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Is ultrasonography useful for population studies on schistosomiasis mansoni? An evaluation based on a survey on a population from Kome Island, Tanzania

Artikel i vetenskaplig tidskrift
Författare Mats Asztely
Bo Eriksson
Reverianus M Gabone
Lars-Åke Nilsson
Publicerad i Acta Radiologica Open
Volym 5
Nummer/häfte 12
Sidor 8
ISSN 2058-4601
Publiceringsår 2016
Publicerad vid Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi
Institutionen för kliniska vetenskaper, Avdelningen för radiologi
Institutionen för medicin, avdelningen för samhällsmedicin och folkhälsa, enheten för hälsometri
Sidor 8
Språk en
Länkar dx.doi.org/10.1177/2058460116686392
Ämnesord Schistosoma mansoni,ultrasonography,in-service training,mass screening,estimation reliability,population survey
Ämneskategorier Diagnostisk radiologi, Immunologi inom det medicinska området, Mikrobiologi inom det medicinska området, Biostatistik

Sammanfattning

BackgroundObservation of characteristic alterations at liver ultrasonography in clinical schistosomiasis mansoni cases has initiated utilization of this examination method in population surveys in areas where this disease is endemic.PurposeTo present results of liver ultrasonography and their relation to epidemiological data of a population in an area endemic for S. mansoni, to estimate the precision of classification of periportal anatomy changes known as periportal fibrosis (PPF), and to evaluate the relevance of ultrasonography in epidemiological studies on S. mansoni.Material and MethodsA total of 459 inhabitants on Kome Island, Lake Victoria, Tanzania were examined by ultrasound with image documentation by locally trained personnel. A subsample of this population, 116 individuals, was subject to ultrasonography by two examiners independently. Separately, the images were classified for PPF according to the Managil protocol, twice for the subsample.ResultsPPF could be classified for 458 individuals; 64% and 36% were classified as I or II, respectively; none was classified as 0; only one as III. Results were similar for the subsample examined twice. Comparing the two separate classifications of all 232 sets of images of the subsample gave a Kappa (K) value of 0.50. When comparing the classifications of each of the two different examinations of the same individuals of the subsample, K values of 0.29 and 0.34 for the first and second classification, respectively, were obtained.ConclusionUltrasonography does not appear to correlate well with disease stage. Presently, it should not be utilized for staging of schistosoma mansoni-related liver damage in population surveys.

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http://www.gu.se/forskning/publikation/?publicationId=249708
Utskriftsdatum: 2019-09-18