Thelaziasis

The following background data on Thelaziasis are abstracted from Gideon www.GideonOnline.com.  Primary references are available from the author. Thelaziasis (“oriental eye worm”) in humans was first reported in China in 1917, and autochthonous cases were initially limited to Asia.  Over 1,000 cases of human infection were estimated for Asia during a 20-year period (2016 publication)  Cases have since been reported in Africa, Asia, Europe and North America.  The condition is most common during summer and fall, and involves proximity to dogs.  61% of patients are either elderly adults, or children ages three to six years. Two of the 16 known species of Thelazia have been reported in humans: T. callipaeda and T. californiensis.  Thelazia callipaeda is a parasite of canids, felids and rodents.  Cases of human and animal infection by this species have been reported in several countries, including Bangladesh, Belgium, China, Croatia, France, Germany, India, Italy, Japan, Portugal, Republic of Korea, Serbia, Spain, Taiwan and Thailand. Thelazia californiensis is a parasite of canids, felids and domestic and wild ruminants.  The species is found in North America (California and the Rocky Mountain region). These parasites are transmitted by non-biting flies which acquire first stage larvae while feeding on ocular secretions, tears and conjunctivae of mammals. The fly vectors of Thelazia callipaeda are Portica variegata, Amiota okadai and Amiota variegata....
Source: GIDEON blog - Category: Databases & Libraries Authors: Tags: General Source Type: blogs