ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
A. Sujhithra1 , S. Jayanthi2, M. Chokkalingam3, D. Danisvijay4, R. Vidhya5 and Sanjay Andrew Rajaratnam6
1Faculty of Allied Health Sciences, Department of Cardiology, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam – 603103, Tamil Nadu, India.
2Department of Microbiology, Panimalar Medical College Hospital & Research Institute, Varadhrajapuram, Poonamallee, Chennai – 600 123, Tamil Nadu, India.
3Department of Cardiology, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam – 603 103, Tamil Nadu, India.
4Department of Microbiology, Karpaga Vinayaga Institute of Medical Sciences and Research Center. P.O, GST Road, Chinna Kolambakkam, Palayanoor, Maduranthakam – 603 308, Tamil Nadu, India.
5Department of Microbiology, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam – 603 103, Tamil Nadu, India.
6Department of Physiology, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research and Education (CARE), Kelambakkam – 603 103, Tamil Nadu, India.
J Pure Appl Microbiol. 2022;16(2):1028-1038 | Article Number: 7460
https://doi.org/10.22207/JPAM.16.2.27 | © The Author(s). 2022
Received: 24/11/2021 | Accepted: 23/03/2022 | Published online: 17/05/2022
Issue online: June 2022
Abstract

Streptococcus pyogenes is a gram positive pathogen causing pharyngitis, mild infections to chronic complications (Rheumatic Heart Disease, RHD). In this study, echocardiographic and clinical profile in pharyngitis, rheumatic fever patients were compared with virulent genes emm, spe A, spe B and sof. Nearly 107 subjects were classified into Group I – Pharyngitis (n=30), Group II – Rheumatic Fever (n=30) and Group III – healthy controls (n=47). The isolated S.pyogenes from Group I and Group II patient’s throat swab were subjected to 16S rRNA gene sequence. Multiplex PCR was done for identification of virulent genes. Electrocardiogram and Echocardiography was done for all the groups. For statistical analysis ANOVA and t-test were used. Comparison between groups were done by Tukey’s Multiple Comparison test. Among 107 isolates, 16.7% emm gene were detected in Group I and 23.3% in Group II, 56.67 % of spe B in Group I and 73.33 % in Group II, 36.67% of sof gene in Group I and 40% in Group II. Mitral Regurgitation was most commonly encountered in rheumatic fever. Hemoglobin (<0.001) and RDW (<0.001) was significantly lower in Rheumatic Fever whereas Platelet count (<0.001) and Neutrophil (<0.001) was significantly higher when compared with control subjects by Tukey’s Multiple Comparison test. When we compared the genetic relationship with the Echocardiographic findings, presence of one, two or three genes showed moderate to severe regurgitation in Rheumatic Fever subjects.

Keywords

Pharyngitis, Rheumatic Fever, Virulent genes (emm, spe A, spe B, sof), 16S rRNA sequence, carditis

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