• 한국동물위생학회지
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• 제25권2호
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• pp.111-116
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• 2002

To demonstrate the prevalence of Toxocara spp eggs in public playgrounds in Seoul city, sand samples collected from March to November in 2001 were examined. Of 2,600 sand samples from 650 playgrounds surveyed, 41 sands from 39 places(6%) had Toxocara rims eggs. Sand samples in apartment complex were more contaminated(9.7%) with the eggs than in residential area(2.4%). Toxocara canis eggs in sands were found in large number of in the spring but other seasons were less found.

• Parasites, Hosts and Diseases
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• 제42권3호
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• pp.137-140
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• 2004

Ocular toxocariasis named also ocular larva migrans is caused by larvae of the roundworm Toxocara spp. The purpose of this study was to find out the seroprevalence of Toxocara antibodies in patients suspected of ocular toxocariasis. Between January 2001 and December 2003, sera from 239 ocular patients, aged 3 to 80 years, were examined by ELISA and confirmed by Western blot test. Out of the 239 patients, 172 (72%) were seronegative and 67 (28%) were Toxocara seropositive; 95% CI (22-34%). The median age of Toxocara seropositive patients was 37.6 years. There was no significant difference in the number of Toxocara positive sera between the younger age group (${\leq}14$ years) and the older age group (＞14 years), p＞0.05. A high rate of Toxocara seropositivity in ocular patients should alert the ophthalmologists in Slovenia to include toxocariasis in the differential diagnosis of eye diseases more frequently.

• Parasites, Hosts and Diseases
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• 제58권4호
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• pp.403-411
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• 2020

Adult ascarid worms from the field mice, Apodemus agrarius, were observed with a light and scanning electron microscope, and molecularly analized with 18S rRNA gene. In the scanning electron microscope, 3 prominent labia were present in the anterior end of male and female worms, but the interlabia and gubernaculum were absent. Scanning electron micrographs showed cervical alae as vestigial organs that looked like a slightly uplifted superficial sewing stitch. Total 6 pairs of post-cloacal papillae were observed on the tail of the male worms. The tail of female worms was blunt and conical shape with a spine-like structure, mucron. The eggs were sub-globular, coated with the albuminous layer and 73 by 82 ㎛ in average size. The superficial pits of T. apodemi egg (mean 8.6×6.7 ㎛) are obviously bigger than those of Toxocara spp. The partial sequence of 18S rRNA showed the sequence homology of Toxocara canis (99.6%), Toxocara cati (99.4%), Toxascaris leonina (99.4%), and Toxocara vitulorum (99.2%). Conclusively, it was confirmed that ascarid nematodes, Toxocara apodemi, recovered from striped field mice in Korea are taxonomically conspecific relationship with genus Toxocara and genetic divergence from other Toxocara species.

• 한국안광학회지
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• 제9권2호
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• pp.447-453
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• 2004

광주광역시 소재 어린이 놀이터 토양에서 채취한 80개의 토양시료와 123개의 견변시료를 통해 Toxocara canis 충란에 의한 오염 실태를 조사하였다. 어린이 놀이터에서 수집한 토양시료의 15%에서 Toxocara canis의 충란이 검출되었으며, 공원(25%)과 주택가 공터(17%) 토양의 충란 검출률이 비교적 높게 나타났다. 놀이터 토양의 충란 오염률은 봄 가을이 여름 겨울보다 상대적으로 높았으며 오염률이 높은 공원과 주택가 공터에서 계절적 변동폭이 컸다. 놀이터에서 수집한 총 123개의 견변에 대한 충란 검출 결과 검출률은 31%로 나타났으며 토양시료의 검출률(21%) 보다 높게 나타났다.

• Clinical and Experimental Pediatrics
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• 제64권11호
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• pp.575-581
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• 2021

Background: Toxocariasis is a zoonotic parasitic disease caused by Toxocara canis and Toxocara cati in humans. Various types of T. canis are important. Purpose: The current study aimed to investigate the prevalence of Toxocara spp. in pediatrics in the context of a systematic review and meta-analysis. Methods: The MEDLINE (PubMed), Web of Sciences, Embase, Google Scholar, Scopus, and Cumulative Index of Nursing and Allied Health databases were searched to identify peer-reviewed studies published between January 2000 and December 2019 that report the prevalence of Toxocara spp. in pediatrics. The evaluation of articles based on the inclusion and exclusion criteria was performed by 2 researchers individually. Results: The results of 31 relevant studies indicated that the prevalence of Toxocara spp. was 3%-79% in 10,676 cases. The pooled estimate of global prevalence of Toxocara spp. in pediatrics was 30 (95% confidence interval, 22%-37%; I²=99.11%; P=0.00). The prevalence was higher in Asian populations than in European, American, and African populations. Conclusion: Health policymakers should be more attentive to future research and approaches to Toxocara spp. and other zoonotic diseases to improve culture and identify socioeconomically important factors.

• Parasites, Hosts and Diseases
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• 제51권5호
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• pp.563-567
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• 2013

An ocular Toxocara canis infection is reported for the first time in Vietnam. A 34-year-old man residing in a village of Son La Province, North Vietnam, visited the National Eye Hospital (NEH) in August 2011. He felt a bulge-sticking pain in his left eye and loss of vision occurred over 3 months before visiting the hospital. The eye examination in the hospital showed damage of the left eye, red eye, retinal fibrosis, retinal detachment, inflammation of the eye tissues, retinal granulomas, and a parasitic cyst inside. A larva of Toxocara was collected with the cyst by a medical doctor by surgery. Comparison of 264 nucleotides of internal transcribed spacer 2 (ITS2) of ribosomal DNA was done between our Vietnamese Toxocara canis and other Toxocara geographical isolates, including Chinese T. canis, Japanese T. canis, Sri Lankan T. canis, and Iranian T. canis. The nucleotide homology was 97-99%, when our T. canis was compared with geographical isolates. Identification of a T. canis infection in the eye by a molecular method was performed for the first time in Vietnam.

• 농촌의학ㆍ지역보건
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• 제23권2호
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• pp.295-303
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• 1998

Toxocariasis is a parasitic zoonosis caused by infestation of humans with larvae of Toxocara canis, the common roundworm in dogs. Two syndromes have been identified : visceral larva migrans and ocular toxocariasis. In this study we were characterized proteinase activity in crude extracts from liver, lung, kidney and heart of mice infected with Toxocara canis and the dynamics of their changes in different stages of disease. The optimal pH was 5.5. In liver of mice infected with Toxocara canis, the maximun activity of proteinase was observed in 5 day post infection. In lung, the activity reached its maximun on 5th day in A group (infected with 100 embryonated eggs), and on 5th week in B group (infected with 50 embryonated eggs). In kidney, the maximum activity was shown at 6th week in A group, and in B group was shown at 10th day. In early infection, the activity reached its maximun in heart of mice infected with Toxocara canis. As we could see, the dynamics of the changes of proteinase activity in mice is similar in the case of the disease with other biochemical and immunological indices observed in toxocariasis.

• 한국동물위생학회지
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• 제33권1호
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• pp.75-80
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• 2010

Eggs of parasite were found 73 of 1,459 in sand samples from public parks and playgrounds in Incheon for 5 years (from 2004 to 2008). Of the 1,459 sand samples examined, 17.8% of samples were found to be positive ova of Toxocara canis, 11.0% for Toxocaris leonina, 5.5% for Toxocara cati, 2.7% Ancylostoma caninum and 1.4% for Strongyloides spp. It was found mixed infestation with Toxocara canis and Toxocara cati 60.2%.

• 대한수의사회지
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• 제21권1호
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• pp.43-47
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• 1985

Striking effects of hydrocortisone were observed on the behaviour of Toxocara canis larvae in 2 months old dogs. Four cross-breed dogs were used in this studies and each dog was inoculated 3000 infective eggs. The larvae were recovered from 2 dogs (contro

• Parasites, Hosts and Diseases
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• 제38권4호
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• pp.267-273
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• 2000

We report 5 cases of ocular toxocariasis in Korean adults complaining of visual impairment along with floating or bubbling sensation. Fundoscopic examination revealed a retinal detachment along with exudate in 4 cases. They all showed typical reaction by ELISA and immunoblot against Toxocra excretory-secretory antigen. One case showed high level of anti-Toxocara IgE antibodies (34.000 Toxocara units/L) as well as increased level of serum total IgE antibodies and the specific IgE antibodies for 3 inhalant antigens, suggesting that high level of anti-Toxocara IgE antibodies was associated with an atopic status. Clinical manifestations were improved after the sequential use of steroids then mebendazole. We also suggest that ocular toxocariasis should be thoroughly investigated even when an evocative uniocular inflammatory lesion is encountered in peripheral retina without a systematic disease.