Study the Distribution of Rotavirus Genotypes in Vaccinated and non Vaccinated Children in Babylon Province

Rotaviruses, a major cause of gastroenteritis in children worldwide accounts for around half a million deaths annually. Vaccine against the virus has been recommended by the WHO to be involved in the national immunization program.To evaluate the genetic characterization of rotavirus among children with acute gastroenteritis in Babylon province is warranted. Children complained of diarrhea with rotavirus infection detected in their stool were involved in the study. The age range was 10 months to 60 months and with retrogradechecking of rotavirus vaccine history. Rotavirus genotypes were detected by reverse transcription-polymerase chain reaction (RT-PCR).A total number of 40 children with rotavirus gastroenteritis were used to examine the rotavirus genotyping distribution. The prevalent genotypes were found to be G1, G9, and G2. No significant difference in the distribution of the length of diarrhea according to genotype. Vaccinated children exhibited significantly higher percentage of G2 while G1 and G9 were presented more considerably in not vaccinated children.We detected a variety of rotavirus strains includingthe major global genotypes.Obviously, rotavirus strains are continuing to vary in Iraq. The vaccination changes the genotype prevalence and this situation may create challenges to the effectiveness of rotavirus vaccines and planning for future polices. Keywords: Rotavirus, Vaccine, Genotype.

Features of the intestinal microbiota functional status in early-aged children with rotavirus infection

The aim is to assess the intestinal microflora functional and structural disorders in early-aged children in the dynamics of rotavirus infection by studying intestinal metabolites in faeces – short-chain fatty acids (SCFA). Materials and methods. The study included 60 breastfed children aged 1-24 months with rotavirus infection (the study group) and 30 healthy children, representative by age and sex (the comparison group). Determination of SCFA (acetate, propionate, butyrate) in faeces was carried out in all children of the study group three times in the dynamics of the disease (on the 3rd, 5th and 10th day) and in healthy children once. Results. The total concentration of SCFA in children with rotavirus infection was 3 and 2.2 times lower than in healthy children in the acute period of the disease (p<0.01 on the 3rd and 5th day, respectively), increasing on the 10th day (p<0.05), however, not reaching the normal level (p<0.01). The decrease in the total pool of SCFA occurred due to all volatile acids (C2, C3, C4), the concentrations of which were lower than in healthy children (p<0.01). Violation of the volatile acids ratio in their general pool was observed from the first days of rotavirus gastroenteritis in the form of an increase in the C2 relative concentration (p˂0.05) and a decrease in C3 and C4 profiles (p˂0.05). Correspondingly, a decrease in anaerobic index was noted. It was equal to 0.04 [0.01; 0.11] on the 3rd and 5th day of the disease, constituting only 1/5 of the healthy children values (p˂0,01), increasing on the 10th day to 0,09 [0,02; 0.17], however, remaining twice as lower than in children of the comparison group (p˂0,01). Conclusions. There is a violation of the intestinal microflora functional condition in early-aged children from the first days of rotavirus infection, which is expressed by depletion of the total pool of SCFA and concentrations of each of them, as well as structural disorders of intestinal microbiocinosis in the form of reducing its anaerobiosis. These changes are most pronounced during the first five days of rotavirus gastroenteritis and last up to 10th day of illness.

1493Trends of Rotavirus Gastroenteritis during a Conflict Time, Yemen, 2014-2019

Background The Rotavirus Gastroenteritis (RVG) is a contagious vaccine-preventable disease that contributes to the high morbidity and mortality among under 5 children. In Yemen, Rotavirus Surveillance System (RVS) was launched in 2007 as sentinel surveillance and the vaccine was introduced in 2012. However, the current protracted conflict led to a significant breakdown of health services including immunization and water, sanitation and hygiene. The aim is to describe the pattern of RVG during the conflict time: 2014-2019. Methods 2014-2019 RVS data that covers demographic variables, clinical symptoms, vaccination status and laboratory results were analyzed using Epi.info 7.2. Results 6,663 suspected RVG cases were reported. The most affected age group was 9-12 months and cases were higher among males (59%). RVG shows a seasonal pattern where RVG was predominantly reported in the cold season. Only 24% needed admission due to severe dehydration. Only 65% of cases were vaccinated, of them 85% received two doses. The case fatality rate was 1.1%, and was significantly higher among unvaccinated (1.8 vs. 0.6%, P &lt; 0.0001). Of the 5,875 samples collected, only one third found positive to Rotavirus where the predominant genotypes were G12 P [8] and G 2 P [4]. Conclusions The findings highlight that RVG is still an ongoing cause of morbidity among under 5 children in Yemen that upsurges with the low Rotavirus immunization coverage. Therefore, boosting immunization coverage together with other diarrhea prevention strategies are required. Furthermore, ongoing surveillance is important to monitor the RVG epidemiology and to evaluate vaccine effectiveness against the currently circulating genotypes. Key messages It is First research about rota that done in Yemen during conflict so it gives opportunity for future increased scientific rigor, outcomes-focused research, and health informatics. It provides policy makers by recommendation for improving public health and surveillance system during crisis.

Detection and Clinical Implications of Monovalent Rotavirus Vaccine-Derived Virus Strains in Children with Gastroenteritis in Alberta, Canada

Background: While rotavirus vaccine programs effectively protect against severe rotavirus gastroenteritis, rotavirus vaccine strains have been identified in the stool of vaccinated children and their close contacts suffering from acute gastroenteritis. The prevalence of vaccine strains, the emergence of vaccine-derived strains and their role in acute gastroenteritis are not well studied. Methods: We developed a Locked Nucleic Acid Reverse Transcription real-time PCR assay (LNA-RTqPCR) to detect the monovalent rotavirus vaccine (RV1) Rotarix non-structural protein 2 in children with acute gastroenteritis and healthy controls and validated it using sequence confirmed RV1 strains. The association between RV1-derived strains and gastroenteritis was determined using logistic regression. Results: The new assay exhibited 100% (95%CI: 91.7%, 100%) diagnostic sensitivity and 99.4% (95%CI: 96.2%, 100%) diagnostic specificity, with a detection limit of 9.86 copies/reaction and qPCR efficiency of 99.7%. Using this assay, we identified the presence of RV1-derived NSP2 sequences in 7.7% of rotavirus gastroenteritis cases and 98.6% of rotavirus positive healthy children (94.4% had previously received the RV1). Among gastroenteritis cases, those whose stool contained RV1-derived strains had milder gastroenteritis symptoms compared to that of natural rotavirus infections. We observed no significant association between RV1-derived strains and gastroenteritis (OR 0.98; 95% CI 0.60, 1.72). Conclusion: Our study demonstrated that the new assay is suitable for monitoring RV1-derived rotavirus strain circulation and that the RV1-derived strains are not associated with development of gastroenteritis symptoms.

Etiological and Pathomorphological Investigations of Coronavirus and Rotavirus Gastroenteritis in Goat Kids and Lambs

The aim of the performed field and laboratory investigations was to determine the commonest enteropathogens in neonatal and juvenile lambs and goat kids, as well as induced macro- and microscopic alterations in the different digestive system compartments. The study comprised a total of 850 newborn and juvenile lambs (600) and goat kids (250) from 9 private dairy farms (3 goat farms, 6 sheep farms). The age of animals was from 24 hours to 20 days. The following rapid antigen detection tests were used: (Rainbow calf scour 5 BIO K 306, Monoclonal Antibody anti-Coronavirus аnd Rotavirus FITC conjugated, BIOX Diagnostics, Belgium). Gross anatomy and histopathological examination of tissue samples was performed on 21 carcasses (9 goat kids and 12 lambs) from animals that died with signs of gastroenteritis. The main detected agents of intestinal infections were Cryptosporidium parvum, rotaviruses, coronaviruses and Escherichia coli.