Review for 10.1186/s12876-020-01591-7 (2021)

Reviewer’s report
Title: 
The clinical features of chronic intestinal schistosomiasis-related intestinal
lesions
Version: 
0 
Date: 
22 Oct 2020
Reviewer's report:
The authors showed the clinical features of Schistosoma related intestinal
lesions, like colorectal polyps, or erosion and IBD. Despite the result of single
facility, some important findings are shown in this report. Especially, chronic
Schistosoma infestation induced the high prevalence of sigmoid colon polyps
and rectal polyps. I think this study is suitable for BMC Gastroenterology under
some revision. 
1) The authors indicate egg-induced yellow nodular changes or yellowish rectal
mucosa in figure.1. However, these images are not enough because they may
look like feces. The authors should show a better figure. For example, as the
authors use the endoscopy with a magnifying function(CF-H260AZI), please
show magnifying endoscopic findings in the mucosal wall, if possible.
2) Chronic Schistosoma infection usually involved various organs like liver or
kidney as Schistosoma infection-induced carcinogenesis. If your cases have
identify any calcification in other organs which is a possibility of secondary
targets, please describe them.
3) Please describe the statistical methods in every tables. 
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Is the study design appropriate to answer the research question (including the use
of appropriate controls), and are the conclusions supported by the evidence
presented?
Yes
Are the methods sufficiently described to allow the study to be repeated?
Yes
Is the use of statistics and treatment of uncertainties appropriate?
Yes
Is the presentation of the work clear?
Yes
Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
Yes