A survey of intestinal worm infection was conducted in the island-commune of Minh Chau (Van Don district) and the coastal commune of Phuong Nam (Dong Bi district) of the north-eastern province of Quang Ninh. Stool samples of 900 local people were examined using Willis method. A high prevalence of intestinal worm infection with a cumulative infection rate of 94.9% (854/900), of which Ascaris is most common: 94.8% (853/900), followed by Trichuris: 32% and hookwonn: 12.8% was found. Single infection was 58.3% (498/854), co-infection with three species was 5.4% (46/854), with two species, (mainly with Ascaris and Trichuris) was 36.1% (308/854). The infection rate of Ascaris and Trichuris was not different between male and female but increased with ages above 15 years old (97.7% vs 37.7%). However, hookworm infection was found higher (16.9%) in females compared to males (7.9%) (P<0.05) and most increased at the ages of 10 - 15 years old
Helminths ; Epidemiology

Vegetable samples collected in Vu Phuc commune (Thai Binh province) were investigated for worm egg contamination. A 50% cumulative contamination rate was found among the investigated samples, of which Ascaris was 48.8%, Trichuris 42.2%, hookworm 17.8%. The intensity of contamination per 100gr of vegetable was 14+/-7.2 with Ascaris, 10.2+/- 5.6 with Trichuris, 4.4+/-1.8 with hookworm. The contamination rate was 60% in the samples of leaf-eating and raw-eating and 50% in root-eating vegetable. Dead eggs were found in 12.2% and developing eggs were found in 44.4% of samples.
Helminths ; Vegetables

A study was designed and conducted from 1999 to 2001 to evaluate the helminthiasis infection in three communes of Luan Thuong, Long Khanh and Luong Son of Bao Yen district, Lao Cai province where the local people have the backward habits of life and agriculture. A total number of 1,426 stool samples collected from the three investigated sites was examined by Kato method. A high cumulative infection rate of helminthiasis (90.5%) was found, of which Ascaris: 77.3%, hookworm: 65.7%, Trichuris: 20.8%, lung fluke 1.54% and Taenia: 1.12%. The mixed infection rate was 45.6%. The examination of 452 sputum samples showed a lung fluke infection rate of 4.42%.
Helminths ; Epidemiology

Mass deworming with mebendazol 500mg was made in three schools in the districts of Tan Hiep, Hon Dat and An Bien. A prior treatment survey showed a cumulative infection rate of helminth of 15.6% in the school children of which a light infection of Ascariasis, Trichuris and hookworm but high rate of mixed infection (23%) were found. The post-treatment survey showed a 10.7% of the cumulative infection and 9.2% of the mixed infection. The density of three species was light reduced. Six months after treatment, in Hon Dat where the treatment was combined with IEC, the infection rate was found 6.4%, and it was 13.3% in Tan Hiep where no IEC was made. Mass drug administration is thought to be a simple, safe and highly effective method of deworming that can be supported by both teachers and parents of school children. Periodical mass treatment will be more helpful if combined with IEC.
Helminths ; Child

Since 2002, adult worms of human small liver fluke in some provinces were identified by morphology and confirmed by molecular method as Clonorchis sinensis in Thanh Hoa, Ninh Binh, Nam Dinh and Bac Giang province; Opisthorchis viverrini in Phu Yen and Binh Dinh province. This study, using polymerase chain reaction (PCR), a portion of the cytochrome oxidase 1 (410 nucleotide and 136 amino acid) of mitochondrial genome of adult worms of small liver fluke from human in Nghe An (CsNA) and Dong Nai (CsDN) province were amplified. The nucleotide and amino acid of these sequences was comparatively analyzed with the known Clonorchis sinensis (Nam Dinh strain). The analysis revealed that the Nghe An Clonorchis sp and Dong Nai Clonorchis sp (in human) were homology (99.5 - 99.8% nucleotide) and similar (100% amino acid) to the Nam Dinh Clonorchis sinensis (identification was done). Thus, the Nghe An and Dong Nai Clonorchis sp were identified as Clonorchis sinensis in Opisthorchiidae family, Clonorchis genus.
Helminths ; Trematoda ; Human

The screening survey by stool examination prior the third round showed the satisfactory results of the previous rounds of treatment in comparison to the base line survey prior the intervention, the overall prevalence of intestinal worm infection was reduced by 56.3%, of which Ascaris infection by 73.5%, Trichuris by 52.4%, hookworm by 55.1 %. The intensity of infection was also reduced significantly as Ascaris by 61.1 %, Trichuris by 52.2%, hookworm by 81.6%. Nearly all the children (99.6%) in the project schools were treated three times (totally 331,194 times of treatment) with the interval of 6 months. The knowledge, attitude and practice of the children and their parents were found to have been much improved as compared to that before the intervention
Helminths ; Child ; Therapeutics

No abstract available.
Helminths* ; Humans ; Jeollanam-do*

Eosinophils are primarily tissue resident cells, and play important roles in host's immune responses and maintenance of chronic infection during infection with tissue-invasive parasitic helminth. Such parasite secretes particular molecules to evade eosinophil-mediated helminthotoxicity. Continuous competition between eosinophil and parasite leads to stable equilibria between them. Recent evidence provides a concept that not only eosinophils contribute to parasite's survival but also parasite modulates host's immune response. Therefore, it is important to know complex interrelationship between eosinophil and parasite to understand how gently parasite talk to eosinophils and how carefully eosinophils listen to parasite's voice. In this regard, this review examin papers about eosinophil-mediated tissue inflammatory responses in response to helminthic parasite.
Eosinophils ; Helminths ; Parasites ; Voice

An investigation on helminth infection was conducted in the mountainous district (Quy Hop) of Nghe An province in August and September 2002 showed that: the cummulative intestinal helminth infection rate was 68.4%, with the highest rate among the people aged from 6 – 9 years. Ascaris infection rate was 54.2% with the highest rate found among people aged from 10 – 11 years. Hook worm infection rate was 28.6%, most of all were adults. Trichuris was 10.8% with no difference of ages. Single infection rate was 45.5%, mix infection rate was 23.3%, mixed infection between Ascaris and hook worm was the highest 15.7%. There was no big differences of the infection rate in sex. The intensity of intestinal helminth infection was low with average of 1431 epg for Ascaris, 864 epg for hook worm and 112 epg for Trichuris. Community living conditions and their habits were found to influences the intestinal helminth infection
Helminths ; Infection ; Disease ; epidemiology

442 stool samples in 2 groups of population of Lien Vi commune, Yen Hung district, Quang Ninh provine were examined by Kato method. The infection rate of Ascaris, Trichuris, hookworm were 83.7%, 70.3%, 16.7%, respectively. The infection rate of Opisthorchis viverrini was 5.6%. 607 stool samples from primary and basical schools in the commune were examined. The results showed that the infection rate of Ascaris, Trichuris, Hookworm were 99%, 89%, 7.3%, respectively. The mix infection rate was 70%. It was found that most of the local people were using not standardized latrines. They have a habit of using untreated stool as fertilizer or habit of eating raw fish and their low awareness about disease prevention
Helminthiasis ; Helminths ; Disease ; epidemiology