Be able to invade our country and its diagnosis and treatment of the human eye worm
Author: Han the East China Sea, Feng
own country, Han Huilin
【Abstract】 Objective To investigate the invasive nematode
species of China's human eye and its diagnosis and treatment for eye worm disease prevention and treatment of clinical information provided. Methods based on since the founding of China's medical parasitology research published theory, research papers, etc., in accordance with clinical medicine, preventive medicine, the practical needs, from important types, prevalence, it is important hosts, parasitic eye stage, invasive eye channels, pathogen morphology, eye damage, diagnosis and treatment, the brief introduction to the human
eye worm invasion of our country and treat the disease. The results of this paper, the parasitic nematodes in our country's 11 species of the human eye, except a very few types of natural infection in the country has not yet beyond the
rest of China have a natural epidemic; invasive stage of the human eye, mostly parasitic larvae, a small number of adults. Conclusion China's vast territory, large population, may be parasitic on the human body are more types of parasites. With the development of medical science, or intrusion into the eyes of the parasite will continue to be discovered. Due to many constraints, this review may not include the newly discovered species. This article is intended to serve as a catalyst in order to arouse the concern of colleagues in order to promote prevention and treatment of eye diseases.
Key words Eye worm disease; nematode; treatment
Nematodes belonging to Nemathelminthes, Nematoda and
variety, most of the business self-life, a small number of
parasites in humans and animals, causing the corresponding worm disease, in which a small number of species can affect human and animal eyes, causing eye worm disease.
In our country can invade the human eye there are dozens of species of nematodes, parasitic, which specializes in the
type of eye is not much, so the vast majority of parasitic nematodes are ectopic. As clinicians, lack of knowledge of the diseases, so that affected the correct diagnosis and treatment for patients bring more pain and suffering. Author based on
the relevant literature, will be able to hit the human eye in our country and its diagnosis and treatment of C. elegans are summarized as follows, for clinical workers.
A nematode roundworm class
Yamaguti (1961) the roundworm C. elegans class (not
including the Sharp-tailed type nematodes) were divided into 4 families, 11 subfamilies, 60 genera, a total of more than 500 kinds of . Multi-class adult mammal parasites on human and animal intestines, in which even certain types of larvae can
feed on the human eye, causing eye roundworm larva disease. The more important for the following.
1.1 people roundworm larva Wei Ren roundworm (Ascaris lumbricoides like) larvae.
1.1.1 The prevalence of adult parasites in the human
small intestine, can cause human ascariasis. Pest was widely distributed in China, most parts of the higher rate of infection is one of the most common human parasites. 1988 to 1992, according to China's first nationwide survey of human parasite infection data show that insect infection rate of 47% of the total, it was estimated there are 5.3 million people infected, about the world 41% of the total number of infections  .
1.1.2 Important host definitive host: human.
1.1.3 The stage of parasitic worms in the eyes of the third and fourth stages of larvae.
1.1.4 Eye invasive means of (1) With the blood
circulation to the eye into the retina retinal artery perforation; (2) can also be through the nasopharynx, nasal cavity, nasal lacrimal duct into the lacrimal sac.
1.1.5 pathogenic form of the larvae form of the information described in rare, accounting for Yu Tang Chinese scholars (1958) has reported that out from the eyes of the roundworm larvae of linear, milky white, body length of about
2 mm; but there are large parasites persons, Wu Hua (1986) had from one cases of 6-month-old baby taken out a long-lacrimal
duct 6.5 cm, a diameter of 1.2 mm of the roundworm larva.
1.1.6 eye damage caused by roundworm larvae invade the
eye eye ascariasis. Parasites invade lacrimal, lacrimal sac, which can cause itching, tearing, mobile flu (crawling feeling), and inflammation; invasive subconjunctival cause conjunctivitis; invade the retina, choroid inflammation caused by the corresponding reactions. When the invasion when the fundus, causing vision loss.
1.1.7 Diagnostics (1) Clinical diagnosis: can an infected person's age, occupation, eye symptoms, medical history by asking the initial diagnosis, if the patient addition to local
inflammation, there are more mobile flu diagnosis . (2) Etiology Diagnosis: When the parasites on the tear ducts, they can see the exposure of the parasites through the investigation confirmed.
1.1.8 Control (1) Note that food hygiene to prevent
infection is the key to prevention of this disease; (2) parasites invade lacrimal passage, and sometimes a small point in the lacrimal exposed parasite, the symptoms disappeared after clamp removal; (3) symptomatic treatment .
1.2 dog roundworm Toxocara larva of dog (dog roundworm) larvae. Adults parasitic in mammals, carnivorous animals the small intestine. Roundworm larvae can invade the human eye or other tissues and organs, the cause eye or other parts of Toxocara canis disease.
1.2.1 The prevalence of this worm was a worldwide distribution, a place where dogs have their infection reported. My distribution is very broad, since the 20th century, 20 years since there are dogs around the infected one
after another reported, but reports of human infection are
1.2.2 Important host definitive host: dogs, cats, wolves, foxes and other animals. Men are not the normal host of this pest.
1.2.3 parasitic larvae stage of the eye in four phases, parasitic in the human eye and the larvae within the
organization more in their second or third.
1.2.4 intrusive means of the eye may be pierced with the blood circulation into the retina retinal artery, but also through the nasopharynx, nasal cavity, nasal lacrimal duct
into the lacrimal sac.
1.2.5 pathogenic form of the second and third larvae of linear, milky white, size 370 ~ 934 μm.
1.2.6 eye damage can cause the larvae invade the eye anterior chamber, ciliary body, cornea, retina, optic nerve, choroid and vitreous abscess and other inflammatory; the worm
often can cause optic nerve stimulation, the formation of granulation macula, etc. swelling; result of the disease often accompanied by chronic endophthalmitis, retinal detachment, and granulomatous lesions, it would often clinically
misdiagnosed as the disease while the line of retinoblastoma enucleation surgery, leaving life-long harm to patients.
1.2.7 methods of diagnosis (1) Clinical diagnosis: asking patients Kennel history, personal food hygiene practices, the recent availability of fever, with or without respiratory symptoms, and then look around the availability of the pupil in patients with "white pupil" phenomenon (which is the pest the formation of granuloma lesions), may thus be speculated that diagnosis. (2) Laboratory diagnosis: In the tear ducts when the parasite can be used a magnifying glass to observe parasite diagnosis; while in other parts of the parasite used slit lamp, ophthalmoscopy, or immunological tests such as a comprehensive diagnosis.
1.2.8 Control principles (1) to strengthen the source of infection, such as dogs, cats and other animals, treatment,控
制传染源, bearing in mind the food hygiene to prevent
infection; (2) treatment more difficult, if the use of drugs to kill parasites, may cause eye tissue reaction to the poor
prognosis of visual acuity; also many not be used surgical method to restore eyesight.
2 conjunctival sucking nematode (eye worm)