An 80-year-old male reported to the clinic with complaints of diminished vision, foreign body sensation, and occasionally some black object moving in front of the right eye. Detailed ocular examination revealed three slender creamy white live worms in the conjunctival sac of the right eye. Total three worms were retrieved and sent to the pathology department for detailed examination. The worm was identified as gravid Thelazia callipaeda. As per the search results in PubMed and Cochrane search engine, this is the first report of human case of gravid Thelazia infestation with simultaneous existence of embryonated or ensheathed eggs and primary-stage larvae in the same worm.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6376820 | PMC |
http://dx.doi.org/10.4103/ijo.IJO_1110_18 | DOI Listing |
Acta Trop
September 2022
Department of Veterinary Medicine, University of Bari, Valenzano, Bari 70010, Italy; Faculty of Veterinary Sciences, Bu-Ali Sina University, Hamedan, Iran. Electronic address:
Thelazia callipaeda is a zoonotic nematode parasitizing the eyes of many hosts species, primarily dogs. To date Phortica variegata and Phortica okadai are the only known vectors of this nematode in Europe and China, respectively. In this study we investigated the role played by a third species, Phortica oldenbergi, as vector of T.
View Article and Find Full Text PDFParasit Vectors
June 2022
Dipartimento Di Sanità Pubblica E Malattie Infettive, Sapienza Università Di Roma, Rome, Italy.
Background: Some species of drosophilid flies belonging to the genus Phortica feed on ocular secretions of mammals, acting as biological vectors of the zoonotic eyeworm Thelazia callipaeda. This study describes an effective breeding protocol of Phortica variegata and Phortica oldenbergi in insectary conditions.
Methods: Alive gravid flies of P.
JNMA J Nepal Med Assoc
October 2021
Department of General Practice & Emergency Medicine, Maharajgunj Medical Campus, Institute of Medicine, Kathmandu, Nepal.
Thelaziasis is a zoonotic disease which affects the eye of domestic and wild carnivores caused by the nematode Thelazia. It is transmitted to humans by secretophagous arthropod-borne zoophilic nonbiting flies of the family Drosophilidae. Human thelaziasis is rare and occurs in poor socio-economic families of the rural locations where people live in close proximity with animals.
View Article and Find Full Text PDFJ Med Entomol
January 2022
Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain.
Lachryphagous males of Phortica variegata (Fallén, 1823) are gaining increasing attention in Europe, as they act as vectors of the nematode Thelazia callipaeda Railliet & Henry, 1910, causal agent of thelaziosis, an emergent zoonotic disease. Currently, there are no effective control strategies against the vector, and surveillance and monitoring rely on time-consuming and nonselective sampling methods. Our aim was to improve the knowledge about the population dynamics and the chemical ecology of the species.
View Article and Find Full Text PDFParasit Vectors
November 2019
The Wildlife Toxicology Laboratory, Texas Tech University, Lubbock, TX, 79409-3290, USA.
Background: Oxyspirura petrowi (Spirurida: Thelaziidae), a heteroxenous nematode of birds across the USA, may play a role in the decline of the northern bobwhite (Colinus virginianus) in the Rolling Plains Ecoregion of West Texas. Previous molecular studies suggest that crickets, grasshoppers and cockroaches serve as potential intermediate hosts of O. petrowi, although a complete study on the life-cycle of this nematode has not been conducted thus far.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!