There have been some reports on schistosomiasis of school children in Sudan’s Nile River basin area; however, information about the infection status of Schistosoma species and intestinal helminths among village residents of this area is very limited. Urine and stool samples were collected from the 1,138 residents of the Al Hidaib and Khour Ajwal villages of White Nile State, Sudan in 2014. The prevalence of overall schistosomiasis and intestinal helminthiasis was 36.3% and 7.7%, respectively. Egg positive rates were 35.6% for Schistosoma haematobium, 2.6% for S. mansoni, and 1.4% were mixed. The prevalence of schistosomiasis was significantly higher in men (45.6%) than in women (32.0%), in Khou Ajwal villagers (39.4%) than in Al Hidaib villagers (19.2%), and for age groups ≤15 years old (51.5%) than for age groups >15 years old (13.2%). The average number of eggs per 10 ml urine (EP10) of S. haematobium infections was 18.9, with 22.2 eggs in men vs 17.0 in women and 20.4 in Khou Ajwal villagers vs 8.1 in Al Hidaib villagers. In addition to S. mansoni eggs, 4 different species of intestinal helminths were found in the stool, including Hymenolepis nana (6.6%) and H. diminuta (1.0%). Collectively, urinary schistosomiasis is still prevalent among village residents in Sudan’s White Nile River basin and was especially high in men, children ≤15 years, and in the village without a clean water system. H. nana was the most frequently detected intestinal helminths in the 2 villages.
Child ; Eggs ; Female ; Helminthiasis ; Helminths ; Humans ; Hymenolepis nana ; Male ; Ovum ; Prevalence ; Rivers ; Schistosoma ; Schistosoma haematobium ; Schistosoma mansoni ; Schistosomiasis haematobia ; Schistosomiasis ; Sudan ; Water

Urinary schistosomiasis(bilharziasis), caused by digenetic bloodfluke, is an endemic disease in Africa, Yemen, Saudi Arabia, Israel, Lebanon, Syria and Iran, but not in Korea. We report one case of urinary schistosomiasis in Korea, who worked in North Yemen, with the review of literatures.
Africa ; Endemic Diseases ; Iran ; Israel ; Korea ; Lebanon ; Saudi Arabia ; Schistosomiasis ; Schistosomiasis haematobia* ; Syria ; Yemen

OBJECTIVETo describe the characteristic magnetic resonance imaging (MRI) appearance of cerebral schistosomiasis.

METHODSTwenty-five patients whose diagnosis of central nervous system (CNS) schistosomiasis had been pathologically (n = 8) and clinically (n = 17) confirmed were randomly selected. MRI was performed on a Signal 1. 5T MRI scanner before and after the intravenous administration of gadopentetate dimeglumine constrast medium. We reviewed the MRI studies obtained at the time of initial presentation, as well as follow-up studies obtained during and after medical treatment.

RESULTSImmunological tests in 15 patients indicated schistosomiasis haematobium. Contrast-enhanced T1-weighted images in 22 cases showed central linear enhancement surrounded by multiple enhancing punctate nodules, which appeared "arborized". Through operation and pathological examination, 8 cases had the granuloma formation of schistosomal eggs extensive surrounded by inflammation and venous congestion. And 17 cases were treated with praziquantel and corticosteroid therapy. And they were followed up for 2 months by taking MRI, which turned out to be complete resolution of the enhancing structure and edema. At follow-up, all the patients' initial symptoms also resolved.

CONCLUSIONThe specified MRI enhancement pattern of cerebral schistosomiasis is common in most cases of CNS schistosomiasis, so it should be taken account into the diagnosis of cerebral schistosomiasis.

Adolescent ; Adult ; Aged ; Brain ; pathology ; Brain Diseases ; diagnosis ; pathology ; Child ; Contrast Media ; Female ; Follow-Up Studies ; Gadolinium DTPA ; Humans ; Image Enhancement ; Magnetic Resonance Imaging ; methods ; Male ; Middle Aged ; Neuroschistosomiasis ; diagnosis ; pathology ; Schistosomiasis haematobia ; diagnosis ; pathology

BACKGROUND: Schistosoma haematobium which causes urogenital schistosomiasis (UGS) is highly prevalent in African countries. Urine microscopy (UM) is the first-line diagnostic method of UGS. Enzyme-linked immunosorbent assay (ELISA) is a common method for screening many parasite infections primarily or alternatively. The present study established an in-house diagnostic system by ELISA and evaluated its diagnostic efficacy in comparison with UM for screening UGS in White Nile State, Republic of Sudan, 2011–2013. METHODS: A total of 490 participants were screened by UM or ELISA, and 149 by both. The in-house ELISA system was established employing soluble egg antigen of S. haematobium and the cut-off absorbance was set at 0.270. RESULTS: Of the 149 subjects, 58 participants (38.9%) were positive by UM, 119 (79.9%) were positive by ELISA and 82 (55.0%) showed consistently positive or negative results by both methods. The diagnostic sensitivity of ELISA was 94.8% and specificity was 29.7% based on UM results. The ELISA positive serum samples also cross-reacted with egg antigens of Schistosoma mansoni and Schistosoma japonicum. CONCLUSION: We have established in-house ELISA for screening serum immunoglobulin (Ig) G antibodies by employing soluble egg antigen of S. haematobium for diagnosis of UGS with 94.8% sensitivity and 29.7% specificity. The ELISA system can supplement the conventional diagnosis by UM.
Antibodies ; Diagnosis* ; Enzyme-Linked Immunosorbent Assay* ; Immunoglobulins ; Mass Screening ; Methods ; Microscopy* ; Ovum ; Parasites ; Schistosoma haematobium* ; Schistosoma japonicum ; Schistosoma mansoni ; Schistosoma* ; Schistosomiasis haematobia ; Sensitivity and Specificity ; Sudan

Recently, many peoples travel abroad for sightseeing, business, missionary and other works. At the same time, imported parasitic diseases including malaria has been increased in Korea. The vector borne and food borne diseases were imported from many other countries, Africa, Middle East and South east Asia. Recently many foreigners entered to Korea for studying, working and other purposes. Imported foods, fishes, meats, vegetables are important for parasitic infection, too. The author reviewed imported parasitic diseases in Korea from 1970 to 2006 with literatures. Malaria is most prevalent. And babesiosis of 6 cases, cutaneous leishmaniasis of over 20 cases, visceral leishmaniasis of 5 cases, loiasis of 3 cases, gnathostomiasis of 40 cases, angiostrongylosis of 10 cases, heterophydiasis of 2 cases, schistosomiasis haematobium of 6 cases, schistosomiasis mansoni of 3 cases, hydatidosis of 24 cases, cutaneous larva migrans of 4 cases, and one case of ancylostomiasis, syngamosis, cutaneous myiasis and pentastomiasis are reported, respectively. The protozoa of 5 species and helminthes of 11 species are imported from many other countries. In Korea, re-emerging malaria was appeared at Demilitarized zone (DMZ) on 1993. Last year, 2,051 cases of indigenous malaria were reported by Korean Center for Diseases Control (KCDC). However, the most prevalent imported malaria was Plasmodium falciparum and indigenous malaria was only P. vivax. For the prevention of imported parasitic diseases, the education, training for tropical medicine, supply of medication and vaccine are needed. The surveillance system for imported diseases was started by KCDC on 2001.
Africa ; Ancylostomiasis ; Animals ; Babesiosis ; Commerce ; Echinococcosis ; Education ; Emigrants and Immigrants ; Far East ; Fishes ; Foodborne Diseases ; Gnathostomiasis ; Helminths ; Humans ; Korea ; Larva Migrans ; Leishmaniasis, Cutaneous ; Leishmaniasis, Visceral ; Loiasis ; Malaria ; Meat ; Middle East ; Missions and Missionaries ; Myiasis ; Parasites ; Parasitic Diseases* ; Plasmodium falciparum ; Schistosomiasis haematobia ; Schistosomiasis mansoni ; Tropical Medicine ; Vegetables

OBJECTIVETo study an intervention model of "schools without infected students with schistosoma japonica", to control and prevent students from schistosoma infection.

METHODSTwelve primary schools of four heavy endemic counties (districts) with schistosomiasis in the Poyang Lake areas were selected as the study fields, of which, ten schools were the experimental groups, and the other two schools were the control groups by cluster random sampling. All enrolment students were the target population. The baseline survey was carried out in 2005, and an intervention model, "information dissemination + behavior participation + behavior encouragement", was applied in the experiment groups in 2006 - 2008, then the effect of intervention was assessed.

RESULTSBefore intervention (2005), the anti-schistosomiasis knowledge awareness rate of experimental and control groups were 14.75% (324/2196) and 16.58% (91/549), and the different was not significant (χ(2) = 1.14, P > 0.05); the rate of accurate attitude of anti-schistosomiasis were 14.71% (323/2196) and 11.84% (65/549) in experimental and control groups, and the difference was not significant (χ(2) = 2.98, P > 0.05); the rate of contacting infected water were 15.44% (18 988/122 976) and 15.03% (4622/30 744) in experimental and control group and the difference was not significant (χ(2) = 3.13, P > 0.05); and the infection rate of schistosomiasis of experiment control groups were 9.65% (212/2196) and 10.56% (58/549), the difference was not significant (χ(2) = 0.41, P > 0.05). After one year intervention (2006), the anti-schistosomiasis knowledge awareness rate of experimental and control groups were 97.79% (2032/2078) and 18.11% (98/541), and the different was significant (χ(2) = 1794.31, P < 0.01); the rate of accurate attitude of anti-schistosomiasis were 99.09% (2059/2078) and 13.49% (73/541) in experimental and control group, and the difference was significant (χ(2) = 2077.45, P < 0.01). After 1 - 3 years intervention (2006 - 2008), there were no any contactors with infected water and infectors with schistosome in students of the experiment group in successive 3 years. While in the control group of the same period, the rate contacting infected water were 16.12% (4884/30 296), 11.11% (3079/27 720) and 12.25% (3451/28 168); the infection rate of schistosomiasis were 8.87% (48/541), 7.47% (37/495) and 7.95% (40/503), respectively.

CONCLUSIONThe intervention model of health promotion, "information dissemination + behavior participation + behavior encouragement", can effectively control and prevent students from infecting schistosoma japonica in heavy endemic areas with schistosomiasis.

Animals ; Health Promotion ; Humans ; Schistosomiasis ; prevention & control ; Schistosomiasis japonica ; School Health Services ; Schools ; Students

OBJECTIVE: To construct a schistosomiasis transmission risk assessment system in Wuhan City and preliminary evaluate its application effect, so as to promote the rational allocation of schistosomiasis control resources and accelerate the progress towards schistosomiasis elimination. METHODS: The schistosomiasis risk assessment indicators were collected through referring schistosomiasis surveillance data of Wuhan City from 2014 to 2020, literature review and expert interviews. Indicators within each criterion and sub-criterion were screened using the Delphi method, and a hierarchical structure model was created based on analytic hierarchy process. Quantitative assignment of each indicator was conducted according to relative importance, and the weight and combination weight of each criterion were calculated in each analytic hierarchy framework to create a schistosomiasis transmission risk assessment system, which was used for the schistosomiasis transmission risk assessment in 12 national schistosomiasis surveillance sites in Wuhan City. RESULTS: A three-level schistosomiasis transmission risk assessment system was preliminarily constructed, which included a target layer, 5 criterion layers and 21 sub-criterion layers. Of all indicators in the criterion layer, transmission route had the highest weight (0.433), followed by source of Schistosoma japonicum infection (0.294); and among all indicators in the sub-criterion layer, S. japonicum infection in Oncomelania hupensis and sentinel mice had the highest combination weight (0.125), followed by prevalence of S. japonicum infection in humans (0.091) and bovines (0.053), snail control by chemical treatment (0.049), positive rate of inquiry examinations (0.048), allocation of schistosomiasis control professionals (0.045), and areas of submerged snail-infested settings (0.041). Of the 12 national schistosomiasis surveillance sites in Wuhan City, there were 5 sites with weights of > 0.8, 4 sites with weights of 0.6 to 0.8, and 3 sites with weights of < 0.6 in 2020. CONCLUSIONS A schistosomiasis transmission risk assessment system has been constructed based on analytic hierarchy process in Wuhan City, which may provide a evidence-based basis for health resource allocation and decision-making for schistosomiasis control.
Animals ; Humans ; Cattle ; Mice ; Analytic Hierarchy Process ; Schistosomiasis/prevention & control* ; Schistosomiasis japonica/epidemiology* ; Snails ; Risk Assessment

OBJECTIVETo assess the prevalence of anemia in children with urinary schistosomiasis, malaria and concurrent infections by the two diseases.

METHODSUrine and blood samples were collected from 387 children (216 males and 171 females) to examine urinary schistosomiasis and malaria and to determine hemoglobin concentration at Hassoba and Hassoba Buri village in Amibara woreda, Afar region, Ethiopia.

RESULTSThe overall prevalence of urinary schistosomiasis and Plasmodium falciparum malaria was 24.54% and 6.20% respectively. Only 2.84% of children carried concurrent infections of both parasites. There was high percentage of anemic patients (81.81%) in the coinfected cases than in either malaria (33.3%) or schistosomiasis (38.94%) cases. There was significantly low mean hemoglobin concentration in concurrently infected children than non-infected and single infected (P<0.05). The mean hemoglobin concentration between Plasmodium falciparum and S. haematobium infected children showed no significant difference (P>0.05). The level of hemoglobin was negatively correlated with the number of S. haematobium eggs/10 mL urine (r=-0.6) and malaria parasitemia (r=-0.53).

CONCLUSIONSThe study showed that anemia is higher in concurrently infected children than non-infected and single infected. Furthermore, level of hemoglobin was negatively correlated with the number of S. haematobium eggs and malaria parsitemia. Therefore, examination of hemoglobin status in patients co-infected with malaria and schistosomiasis is important to reduce the risk of anemia and to improve health of the community.

Adolescent ; Anemia ; diagnosis ; epidemiology ; etiology ; Child ; Child, Preschool ; Ethiopia ; Female ; Humans ; Malaria ; complications ; Male ; Prevalence ; Schistosomiasis haematobia ; complications ; diagnosis

The central nervous system involvement of Schistosomiasis is rarely reported in the literatures. The authors report a case of cerebellar Schistosomiasis. A 40-year-old man presented to our hospital with a one year history of dizziness and gait disturbance. The computerized tomography and MRI of the brain and spinal cord showed tumoral form of mass on cerebellar vermis and roof of the fourth ventricle. The histological study of the partially excised cerebellar mass demonstrated granulomatous reaction around Schistosoma mansoni eggs. After operation, praziquantel was used for 7 days(60 mg/kg/day) drally. This is the first case report of central nervous system Schistosomiasis in Korea.
Adult ; Brain ; Central Nervous System ; Cerebellum ; Dizziness ; Eggs ; Fourth Ventricle ; Gait ; Humans ; Korea ; Magnetic Resonance Imaging ; Neuroschistosomiasis ; Ovum ; Praziquantel ; Schistosoma mansoni ; Schistosomiasis* ; Spinal Cord

OBJECTIVETo evaluate the practical value and the advantages of globe geographical positioning with wireless communication monitoring and supervision system in the field survey.

METHODSSpots which were randomly sampled by the National Ministry of Health for the investigation were chosen in the endemic areas for schistosomiasis in Jiangsu, Jiangxi, Anhui, Hunan, Hubei, Sichuan and Yunnan provinces. Portable GPS CEC9680 was used for collecting relevant waypoints and track, recording on-the-spot geographical positions. The positioning data package was sent back synchronously in the form of short message of SMS to the monitoring service center, and the moving routes of the terminal receiver monitored were displayed on the GIS map to achieve real-time supervision and staff scheduling.

RESULTSWith globe geographical positioning with wireless communication monitoring and supervision system, accurate positioning of 12 spots in the provinces of Jiangsu and 3 trial spots for schistosomiasis control with comprehensive treatment designated by the State Council has been established with real-time communicating recording, and monitoring systems.

CONCLUSIONThe globe geographical positioning with wireless communication monitoring and supervision system has provided a technical platform for the survey of schistosomiasis and other infectious diseases.

Animals ; China ; Environmental Monitoring ; methods ; Epidemiological Monitoring ; Geographic Information Systems ; Humans ; Schistosomiasis ; epidemiology ; prevention & control ; Schistosomiasis japonica ; prevention & control