Record Details

Epidemiological and genetic characterization of larval stages of Fasciola gigantica in snail intermediate hosts in Karnataka, India

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Epidemiological and genetic characterization of larval stages of Fasciola gigantica in snail intermediate hosts in Karnataka, India
Not Available
 
Creator Rajanna R
Thimmareddy PM
Sengupta PP
Siju SJ
Mamatha GS
 
Subject Fasciola gigantica
ITS-2
genetic characterization
snail
 
Description Not Available
Fasciolosis in ruminants in India is caused by the liver fluke Fasciola gigantica. Radix (Lymnaea) spp. are known to carry the infective stages of this parasite. Understanding the seasonal prevalence of F. gigantica infection in the intermediate host is of extreme importance in order to elucidate the transmission dynamics of the parasite. So the present study was designed to determine the bioclimatic distribution of larval stages of F. gigantica in Radix spp. snails as well as to explore the genetic diversity of F. gigantica in three geographical regions (Deccan plateau, Western Ghats and coastal region) of Karnataka. The lymnaeid snails were sampled (n = 2077) for a period of one year (June 2015 to May 2016) at 24 sites. The snails were morphologically identified and the infection status was established through cercarial shedding and nested polymerase chain reaction (PCR) based technique targeting second internal transcribed spacers (ITS-2) of nuclear ribosomal DNA. The sensitivity of PCR (8.2%) for detection of F. gigantica infection within snail is significantly higher than cercarial shedding (4.3%) with an overall prevalence of 5.1%. The prevalence of infection was higher in winter than in the rainy and summer seasons (6.2% instead of 4.6% and 4.3% respectively). Deccan plateau (5.8%) showed a higher prevalence of infection compared to Western Ghats (5.2%) and Coastal region (3.6%). The sequencing ITS-2 region permitted the identification of the parasite as F. gigantica which is having high implication in studying the population genetic structure of the parasite in the country. In conclusion, overall results indicated that Radix spp. snails harboured F. gigantica developmental stages throughout the year and nested PCR was found to be sensitive and specific for detection of F. gigantica infection in snails compared to routine parasitological techniques.
Not Available
 
Date 2019-05-25T11:13:57Z
2019-05-25T11:13:57Z
2018-07-04
 
Type Research Paper
 
Identifier Not Available
1230-2821
http://krishi.icar.gov.in/jspui/handle/123456789/19872
 
Language English
 
Relation Not Available;
 
Publisher Springer publishers