Aim: To study the prevalence of bacterial flora in the Hanuman langur (Presbytis 
entellus) of the Gujarat state. Materials and Methods: Thirty hanuman 
langur (Presbytis entellus) (20 male and 10 female), were screened for bacterial 
flora during the period of June, 2010 to March, 2011. Hanuman langur (Presbytis 
entellus) were screened by culture of nasal, oral and rectal swabs during 
routine health monitoring and samples incubated using appropriate media and 
specific selective culture methods. Bacterial organisms from the normal as well 
of affected with various diseases and disorders conditions viz. infected wound, 
electric shock, road accident, jaw injury, stomatitis, respiratory infection and 
diarrhea were subcultured and identified for genus and species. Results: 
Significant normal pathogens of the nasal and oral swabs were found mainly 
Staphylococcus spp., Streptococcus spp., Klebsiella spp., and Proteus spp. 
whereas from the rectal swabs of hanuman langur the significant pathogen noted 
were Staphylococcus spp., Streptococcus spp., E. coli spp., Salmonella spp., 
Proteus vulgaris spp., Klebsiella spp. and Shigella spp. The serotypes of E.coli 
isolated from rectal swabs of hanuman langur were identified as rough type, O138 
and O20. The major antigenic structure of E. coli revealed O138 (10), O20 (6) 
with rough types (2). Out of the total 10 cases of diarrhea O138 was observed 
from five isolates while O20 recorded from 3 cases. Out of remained two isolates 
one isolate of diarrhea revealed rough type and one revealed non typing 
antigenic structure. 
              
              Conclusion: The bacteriological prevalence in 
healthy and infected hanuman langurs in Gujarat reported for the first time in 
the current study may serve as a guideline for future studies in the same 
species. 
              
              Keywords: bacterial flora, Hanuman langur, nasal swab, oral 
swab, rectal swab