Cutaneous Manifestations of Disseminated Toxoplasmosis in an Immunosuppressed Dog

2005 ◽  
Vol 41 (3) ◽  
pp. 198-202 ◽  
Author(s):  
Jinelle A. Webb ◽  
Sonya L. Keller ◽  
Erin P. Southorn ◽  
Julie Armstrong ◽  
Dana G. Allen ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Hemolytic Anemia ◽  
Neospora Caninum ◽  
Polyclonal Antibodies ◽  
Postmortem Examination ◽  
Sarcocystis Neurona ◽  
Cutaneous Manifestations ◽  
Immune Mediated ◽  
Time Of Presentation

A 3.5-year-old, castrated male, giant schnauzer was presented with alopecic pustular dermatitis. Immune-mediated hemolytic anemia had been diagnosed 45 days previously. At the time of presentation, the dog was receiving prednisone, azathioprine, and cyclosporine. Cutaneous protozoosis was diagnosed, and postmortem examination revealed protozoa within cutaneous, cardiac, pancreatic, and pulmonary tissues. The protozoa divided by endodyogeny, had the morphology of Toxoplasma gondii (T. gondii) tachyzoites, and stained positively with T. gondii polyclonal antibodies but not with antibodies to Neospora caninum or Sarcocystis neurona. Immunosuppression may have predisposed this dog to disseminated toxoplasmosis.

scholarly journals Exposure of free-living jaguars to Toxoplasma gondii, Neospora caninum and Sarcocystis neurona in the Brazilian Pantanal

2014 ◽  
Vol 23 (4) ◽  
pp. 547-553 ◽  
Author(s):  
Selma Samiko Miyazaki Onuma ◽  
Andréia Lima Tomé Melo ◽  
Daniel Luis Zanella Kantek ◽  
Peter Gransden Crawshaw-Junior ◽  
Ronaldo Gonçalves Morato ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Neospora Caninum ◽  
Antibody Test ◽  
Free Living ◽  
Sarcocystis Neurona ◽  
Mato Grosso ◽  
Apicomplexan Parasites ◽  
Wide Range ◽  
Coccidian Parasites ◽  
Brazilian Pantanal

Toxoplasma gondii, Neospora caninum and Sarcocystis neurona are related apicomplexan parasites that cause reproductive and neurological disorders in a wide range of domestic and wild animals. In the present study, the immunofluorescence antibody test (IFAT) was used to investigate the presence of antibodies against T. gondii, N. caninum and S. neurona in the sera of 11 free-living jaguars (Panthera onca) in two protected areas in the Pantanal region of Mato Grosso state, Brazil. Ten jaguars (90.9%) showed seropositivity for T. gondii, eight (72.7%) for S. neurona, and seven (63.6%) for N. caninum antigens. Our findings reveal exposure of jaguars to these related coccidian parasites and circulation of these pathogens in this wild ecosystem. To the best of our knowledge, this is the first serological detection of N. caninum and S. neurona in free-living jaguars.

Prevalence of antibodies to Sarcocystis neurona, Toxoplasma gondii and Neospora caninum in horses from Argentina

1999 ◽  
Vol 86 (1) ◽  
pp. 59-62 ◽  
Author(s):  
J.P. Dubey ◽  
M.C. Venturini ◽  
L. Venturini ◽  
J. McKinney ◽  
M. Pecoraro
Keyword(s):  
Toxoplasma Gondii ◽  
Neospora Caninum ◽  
Sarcocystis Neurona

scholarly journals PREVALENCE OF ANTIBODIES TO NEOSPORA CANINUM, SARCOCYSTIS NEURONA, AND TOXOPLASMA GONDII IN WILD HORSES FROM CENTRAL WYOMING

2003 ◽  
Vol 89 (4) ◽  
pp. 716-720 ◽  
Author(s):  
J. P. Dubey ◽  
S. M. Mitchell ◽  
J. K. Morrow ◽  
J. C. Rhyan ◽  
L. M. Stewart ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Neospora Caninum ◽  
Sarcocystis Neurona

Serosurvey of Toxoplasma gondii, Neospora caninum and Sarcocystis neurona in raptors and risk factor analysis

2021 ◽  
Vol 82 ◽  
pp. 102312
Author(s):  
Ana Paula Sato ◽  
Miúriel de Aquino Goulart ◽  
Aline Luiza Konell ◽  
Marilia de Oliveira Koch ◽  
Flávia Moreira da Fonseca ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Risk Factor ◽  
Toxoplasma Gondii ◽  
Neospora Caninum ◽  
Risk Factor Analysis ◽  
Sarcocystis Neurona

scholarly journals Survey of Toxoplasma gondii, Neospora caninum and Sarcocystis neurona antibodies in wild red-tailed Amazon parrots (Amazona brasiliensis)

2020 ◽  
Vol 29 (1) ◽  
Author(s):  
Ana Paula Sato ◽  
Frederico Fontanelli Vaz ◽  
Aline Luiza Konell ◽  
Marilia de Oliveira Koch ◽  
Rafaela Furioso Ferreira ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Neospora Caninum ◽  
Plasma Samples ◽  
Sarcocystis Neurona ◽  
Blood Samples ◽  
Obligate Intracellular ◽  
Intracellular Parasites ◽  
Antibody Tests ◽  
Immunofluorescence Antibody ◽  
Near Threatened

Abstract Toxoplasma gondii, Neospora caninum and Sarcocystis neurona are obligate intracellular parasites within the phylum Apicomplexa. The red-tailed Amazon parrot (Amazona brasiliensis) is a near-threatened species of psittacine that is endemic to the Atlantic Forest of Brazil and has been designated as a bioindicator because of its sensitivity to environmental qualitative status and changes. The aim of this study was to evaluate the presence of antibodies against T. gondii, N. caninum and S. neurona in wild red-tailed Amazon parrot nestlings on Rasa Island, Brazil. Blood samples were collected from 51 parrots and plasma samples were stored at – 20 °C until immunofluorescence antibody tests (IFAT) were performed. Antigen slides were prepared using tachyzoites of T. gondii (RH strain) and, N. caninum (NC-1 strain) and using merozoites of S. neurona (SNR37 strain). Plasma samples were tested at initial dilutions of 1:16 for T. gondii, 1:50 for N. caninum and 1:5 for S. neurona. An anti-chicken antibody conjugated with FITC was used as a secondary antibody at 1:50 dilution. No antibodies for any of these three protozoa were found, thus suggesting that these wild red-tailed Amazon parrot nestlings had not been exposed to these parasites.

scholarly journals Detection of antibodies against Sarcocystis neurona, Neospora caninum and Toxoplasma gondii in horses, dogs and cat

2019 ◽  
Vol 56 (2) ◽  
pp. e152918
Author(s):  
Marilia De Oliveira Koch ◽  
Luciane Maria Laskoski ◽  
Daniel Moura de Aguiar ◽  
Bianca Ressetti da Silva ◽  
Reinaldo Ramos Régio ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Neospora Caninum ◽  
Fluorescent Antibody ◽  
Clinical Pathology ◽  
Antibody Test ◽  
Serum Samples ◽  
Pathology Laboratory ◽  
Sarcocystis Neurona ◽  
Neurological Signs ◽  
The University

The occurrence and distribution of antibodies against Sarcocystis neurona, Neospora caninum and Toxoplasma gondii was investigated in horses, dogs and cats from Curitiba, Paraná state, Brazil. Serum samples were selected from 100 horses, 100 dogs and 100 cats from the routine of the Veterinary Clinical Pathology Laboratory in the Veterinary Hospital of the University of Paraná (UFPR). The 100 dog samples were divided into two groups: 35 samples from dogs with neurological sign (convulsion) and 65 samples from dogs without neurological signs. The animals were adults of different breeds, males and females. Samples were analyzed by indirect fluorescent antibody test (IFAT) for protozoa S. neurona, N. caninum andT. gondii at the following cut-off dilutions: horses: 1:50, 1:50 and 1:16; dogs: 1:50, 1:50 and 1:16; cats: 1:50, 1:50 and 1:50, respectively. The obtained results were 42% of horses, 7% of dogs and 5% of cats seropositive for S. neurona; 58% of horses, 68% of dogs and 42% of cats seropositive to N. caninum, and 36% of horses, 20% of dogs and 21% of cats seropositive for T. gondii. Among the dogs with neurological signs, 8.6%, 68.6% and 25.7% were seropositive for S. neurona, N. caninum and T. gondii, respectively. Among the dogs without neurological signs, 6.2% 67.7% and 16.9% were seropositive for S. neurona, N. caninum and T. gondii, respectively. No statistical difference was found between groups of seropositive dogs for the three protozoa with neurological signs and without neurological signs. Co-infection and high antibody titers were detected. The antibodies against Sarcocystis neurona, Neospora caninum and Toxoplasma gondii were found widely distributed among horses, dogs and cats in the region of Curitiba, state of Paraná, Brazil.   

Clinical Sarcocystis neurona, Sarcocystis canis, Toxoplasma gondii, and Neospora caninum infections in dogs

2006 ◽  
Vol 137 (1-2) ◽  
pp. 36-49 ◽  
Author(s):  
J.P. Dubey ◽  
Jennifer L. Chapman ◽  
Benjamin M. Rosenthal ◽  
M. Mense ◽  
Ronald L. Schueler
Keyword(s):  
Toxoplasma Gondii ◽  
Neospora Caninum ◽  
Sarcocystis Neurona

scholarly journals Cutaneous toxoplasmosis in an immunosuppressed dog

2014 ◽  
Vol 66 (3) ◽  
pp. 797-800 ◽  
Author(s):  
T.S. Oliveira ◽  
A.P. Turchetti ◽  
F.B.S. Barbosa ◽  
A.L.F. Bicalho ◽  
C.A.D. Alencar ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Rare Case ◽  
Neospora Caninum ◽  
Immunosuppressive Treatment ◽  
Pcr Analysis ◽  
Hemolytic Disease ◽  
Immune Mediated ◽  
Nodular Lesions

A seven-year-old female spayed Schnauzer was presented with cutaneous ulcerated nodular lesions shortly after the beginning of an immunosuppressive treatment for immune-mediated hemolytic disease. Cytology was performed and a great number of neutrophils and banana-shaped organisms were observed. Biopsy showed a neutrophilic and histiocytic dermatitis and panniculitis with myriads of intralesional bradyzoites cysts and tachyzoites. PCR analysis was positive for Toxoplasma gondii and negative for Neospora caninum. Immunohistochemistry confirmed intralesional T. gondii antigens. This study reports a rare case of cutaneous toxoplasmosis in an immunosuppressed dog.

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