Transmission of Schistosoma japonicum by humans and domestic animals in the Yangtze River valley, Anhui province, China

Wang, Tianping; Maria, Vang Johansen; Zhang, Shiqing; Wang, Feng-Feng; Wu, Wei; GongHua, Zhang; XinPing, Pan; Ju, Yang; Ørnbjerg, N.

doi:10.1016/j.actatropica.2005.07.017

Cited by 85 publications

(77 citation statements)

References 3 publications

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“…They live in close association with human and use the same water sources in their habitat where human schistosomes have been recorded (Yamane et al, 2003). Therefore, it is worth mentioning that schistosomiasis has been eradicated from Japan despite widespread animal reservoir hosts contributing to over 80 % of transmission (Wang et al, 2005). Also, irrigation projects can be constructed to hinder breeding places and to limit human access for domestic activities; China is a good example where control of schistosomiasis is being maintained in spite of vast expansion of irrigation projects through installation of concrete irrigation canals and piping systems for the water supply in order to eliminate the infection sources and Oncomelania snails.…”

Section: Discussionmentioning

confidence: 99%

Some epidemiological and serological studies on schistosomiasis in Najran area, Saudi Arabia

Elshahawy¹,

Mohamed

Adail

2016

Helminthologia

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SummarySchistosomiasis is a major cause of morbidity and mortality and has been estimated to infect over 200 million people. Diagnosis of schistosomiasis by detection of specifi c antibodies is likely to be more sensitive than the traditional method of diagnosis by detection of eggs in stool or urine. Therefore the present study was the fi rst attempt to highlight the seroepidemiology of schistosomiasis among the general population of Najran City, southern of Saudi Arabia, as well as to achieve the performance of the diagnostic tests used. A total of 180 participants attending King Khaled hospital in Najran Province, Saudi Arabia, over a one year period, from September 2013 to September 2014 were screened for the presence of Schistosoma antibody in their blood serum using an indirect hemagglutination assay (IHA). Specifi c immunoglobulin (Ig) G antibody was evaluated using an enzyme-linked immunosorbent assay (ELISA). Out of the 180 samples of sera tested using IHA, 32 (20 %) were found to be positive with a titer ranging from 1:160 to 1:1280, while 42(23.2 %) revealed Schistosoma IgG. A positive relationship was found between the seroprevalence of schistosomiasis and age of tested participants, especially in the age group of 20-40 years old. Additionally, prevalence of infection was more in males (36 %) than females (7.5 %), and showed statistical significance (P < 0.001). Similarly, there was signifi cant association between the presence of Schistosoma antibodies and the nationality of residence, and education of participants (P < 0.05). The current investigation reveals an alarmingly high prevalence of schistosomiasis among participants in Najran, southern region of Saudi Arabia and this supports an urgent need to re-evaluate the current control measures and implement an integrated, targeted and effective schistosomiasis control measures.

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Section: Discussionmentioning

confidence: 99%

Some epidemiological and serological studies on schistosomiasis in Najran area, Saudi Arabia

Elshahawy¹,

Mohamed

Adail

2016

Helminthologia

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“…Second, differences in the amount of faeces examined or in the sampling procedures, for example from cats, among species might be slightly problematic when directly comparing infection prevalence and intensity between species. Due to the logistic difficulty in the sampling of dogs, cats and small rodents, we were not able to get the required amount of faeces each time, as proposed by Wang et al (2005), and thus each sample as a whole, after being weighed, was examined with the miracidia hatching and eggs from the miracidia-positive sediments after hatching were count.…”

Section: Contamination Index For Host Speciesmentioning

confidence: 99%

Contrasting reservoirs for Schistosoma japonicum between marshland and hilly regions in Anhui, China – a two-year longitudinal parasitological survey

et al. 2009

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S U M M A R YSchistosoma japonicum remains highly endemic in many counties in China and has recently re-emerged, to a large extent, in previously controlled areas. To test the hypothesis that small rodents and less agriculturally important domestic animals such as dogs and cats may play an important role in the transmission and potential re-emergence of this disease, an annual investigation of S. japonicum among humans, domestic animals and rodents, combined with detailed surveys of the snail intermediate host, was performed across 3 marshland villages and 3 hilly villages in Anhui province of China over 2 consecutive years. The highest infection prevalence and intensity observed across all mammals was in rodents in the hilly region ; while in the marshland, bovines were suspected as the main reservoirs. However, relatively high infection prevalence levels were also found in dogs and cats in both regions. Such results may have implications for the current human-and bovine-oriented control policy for this medically and veterinarily important disease, particularly within the hilly regions of mainland China.

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“…5,6 Schistosoma japonicum is also known to infect 45 species of animals, of which water buffaloes are especially important for transmission. 7 The zoonotic nature of schistosomiasis japonica renders control particularly challenging. Despite 50 years of intensive control in China, the disease remains of considerable public health…”

Section: 2mentioning

confidence: 99%

Prevalence, intensity and associated morbidity of Schistosoma japonicum infection in the Dongting Lake region, China

Balen

Zhao

Williams

et al. 2007

Bull World Health Organ

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Objective To determine the prevalence and intensity of Schistosoma japonicum infection and associated morbidity, and to estimate the infected human and buffalo populations in the Dongting Lake region, Hunan province, China. Methods We used data from the third national schistosomiasis periodic epidemiological survey (PES) of 2004. These included 47 144 human serological and 7205 stool examinations, 3893 clinical examinations and questionnaire surveys, and 874 buffalo stool examinations, carried out in 47 villages in Hunan province. Serological examinations were performed using the enzyme linked immunosorbent assay technique and human stool samples were examined by the Kato-Katz method. Stools from buffaloes and other domestic animals were examined for schistosome infection by the miracidial hatching test. Findings Sero-prevalence was 11.9% (range: 1.3-34.9% at the village level), and the rate of egg-positive stools was estimated at 1.9% (0-10.9%) for the same population. The prevalence of infection among buffaloes was 9.5% (0-66.7%). Extrapolating to the entire population of the Dongting Lake region, an estimated 73 225 people and 13 973 buffaloes were infected. Most frequently reported symptoms were abdominal pain (6.2%) and bloody stools (2.7%). More than half of the clinically examined people reported having had at least one prior antischistosomal treatment. Conclusion There was a significant reduction in the number of humans infected with S. japonicum since the previous national PES carried out in 1995, partially explained by large-scale chemotherapy campaigns. However, a near-stable number of buffalo infections suggest continuing human re-infection, which may lead to future increases in human prevalence.

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Transmission of Schistosoma japonicum by humans and domestic animals in the Yangtze River valley, Anhui province, China

Cited by 85 publications

References 3 publications

Some epidemiological and serological studies on schistosomiasis in Najran area, Saudi Arabia

Some epidemiological and serological studies on schistosomiasis in Najran area, Saudi Arabia

Contrasting reservoirs for Schistosoma japonicum between marshland and hilly regions in Anhui, China – a two-year longitudinal parasitological survey

Prevalence, intensity and associated morbidity of Schistosoma japonicum infection in the Dongting Lake region, China

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