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Indian Pediatr 2016;53:
652-653 |
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Immunochromatography-based Diagnosis of
Rotavirus Infection in Acute Diarrhea
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*Vipin M Vashishtha, Sandeep Thacker and Gajanan Sudhir
Namjoshi
Mangla Hospital and Research Center, Bijnor, UP, India.
Email: [email protected]
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Documentation of rotavirus diarrhea
in a rural, resource-poor setting is a difficult task. We analyzed stool
samples of 103 children admitted for acute diarrhea in a pediatric
hospital in Bijnor, UP, India, using a simple bedside
immunochromatography kit. Rotavirus infection was detected in 47 out of
total of 103 children (45.6%).
Keywords: Dehydration, Epidemiology,
Surveillance.
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E stimates suggest that India has a high burden of
rotavirus diarrhea, and related mortality [1-3]. Most studies evaluating
rotavirus infection used the standard diagnostic techniques like ELISA.
Documentation of rotavirus disease in semi-urban and rural areas
presents challenges due to non-availability of this diagnostic facility.
Immunochromatography is a relatively economical bedside method to detect
rotavirus infection.
This study was conducted at a pediatric hospital
based in a semi-urban area in Bijnor district of Western Uttar Pradesh,
India during 2010 and 2011. Rotavirus detection was performed using
VIKIA Rota-Adeno kit (M/s BioMérieux) on stool samples of children less
than 5 years of age, suffering from acute diarrhea and requiring
hospitalization. Acute diarrheal illness was defined as occurrence of
³3 watery
stools and/or forceful vomiting, and severity was categorized as per
Clarke and Vesikari scoring systems [4,5]. Statistical analysis was
conducted using chi-square and unpaired t-tests. The study was
cleared by hospital’s ethics committee, and informed consent was
obtained from the parents of all included children.
During the study period, 103 under-five children
hospitalized due to acute diarrhea were tested. Key demographic features
are listed in Table I. Most of the testing occurred in
months of May, June and July in both the years (about 98% of total
testing for year 2010 and 73% of total testing for year 2011). Rotavirus
was detected in 47 (45.6%) children. The disease characteristics, except
severity, were similar for rotavirus-positive and rotavirus-negative
cases as per Clarke and Vesikari scoring system. However, these two
scales differ greatly in categorizing the severity. As the Clarke score
does not include direct assessment of dehydration, it is less likely to
identify an episode of disease as severe, as compared to Vesikari score
[6].
TABLE I Characteristics of the Study Participants
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Rotavirus |
Rotavirus |
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positive (n=47) |
pegative (n=56) |
Age (mo)* |
7.6 (4.6) |
7.8 (5.4) |
Male gender, n (%)
|
38 (80.8) |
38 (67.8) |
Lower SES |
11 (23.4) |
17 (30.36) |
Rural residence, n(%)
|
29 (61.7) |
36 (64.3) |
Diarrhea duration* |
6.1 (5.3) |
4.5 (4.3) |
Vomiting |
24 (51%) |
32 (57.1%) |
Severity as per Clarke scoring system |
|
|
Mild, n (%) |
11 (23.4) |
13 (23.2) |
Moderate, n (%) |
33 (70.2) |
42 (75.0) |
Severe, n (%) |
3 (6.4) |
1 (1.8) |
Severity as per Vesikari Scoring system |
|
|
Moderate, n (%) |
5 (10.6) |
7 (12.5) |
Severe, n (%) |
42 (89.4) |
49 (87.5) |
*Mean (SD); SES: Socioeconomic status; all P >0.05.
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The rotavirus disease proportion in this study is
close to the earlier reported studies in hospitalized children using
ELISA for diagnosis of infection. An earlier study showed good
sensitivity and specificity of rapid diagnostic kit when compared to
standard diagnostic test [7], whereas another study reported high false
positivity [8]. Limitations of the study include small sample size, and
lack of comparison of the results with the standard diagnostic method.
These results might not be generalized or representative of the actual
epidemiology. In conclusion, the study re-affirms that significant
proportion of acute diarrhea in hospitalized under-five children is
caused by rotavirus. There is a need to evaluate the rapid diagnostic
kits vis-à-vis standard diagnostics.
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