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|Year : 2003 | Volume
| Issue : 2 | Page : 115--117
A hospital based study of Hepatitis E by serology
B Mishra, H Srinivasa, S Muralidharan, S Charles, RS Macaden
Department of Microbiology, St. John's Medical College, Bangalore - 560034, Karnataka, India
Department of Microbiology, St. John«SQ»s Medical College, Bangalore - 560034, Karnataka
Hepatitis E virus is recently recognised as an important cause of non-A, non-B hepatitis. A total of 569 serum samples were screened for HEV between April 1997 and March 2000, by a commercially available HEV IgM capture ELISA. The diagnosis was invariably acute viral hepatitis for differential diagnosis of jaundice. The percentage of seropositivity was found to be 18.8% in confirmed Hepatitis E cases.
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Mishra B, Srinivasa H, Muralidharan S, Charles S, Macaden R S. A hospital based study of Hepatitis E by serology.Indian J Med Microbiol 2003;21:115-117
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Mishra B, Srinivasa H, Muralidharan S, Charles S, Macaden R S. A hospital based study of Hepatitis E by serology. Indian J Med Microbiol [serial online] 2003 [cited 2020 Aug 5 ];21:115-117
Available from: http://www.ijmm.org/text.asp?2003/21/2/115/7987
Hepatitis E Virus (HEV) is now recognised as an important cause of enterically transmitted non-A non-B viral hepatitis. Several reports are available in India about well-characterised HEV cases, which are mainly about large- scale epidemics in communities.,,, However, information about the clinical and epidemiological characteristics of HEV cases which may be either from epidemic source or sporadic in origin are scanty in India., The present study aims to i) determine the occurrence of specific IgM antibodies to HEV in clinical cases of hepatitis, ii) study the outcome of infection with hepatitis E in pregnant women and iii) correlate co-existing liver conditions in confirmed hepatitis E cases.
Materials and Methods
A total of 569 patients seen at out-patient department or hospitalised with diagnosis of hepatitis at St. John's Medical College Hospital, Bangalore were included. The study was carried out between April 1997 and March 2000. Three to five millilitre of blood was collected from the patients. IgM antibodies to HEV was detected employing a commercially available ELISA (Gene lab diagnostics, Singapore). Case records of all the HEV IgM antibody positive cases were reviewed to determine the association of HEV infection with pregnancy and co-existing clinical conditions. The serological status for other hepatitis viruses namely HBV (HBs Ag, Anti HBc IgM, HBe Ag), HCV antibodies and HAV IgM antibodies were reviewed. Liver function tests and histopathology of liver biopsies were also studied in those patients.
Out of 569, 107 serum samples were positive for HEV IgM. The case fatality rate was 4/107 (3.75%). The clinical profile of these patients are shown in [Table:1].
Among the seropositives, 72 were males and 35 were females (male:female ratio = 1.9: 1). Thus a male preponderance was noted. Age specific distribution of IgM serogpositivity is shown in [Table:2]. Seropositives to HEV were noted in all age groups. But 11-20 age group had less sero-positivity than other age groups (p value et al, Khuroo, Panda et al, have convincingly demonstrated that HEV is an important cause of Non-A Non-B viral hepatitis. Epidemic and point source out breaks are common in rainy season when flooding leads to sewage contamination of drinking water. Our data fits with the existing epidemiological features of HEV in endemic areas. Occurrence of HEV specific IgM was noted in 18.8% of serum samples [Table:2]. Male preponderance was noted. The youngest person seropositive was aged 2 years and the oldest case was 67 years. Thus all age groups were susceptible to hepatitis E infection. However, adults (over 20 years ) recorded more sero-positives than adolescents and children [12% Vs 20.5% ; P valueSalmonella typhi. These features probably suggest either food or water as a common vehicle for disease transmission.
In summary, HEV was an important cause of acute, subacute hepatitis in this part of India. The study revealed many typical epidemiological characteristics reported in the literature. Around one third of hepatitis E cases also had other infectious and non-infectious diseases as associated clinical conditions. More studies are needed to understand these associations and their impact on course of the disease.
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