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Mortari APG, Tagarra LG, de Souza ML, Roman IJ, Ratzlaff FR, Braunig P, de Andrade CM, Cargnelutti JF, Sangioni LA, Vogel FSF. Increased seroprevalence of anti-Toxoplasma gondii antibodies in dogs in southern Brazil after an outbreak of human toxoplasmosis. Parasitol Res 2023; 122:1009-1014. [PMID: 36881160 DOI: 10.1007/s00436-023-07808-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023]
Abstract
Toxoplasmosis is a worldwide disease caused by Toxoplasma gondii, which can infect diverse hosts, including dogs. Although T. gondii infection in dogs is usually subclinical, they are susceptible to infection and develop a specific immune response to the parasite. In 2018, the largest outbreak of human toxoplasmosis in the world occurred in Santa Maria, in southern Brazil; however, the impact of this outbreak on other hosts was not investigated at the time. Considering that dogs often share the same environmental sources of infection as humans, mainly water sources, and that in Brazil, the detection rates of anti-T. gondii immunoglobulin G (IgG) in dogs is very high, this study investigated the frequency of anti-T. gondii IgG in dogs in Santa Maria before and after the outbreak. A total of 2.245 serum samples were analyzed, 1159 collected before the outbreak and 1086 collected after the outbreak. Serum samples were tested for anti-T. gondii antibodies using an indirect immunofluorescence antibody test (IFAT). The infection detection of T. gondii was 16% (185/1159) before the outbreak and 43% (466/1086) after the outbreak. These results showed the infection of dogs with T. gondii and the high frequency of anti-T. gondii antibodies in dogs after the outbreak in humans in 2018, reinforcing water as a possible source of infection and the importance of including toxoplasmosis in the differential diagnosis of dogs.
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Affiliation(s)
- Ana Paula Gnocato Mortari
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Larissa Godoy Tagarra
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Michelli Lopes de Souza
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Isac Junior Roman
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Fabiana Raquel Ratzlaff
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Patricia Braunig
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Cínthia Melazzo de Andrade
- Laboratório Clínico Veterinário (LCV), Departamento de Clínica de Pequenos Animais, Universidade Federal de Santa Maria, Av. Roraima, 1000, Hospital Veterinário, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Juliana Felipetto Cargnelutti
- Laboratório de Bacteriologia (LABAC), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Luis Antonio Sangioni
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil
| | - Fernanda Silveira Flôres Vogel
- Laboratório de Doenças Parasitárias (LADOPAR), Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 63D, Santa Maria, Rio Grande Do Sul, 97105-900, Brazil.
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Dorsch MA, Cesar D, Bullock HA, Uzal FA, Ritter JM, Giannitti F. Fatal Toxoplasma gondii myocarditis in an urban pet dog. Vet Parasitol Reg Stud Reports 2022; 27:100659. [PMID: 35012716 DOI: 10.1016/j.vprsr.2021.100659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 11/02/2021] [Indexed: 01/12/2023]
Abstract
A 70-day-old Boxer dog from a household in Montevideo, Uruguay, died after presenting neurologic, respiratory, and gastrointestinal signs for 6 days. Autopsy findings included lymphadenomegaly, ascites and hepatomegaly. Histopathology revealed severe widespread lymphohistiocytic and plasmacytic myocarditis with cardiomyocyte necrosis, mineralization and numerous intrasarcoplasmic protozoa immunoreactive with anti-Toxoplasma gondii antisera on immunohistochemistry. The protozoa were ultrastructurally confirmed as T. gondii by transmission electron microscopy. Other lesions included diffuse centrilobular hepatocellular necrosis, multifocal lymphohistiocytic portal hepatitis and interstitial nephritis. Other causes of myocarditis, including Neospora caninum, Trypanosoma cruzi, Sarcocystis neurona, canine distemper virus, and canine parvovirus were ruled out by immunohistochemistry. Toxoplasma gondii infections in dogs are usually subclinical; however, clinical disease with fatal outcome can occur. To our knowledge, this is the first report of fatal toxoplasmosis in a dog in Uruguay. This case raises awareness for dogs as sentinels and possible sources of human toxoplasmosis in urban settings in Uruguay.
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Affiliation(s)
- Matías A Dorsch
- Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), Estación Experimental La Estanzuela, Ruta 50 km 11, La Estanzuela 70000, Colonia, Uruguay
| | | | | | - Francisco A Uzal
- California Animal Health and Food Safety (CAHFS) Laboratory, University of California Davis, San Bernardino, CA, USA
| | - Jana M Ritter
- Infectious Diseases Pathology Branch, Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA
| | - Federico Giannitti
- Plataforma de Investigación en Salud Animal, Instituto Nacional de Investigación Agropecuaria (INIA), Estación Experimental La Estanzuela, Ruta 50 km 11, La Estanzuela 70000, Colonia, Uruguay.
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Borges-Silva W, Rezende-Gondim MM, Galvão GS, Rocha DS, Albuquerque GR, Gondim LP. Cytologic detection of Toxoplasma gondii in the cerebrospinal fluid of a dog and in vitro isolation of a unique mouse-virulent recombinant strain. J Vet Diagn Invest 2021; 33:591-594. [PMID: 33719752 DOI: 10.1177/1040638721996685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Parasites resembling Neospora caninum or Toxoplasma gondii were detected by cytologic examination of cerebrospinal fluid (CSF) from a dog with neurologic disease. The dog became severely ill and was euthanized. Canine tissue homogenates were used for direct parasite isolation in cell culture, bioassay in 2 mouse lineages, and PCR. T. gondii was isolated in monkey kidney cells, and species identity was confirmed by PCR. Inoculated parasites were highly virulent for mice, which developed clinical signs and were euthanized immediately. PCR-RFLP for T. gondii using the cultured isolate (TgDgBA22) was conducted with 12 genetic markers, and a unique recombinant strain was identified. Detection of T. gondii by CSF cytology, although described in humans, had not been reported previously in dogs, to our knowledge, and was crucial for the diagnosis of toxoplasmosis in the examined dog.
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Affiliation(s)
- Waléria Borges-Silva
- Department of Veterinary Anatomy, Pathology and Clinics, School of Veterinary Medicine and Animal Science, Federal University of Bahia, Bahia, Brazil
| | - Mariana M Rezende-Gondim
- Department of Veterinary Anatomy, Pathology and Clinics, School of Veterinary Medicine and Animal Science, Federal University of Bahia, Bahia, Brazil
| | - Gideão S Galvão
- Department of Veterinary Anatomy, Pathology and Clinics, School of Veterinary Medicine and Animal Science, Federal University of Bahia, Bahia, Brazil
| | - Daniele S Rocha
- Department of Agricultural and Environmental Sciences, State University of Santa Cruz, Campus Soane Nazaré de Andrade, Bahia, Brazil
| | - George R Albuquerque
- Department of Agricultural and Environmental Sciences, State University of Santa Cruz, Campus Soane Nazaré de Andrade, Bahia, Brazil
| | - Luís P Gondim
- Department of Veterinary Anatomy, Pathology and Clinics, School of Veterinary Medicine and Animal Science, Federal University of Bahia, Bahia, Brazil
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Dubey JP, Murata FHA, Cerqueira-Cézar CK, Kwok OCH, Yang Y, Su C. Toxoplasma gondii infections in dogs: 2009-2020. Vet Parasitol 2020; 287:109223. [PMID: 33160144 DOI: 10.1016/j.vetpar.2020.109223] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/23/2020] [Accepted: 08/24/2020] [Indexed: 01/28/2023]
Abstract
Toxoplasma gondii infections are common in humans and animals worldwide. The present review summarizes worldwide information on the prevalence of clinical and subclinical infections, epidemiology, diagnosis, and genetic diversity of T. gondii in dogs (Canis familiaris) from 2009-2020. Seroprevalence estimates of T. gondii worldwide were tabulated. Reports of high seroprevalence in canine population and high congenital transmission of T. gondii in dogs in Brazil are reviewed. Most reports from China were published in Chinese, and these reports are now summarized here. Dogs have an additional importance in some countries such as China, Vietnam, and Nigeria; whereas in many cities dog meat is sold commercially for human consumption and given to felids, and transmission of T. gondii could occur if meat is not cooked properly. Dogs can ingest T. gondii-infected cat feces and these oocysts remain viable after passage through the digestive tract of the dog; T. gondii DNA was found in feces of dogs from New York City parks in USA. Most clinical canine cases of toxoplasmosis were in immunosuppressed dogs, and ulcerative dermatitis was one of the main presentations. Genetic diversity based on PCR-RFLP markers using DNA derived from 133 viable T. gondii isolates from dogs from several countries is discussed. T. gondii strains from Asia and Americas were more genetically diverse than those from Africa. This review will be of interest to biologists, parasitologists, veterinarians, and public health workers.
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Affiliation(s)
- Jitender P Dubey
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD 20705-2350, USA.
| | - Fernando H A Murata
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD 20705-2350, USA
| | - Camila K Cerqueira-Cézar
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD 20705-2350, USA
| | - Oliver C H Kwok
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD 20705-2350, USA
| | - Yurong Yang
- Laboratory of Veterinary Pathology, College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, PR China
| | - Chunlei Su
- Department of Microbiology, University of Tennessee, Knoxville, TN 37996-0845, USA
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Calero-Bernal R, Gennari SM. Clinical Toxoplasmosis in Dogs and Cats: An Update. Front Vet Sci 2019; 6:54. [PMID: 30863754 PMCID: PMC6399377 DOI: 10.3389/fvets.2019.00054] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 02/07/2019] [Indexed: 01/01/2023] Open
Abstract
Toxoplasmosis is caused by the globally distributed protozoan parasite Toxoplasma gondii (phylum Apicomplexa); the disease can be clinically important for almost all homeothermic animals, including birds and humans. Toxoplasmosis course involves general clinical signs, such as fever, anorexia, or dyspnea, and more specific signs with neural, respiratory, cutaneous, or ocular involvement. Because of the wide range of clinical signs, the diagnosis in domestic and pet animals can be complicated. Hence, this review aims to provide a comprehensive analysis of some scarcely discussed aspects of toxoplasmosis, such as ocular and cutaneous manifestations, congenital infections, influence of T. gondii genotype on clinical toxoplasmosis, and recent findings regarding differential diagnosis. This review could be of special interest to clinicians and researchers.
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Affiliation(s)
- Rafael Calero-Bernal
- Saluvet Group, Department of Animal Health, Complutense University of Madrid, Madrid, Spain
| | - Solange M. Gennari
- Program of Master's in Animal Medicine and Welfare, Faculty of Veterinary Medicine, University of Santo Amaro, São Paulo, Brazil
- Faculty of Veterinary Medicine, University of São Paulo, São Paulo, Brazil
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Canine morbillivirus (canine distemper virus) with concomitant canine adenovirus, canine parvovirus-2, and Neospora caninum in puppies: a retrospective immunohistochemical study. Sci Rep 2018; 8:13477. [PMID: 30194440 PMCID: PMC6128882 DOI: 10.1038/s41598-018-31540-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 08/21/2018] [Indexed: 01/15/2023] Open
Abstract
A retrospective immunohistochemical study was designed to investigate the frequency of concomitant traditional infectious disease pathogens in puppies that died suddenly and review the aspects of associated pathogenesis. Fifteen puppies were evaluated; the pathology reports and histopathologic slides of these animals were reviewed to determine the pattern of histopathologic lesions. The intralesional identification of antigens of canine (distemper) morbillivirus (CDV), canine adenovirus-1 and -2 (CAdV-1 and -2), canine parvovirus-2 (CPV-2), Toxoplasma gondii, and Neospora caninum was evaluated by IHC within the histopathologic patterns observed. All puppies contained CDV nucleic acid by molecular testing. The most frequent histopathologic patterns were intestinal crypt necrosis (n = 8), white matter cerebellar demyelination (n = 7), necrohaemorrhagic hepatitis (n = 7), interstitial pneumonia (n = 7), and gallbladder oedema (n = 5). All puppies contained intralesional antigens of CDV in multiple tissues resulting in singular (n = 3), and concomitant dual (n = 3), triple (n = 5) and quadruple (n = 4) infections by CAdV-1, and -2, CPV-2, and N. caninum; T. gondii was not identified. Concomitant infections by CDV was observed with N. caninum (100%; 1/1), CPV-2 (100%; 8/8), CAdV-1 (100%; 8/8), and CAdV-2 (100%; 8/8). Intralesional antigens of CDV and not CAdV-1 were identified in cases of gallbladder oedema. The “blue eye” phenomenon was histologically characterized by corneal oedema and degenerative lesions to the corneal epithelium, without inflammatory reactions.
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Silva RCD, Caffaro K, Paula CL, Risseti RM, Langoni H, Megid J, Melanchauski MS, Souza KL, Takahira RK, Machado VMDV. An atypical Toxoplasma gondii genotype in a rural Brazilian dog co-infected with Leishmania (Viannia) braziliensis. Rev Soc Bras Med Trop 2015; 48:224-7. [DOI: 10.1590/0037-8682-0284-2014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 02/24/2015] [Indexed: 11/22/2022] Open
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Plugge NF, Ferreira FM, Richartz RRTDB, Siqueira AD, Dittrich RL. Occurrence of antibodies against Neospora caninum and/or Toxoplasma gondii in dogs with neurological signs. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA 2011; 20:202-6. [DOI: 10.1590/s1984-29612011000300004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 08/03/2011] [Indexed: 11/22/2022]
Abstract
This study aimed to evaluate occurrences of antibodies against Neospora caninum and Toxoplasma gondii in dogs with neurological signs. Blood samples from 147 dogs were collected: 127 from owned dogs (attended at the Veterinary Teaching Hospital of the Federal University of Paraná (HV-UFPR) and at private veterinary clinics in the city of Curitiba), and 20 from stray dogs found in Curitiba's metropolitan region. The dogs presented one or more of the following neurological signs: seizures, paresis or paralysis, ataxia, behavioral abnormalities, sensory and somatic disorders and chorioretinitis. The samples were analyzed by means of the indirect fluorescent antibody test (IFAT), at a cutoff dilution of 1:50. Out of the 147 samples obtained, 17 (11.56%) were seropositive for N. caninum, 31 (21.08%) for T. gondii and four (2.72%) for both protozoa. Serum titration on the positive animals showed that 54.83% (17/31) and 41.18% (7/17) had titers > 1:200 against T. gondii and N. caninum, respectively. A significant difference in seropositivity for T. gondii (P = 0.021; OR = 2.87; CI = 1.1 > 2.8 > 7.4) was observed between owned dogs (18.11%) and stray dogs (40%). Inclusion of serological tests for neosporosis and toxoplasmosis is recommended in diagnosing neurological diseases in dogs.
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Javadi S, Asri Rezaei S, Tajik H, Hadian M, Shokouhi F. Haematological changes of cats with Toxoplasma gondii-specific antibodies. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s00580-009-0869-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ribeiro MG, Salerno T, Mattos-Guaraldi ALD, Camello TCF, Langoni H, Siqueira AK, Paes AC, Fernandes MC, Lara GHB. Nocardiosis: an overview and additional report of 28 cases in cattle and dogs. Rev Inst Med Trop Sao Paulo 2008; 50:177-85. [PMID: 18516465 DOI: 10.1590/s0036-46652008005000004] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2007] [Accepted: 02/21/2008] [Indexed: 02/25/2023] Open
Abstract
Phenotypic characteristics, antimicrobial susceptibility profile, and clinical-epidemiological features of 28 Nocardia strains isolated from 19 cases of bovine mastitis, eight cutaneous-subcutaneous lesions and one case of pneumonia in dogs were evaluated. Microbiological, biochemical, cytological and scanning electron microscopy methods were used in diagnosis. Nocardia asteroides type IV, Nocardia otitidiscaviarum,Nocardia nova (type III) and Nocardia farcinica (type V) were isolated from bovine milk, bronchial lavage and/or cutaneous-subcutaneous abscesses in dogs. Nocardial bovine mastitis was diagnosed predominantly in clinical cases, in dairy herds with poor environmental hygienic conditions between milking and inappropriate intramammary therapy. Canine nocardiosis was observed commonly in animals co-infected with distemper virus. Sulphamethoxazole-trimethoprim (92.8%), amikacin (92.8%) and ceftiofur (92.8%) were the most effective drugs in 28 isolates. Multiple drug resistance to three or more and five or more antimicrobials was observed in ten (35.7%) and three (10.7%) strains, respectively, predominantly with use of cloxaxillin, cefoperazone and ampicillin. The species (type) classification, clinical-epidemiological characteristics, diagnosis, multiple-drug resistance and public health considerations in Nocardia strains isolated from cattle and dogs in Brazil are discussed, with special reference to report of bovine mastitis by N. otitidiscaviarum by first time in Brazil and the similarity between Nocardia species isolated from human and animal origin.
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Affiliation(s)
- Márcio Garcia Ribeiro
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, UNESP, Botucatu, SP, Brazil.
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