The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform

Susan G Elner - One of the best experts on this subject based on the ideXlab platform.

  • Retinal vasculitis in Toxocara canis neuroretinitis
    Journal of Ophthalmic Inflammation and Infection, 2013
    Co-Authors: Cagri G Besirli, Susan G Elner
    Abstract:

    Background The purpose of this case report is to describe clinical and angiographic findings of retinal vasculitis in acute Toxocara canis neuroretinitis associated with systemic infection. Findings A 16-year-old male presented with a 1 week history of left eye pain, floaters, and decreased visual acuity. Ocular examination was consistent with neuroretinitis and retinal vasculitis. Fluorescein angiography demonstrated leakage of fluorescein from the optic nerve and the retinal veins. Clinical and laboratory evaluation were consistent with systemic Toxocara canis infection. Conclusions Ocular T. canis may present with retinal vasculitis in young patients in the setting of acute systemic infection.

  • Retinal vasculitis in Toxocara canis neuroretinitis.
    Journal of ophthalmic inflammation and infection, 2013
    Co-Authors: Cagri G Besirli, Susan G Elner
    Abstract:

    Background The purpose of this case report is to describe clinical and angiographic findings of retinal vasculitis in acute Toxocara canis neuroretinitis associated with systemic infection.

Cagri G Besirli - One of the best experts on this subject based on the ideXlab platform.

  • Retinal vasculitis in Toxocara canis neuroretinitis
    Journal of Ophthalmic Inflammation and Infection, 2013
    Co-Authors: Cagri G Besirli, Susan G Elner
    Abstract:

    Background The purpose of this case report is to describe clinical and angiographic findings of retinal vasculitis in acute Toxocara canis neuroretinitis associated with systemic infection. Findings A 16-year-old male presented with a 1 week history of left eye pain, floaters, and decreased visual acuity. Ocular examination was consistent with neuroretinitis and retinal vasculitis. Fluorescein angiography demonstrated leakage of fluorescein from the optic nerve and the retinal veins. Clinical and laboratory evaluation were consistent with systemic Toxocara canis infection. Conclusions Ocular T. canis may present with retinal vasculitis in young patients in the setting of acute systemic infection.

  • Retinal vasculitis in Toxocara canis neuroretinitis.
    Journal of ophthalmic inflammation and infection, 2013
    Co-Authors: Cagri G Besirli, Susan G Elner
    Abstract:

    Background The purpose of this case report is to describe clinical and angiographic findings of retinal vasculitis in acute Toxocara canis neuroretinitis associated with systemic infection.

Pedro Paulo Chieffi - One of the best experts on this subject based on the ideXlab platform.

  • Behavioral and memory changes in Mus musculus coinfected by Toxocara canis and Toxoplasma gondii
    Revista do Instituto de Medicina Tropical de Sao Paulo, 2014
    Co-Authors: Flávia Motta Corrêa, Pedro Paulo Chieffi, Susana Angélica Zevallos Lescano, Sérgio Vieira Dos Santos
    Abstract:

    Several researchers have stated that parasites can alter the behavior of their hosts, in order to increase the transmission rate, principally when prey-predator relationships are a reliable way of infection transmission. The aim of this study was to verify the occurrence of changes in anxiety and short-term memory patterns in experimentally infected Mus musculus by Toxocara canis and/or Toxoplasma gondii. Forty male Mus musculus (Balb/c) eight-week-old were divided into four groups of 10 mice each. One group was infected with 300 eggs of Toxocara canis; a second group was submitted to infection with 10 cysts of Toxoplasma gondii; a third group was concomitantly infected with both parasites with the same inoculums and the last group was maintained without infection. The anxiety levels were evaluated using an elevated plus maze and an actometer; the short-term memory was determined by a two-way active avoidance equipment. The determination of anxiety levels were conducted 40 and 70 days after infection and the short-term memory was evaluated 140 days after infection. Mice chronically infected by Toxoplasma gondii showed impaired learning and short-term memory, but no significant differences were found in mice infected by Toxocara canis or concomitantly infected by Toxocara canis and Toxoplasma gondii when compared to non infected mice.

  • Behavioral changes in Rattus norvegicus coinfected by Toxocara canis and Toxoplasma gondii
    Revista do Instituto de Medicina Tropical de Sao Paulo, 2013
    Co-Authors: Maisa Leite De Queiroz, Tânia Araujo Viel, Cássio Henrique Gomide Papa, Susana Angélica Zevallos Lescano, Pedro Paulo Chieffi
    Abstract:

    Using an elevated plus maze apparatus and an activity cage, behavioral changes in Rattus norvegicus concomitantly infected by Toxocara canis and Toxoplasma gondii were studied, during a period of 120 days. Rats infected by Toxocara canis or Toxoplasma gondii showed significant behavioral changes; however, in the group coinfected by both parasites a behavioral pattern similar to that found in the group not infected was observed thirty days after infection, suggesting the occurrence of modulation in the behavioral response.

  • Behavioral changes in Rattus norvegicus experimentally infected by Toxocara canis larvae
    Revista do Instituto de Medicina Tropical de Sao Paulo, 2010
    Co-Authors: Pedro Paulo Chieffi, Renata Telles Rudge De Aquino, Manoel Carlos Sampaio De Almeida Ribeiro, Maria A. Pasqualotti, Antonia Gladys Nasello
    Abstract:

    Toxocara canis is a common canine nematode parasite and one of its possible transmission mechanisms is the predation of infected rodents by canids. Fifty Rattus norvegicus were used to study behavioral alterations in rodents infected by T. canis larvae. The rats were divided into three groups: G1, 20 rats infected with 300 T. canis eggs; G2, 20 rats infected with 2,000 T. canis eggs; and G3, 10 non-infected rats. Thirty and 60 days post-infection, rats from all the groups were submitted to an open-field apparatus for five min and subsequently, to an elevated plus-maze apparatus, again for five min. The data obtained indicated improvement in mobility (total locomotion time and rearing frequency) and exploratory behavior in infected rats, principally in G2, which provides some support for the hypothesis that behavioral alterations in rodents infected by Toxocara canis larvae enhance the transmission rate of this ascarid to dogs.

  • Muscular strength decrease in Rattus norvegicus experimentally infected by Toxocara canis
    Revista do Instituto de Medicina Tropical de Sao Paulo, 2009
    Co-Authors: Pedro Paulo Chieffi, Renata Telles Rudge De Aquino, Maria Aparecida Paschoalotti, Manoel Carlos Sampaio De Almeida Ribeiro, Antonia Gladys Nasello
    Abstract:

    Roedores sao reconhecidos como hospedeiros paratenicos de Toxocara canis. Um dos mecanismos de transmissao desse ascarideo para caes, seus hospedeiros habituais, consiste na predacao de hospedeiros paratenicos, que albergam larvas de terceiro estagio em seus orgaos e tecidos, entre os quais musculos estriados. No presente trabalho estudou-se se a infeccao por larvas de Toxocara canis provoca alteracoes na forca muscular de exemplares de Rattus norvegicus experimentalmente infectados. Cinquenta Rattus norvegicus foram divididos em tres grupos: G1, com 20 ratos infectados com 300 ovos de Toxocara canis; G2, com 20 ratos infectados com 2.000 ovos do ascarideo e G3, com 10 ratos sem infeccao. Dez e 30 dias apos a infeccao determinou-se a forca muscular nas patas dianteiras dos roedores; ao mesmo tempo, avaliou-se seu peso corporal. Nao foram observadas diferencas no peso dos animais dos tres grupos; contudo, verificou-se decrescimo na forca muscular dos ratos infectados com 2.000 ovos apos o 30o dia de infeccao.

Hong Sik Byun - One of the best experts on this subject based on the ideXlab platform.

  • mri findings of spinal visceral larva migrans of Toxocara canis
    European Journal of Radiology, 2010
    Co-Authors: Dae Kun Oh, Pyoung Jeon, Hong Sik Byun
    Abstract:

    Abstract Purpose The purpose of this study is to investigate the MRI findings of visceral larva migrans (VLS) of Toxocara canis in spinal cord. Materials and methods We retrospectively reviewed spinal MRI findings in eight patients with serologically proven Toxocara canis between 2005 and 2008. We evaluated the location, length, extent and migration of the lesion, MR signal intensity (SI), enhancement pattern, and swelling of the spinal cord. We evaluated clinical features including presenting symptoms and signs and treatment response. Results Total 8 patients (M = 8; age range 36–79 years) were included. The lesions were located in the cervical or thoracic spinal cord in all patients. All lesions showed high SI and minimal or mild swelling of involved spinal cord on T2WI and focal nodular enhancement on posterior or posterolateral segment of spinal cord. The length of involved lesion was relatively short in most patients. There was a migration of lesion in one patient. In spite of albendazole or steroid treatment, neurological symptoms or signs were not significantly improved in all patients. Conclusion Although all lesions show non-specific imaging findings like non-tumorous myelopathy mimicking transverse myelitis, single lesion, focal nodular enhancement on posterior or posterolateral segment of spinal cord, relatively short segmental involvement and migration of lesion may be characteristic findings of spinal VLM of Toxocara canis. In addition, the reluctant response to the treatment may be characteristic of spinal VLM of Toxocara canis.

Jill A. Kimm - One of the best experts on this subject based on the ideXlab platform.

  • MR in Toxocara canis myelopathy.
    AJNR. American journal of neuroradiology, 1994
    Co-Authors: Jai Kumar, Jill A. Kimm
    Abstract:

    We present the case of a 23-year-old woman with cerebrospinal fluid eosinophilia and myelopathy caused by Toxocara canis and describe the clinical and thoracic MR findings. An enhancing thoracic spinal cord lesion which was shown on MR resolved after an interval of 140 days with partial resolution of the patient's symptoms.