011] [Accepted: 05/17/2011] [Indexed: 10/18/2022]
Abstract
This study aimed to establish the seroprevalence and risk factors associated with neosporosis in sheep and dogs from rural properties. 1497 blood samples were collected from sheep and 42 from dogs that cohabited with sheep from 16 farms located in the central region of São Paulo State, Brazil. For the detection of N. caninum antibodies it was performed the indirect fluorescent antibody test (IFAT ≥ 25). For the epidemiological study it was applied a questionnaire for the owners or responsible from the sheep and dogs regarding informations related to neosporosis. The seroprevalence obtained out of the 1497 sheep sera tested was 8.0% (CI95%=6.7-9.2%) and out of the 42 dogs 4.8% (CI95%=0-7.2%). Variables statistically related to seropositivity for N. caninum in sheep were: dams well as water supply (P=0.0004; OR=2.15), presence of other domestic canids (P=0.0013; OR=2.38) and presence of reproductive problems (P=0.0031; OR=1.75).
Collapse
Affiliation(s)
- Gustavo Puglia Machado
- Department of Veterinary Hygiene and Public Health, School of Veterinary Medicine and Animal Science, São Paulo State University, 18618-000 Botucatu, SP, Brazil.
| | | | | | | |
Collapse
|
44
|
Borsuk S, Andreotti R, Leite FPL, da Silva Pinto L, Simionatto S, Hartleben CP, Goetze M, Oshiro LM, Matos MDFC, Berne MEA. Development of an indirect ELISA-NcSRS2 for detection of Neospora caninum antibodies in cattle. Vet Parasitol 2011; 177:33-8. [DOI: 10.1016/j.vetpar.2010.11.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Revised: 11/11/2010] [Accepted: 11/15/2010] [Indexed: 11/24/2022]
|
45
|
Rossi GF, Cabral DD, Ribeiro DP, Pajuaba ACAM, Corrêa RR, Moreira RQ, Mineo TWP, Mineo JR, Silva DAO. Evaluation of Toxoplasma gondii and Neospora caninum infections in sheep from Uberlândia, Minas Gerais State, Brazil, by different serological methods. Vet Parasitol 2010; 175:252-9. [PMID: 21075529 DOI: 10.1016/j.vetpar.2010.10.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2010] [Revised: 08/30/2010] [Accepted: 10/11/2010] [Indexed: 11/17/2022]
Abstract
Toxoplasmosis and neosporosis have been recognized as economically important diseases with considerable impact on the livestock industry. Considering the scarce information on the occurrence of Toxoplasma gondii and Neospora caninum infections in sheep from Uberlândia, Minas Gerais State, Brazil, this study aimed to investigate the frequency of antibodies against these parasites in sheep sera from this region by using different serological methods. A total of 155 sheep serum samples were analyzed by the indirect fluorescence antibody test (IFAT) and enzyme-linked immunosorbent assay (ELISA) for the detection of IgG against T. gondii and N. caninum. Seroreactivity by IFAT showed 80% of samples with titers between 512 and 2048 for T. gondii (cutoff ≥ 64) and 78% presenting titers between 50 and 200 for N. caninum (cutoff ≥ 50). Seroreactivity by ELISA showed 75% of samples with ELISA index (EI) between 2.0 and 3.0 for T. gondii (cutoff ≥ 1.3) and 54% presenting EI between 1.3 and 2.0 for N. caninum (cut off ≥ 1.3). Discordant results by both tests were analyzed by immunoblot, resulting in a total seropositivity of 61% for T. gondii and 23% for N. caninum, with 41% to T. gondii only, 3% to N. caninum only, and 20% to both parasites. There was a significant positive association between seropositivity to T. gondii and age over one year (P<0.001), but such association was not found for N. caninum infection. In conclusion, as T. gondii and N. caninum infections are simultaneously present in sheep flocks of this region, it should be emphasized the importance to carry out a regular monitoring of Toxoplasma infection due to its high prevalence, its zoonotic potential and induction of reproductive disorders leading to economic losses. For neosporosis, sheep farmers should be instructed about the presence of the parasite in the flock, its risk factors and potential abortifacient role in sheep. Differential flock management could be valuable tool to establish the association of serological positivity and reproductive disease induced by N. caninum in sheep.
Collapse
Affiliation(s)
- G F Rossi
- Laboratório de Imunoparasitologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Av. Pará 1720, 38400-902 Uberlândia, MG, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Hosseininejad M, Hosseini F, Mosharraf M, Shahbaz S, Mahzounieh M, Schares G. Development of an indirect ELISA test using an affinity purified surface antigen (P38) for sero-diagnosis of canine Neospora caninum infection. Vet Parasitol 2010; 171:337-42. [DOI: 10.1016/j.vetpar.2010.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 03/26/2010] [Accepted: 04/01/2010] [Indexed: 11/25/2022]
|
47
|
Hosseininejad M, Azizi H, Hosseini F, Schares G. Development of an indirect ELISA test using a purified tachyzoite surface antigen SAG1 for sero-diagnosis of canine Toxoplasma gondii infection. Vet Parasitol 2009; 164:315-9. [DOI: 10.1016/j.vetpar.2009.05.029] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Revised: 05/22/2009] [Accepted: 05/27/2009] [Indexed: 10/20/2022]
|
48
|
Almberg ES, Mech LD, Smith DW, Sheldon JW, Crabtree RL. A serological survey of infectious disease in Yellowstone National Park's canid community. PLoS One 2009; 4:e7042. [PMID: 19756151 PMCID: PMC2738425 DOI: 10.1371/journal.pone.0007042] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Accepted: 08/19/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Gray wolves (Canis lupus) were reintroduced into Yellowstone National Park (YNP) after a >70 year absence, and as part of recovery efforts, the population has been closely monitored. In 1999 and 2005, pup survival was significantly reduced, suggestive of disease outbreaks. METHODOLOGY/PRINCIPAL FINDINGS We analyzed sympatric wolf, coyote (Canis latrans), and red fox (Vulpes vulpes) serologic data from YNP, spanning 1991-2007, to identify long-term patterns of pathogen exposure, identify associated risk factors, and examine evidence for disease-induced mortality among wolves for which there were survival data. We found high, constant exposure to canine parvovirus (wolf seroprevalence: 100%; coyote: 94%), canine adenovirus-1 (wolf pups [0.5-0.9 yr]: 91%, adults [>or=1 yr]: 96%; coyote juveniles [0.5-1.5 yrs]: 18%, adults [>or=1.6 yrs]: 83%), and canine herpesvirus (wolf: 87%; coyote juveniles: 23%, young adults [1.6-4.9 yrs]: 51%, old adults [>or=5 yrs]: 87%) suggesting that these pathogens were enzootic within YNP wolves and coyotes. An average of 50% of wolves exhibited exposure to the protozoan parasite, Neospora caninum, although individuals' odds of exposure tended to increase with age and was temporally variable. Wolf, coyote, and fox exposure to canine distemper virus (CDV) was temporally variable, with evidence for distinct multi-host outbreaks in 1999 and 2005, and perhaps a smaller, isolated outbreak among wolves in the interior of YNP in 2002. The years of high wolf-pup mortality in 1999 and 2005 in the northern region of the park were correlated with peaks in CDV seroprevalence, suggesting that CDV contributed to the observed mortality. CONCLUSIONS/SIGNIFICANCE Of the pathogens we examined, none appear to jeopardize the long-term population of canids in YNP. However, CDV appears capable of causing short-term population declines. Additional information on how and where CDV is maintained and the frequency with which future epizootics might be expected might be useful for future management of the Northern Rocky Mountain wolf population.
Collapse
Affiliation(s)
- Emily S Almberg
- Department of Natural Resources, Science, and Management, University of Minnesota, St. Paul, Minnesota, USA.
| | | | | | | | | |
Collapse
|
49
|
Ghalmi F, China B, Kaidi R, Losson B. First epidemiological study on exposure to Neospora caninum in different canine populations in the Algiers District (Algeria). Parasitol Int 2009; 58:444-50. [PMID: 19723590 DOI: 10.1016/j.parint.2009.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 08/21/2009] [Accepted: 08/24/2009] [Indexed: 11/15/2022]
Abstract
Neospora caninum is an important cause of abortion in cattle worldwide. Dogs act as final hosts shedding oocysts in the environment. They can also harbour the extraintestinal stage of the parasite and this may be associated with a fairly rare neuromuscular condition. The sera of 781 dogs from the Algiers District were screened by IFAT for the presence of anti-N. caninum antibodies. These dogs were distributed into four populations: local stray dogs, police dogs, dogs from breeding kennels and farm dogs. The overall seroprevalence was 21.90%. Significant differences were observed between the different populations, the highest prevalence being observed in farm (44.44%) and stray dogs (22.55%). Additionally, the highest titres were observed in farm dogs. Among studied epidemiological parameters, breed, dog origin, season and vaccination status were significantly associated with IFAT results. Additionally, a recently described real time PCR was used on the blood of 100 pound dogs and the results were compared with the serological data. A higher proportion of dogs was found to be positive by PCR when compared to the IFAT results. There was only a fairly low agreement between PCR and IFAT results which suggests that these techniques measured different aspects of the host-parasite relationship. This study indicates that the level of exposure of the canine population of Algiers area to N. caninum is very high. This would indicate a potentially high risk for N. caninum induced abortion in cattle in this region and in Algeria.
Collapse
Affiliation(s)
- F Ghalmi
- University of Liege, Faculty of Veterinary Medicine, Department of Infectious Diseases, Liège, Belgium
| | | | | | | |
Collapse
|
50
|
Ghalmi F, China B, Kaidi R, Losson B. Evaluation of a SRS2 Sandwich Commercial Enzyme-Linked Immunosorbent Assay for the Detection of Anti-Neospora Caninum Antibodies in Bovine and Canine Sera. J Vet Diagn Invest 2009; 21:108-11. [DOI: 10.1177/104063870902100116] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Neospora caninum is a parasite responsible for abortion in cows and neuromuscular disease in dogs. Serology is the most widely used technique to evaluate the prevalenceof N. caninum in different host populations. A sandwich enzyme-linked immunosorbent assay (ELISA) based on the use of an anti-SRS2 monoclonal antibody was evaluated against the indirect fluorescent antibody test for 100 canine sera and against a well-characterized ELISA for 102 bovine sera. In cattle sera, the relative sensitivity and relative specificity were 100%. In dog sera, the relative specificity and relative sensitivity were 94% and 86%, respectively. The kappa value was 1 for bovine sera and 0.77 for canine sera. The seroprevalence was 3.9% in bovine sera and 21–23% in canine sera. The SRS2 sandwich ELISA was considered a valuable tool in both species.
Collapse
Affiliation(s)
- Farida Ghalmi
- From the University of Liege, Faculty of Veterinary Medicine, Infectious and Parasitic Diseases Department, Laboratory of Parasitology, Liège, Belgium
- the National Veterinary School of Algiers, Algiers, Algeria
| | - Bernard China
- the Scientific Institute of Public Health, Clinical Biology, Brussels, Belgium
| | - Rachid Kaidi
- the University Saad Dahlab of Blida, Veterinary Sciences Department, Blida, Algeria
| | - Bertrand Losson
- From the University of Liege, Faculty of Veterinary Medicine, Infectious and Parasitic Diseases Department, Laboratory of Parasitology, Liège, Belgium
| |
Collapse
|