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WEST BENGAL STATE AIDS PREVENTION AND CONTROL SOCIETY Presented by: Dr. N Deb, Dy. Director Surveillance PowerPoint Presentation
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WEST BENGAL STATE AIDS PREVENTION AND CONTROL SOCIETY Presented by: Dr. N Deb, Dy. Director Surveillance. SENTINEL SURVEILLANCE IN WEST BENGAL 2005. Definition.

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WEST BENGAL STATE AIDS PREVENTION AND CONTROL SOCIETYPresented by: Dr. N Deb, Dy. Director Surveillance

SENTINEL SURVEILLANCE IN WEST BENGAL 2005

definition
Definition

HIV surveillance can be defined as “A collection of epidemiological information of sufficient accuracy and completeness regarding the distribution and spread of HIV infection to be relevant to the planning and implementation of HIV / AIDS prevention and control programme activities”.

objectives
Objectives
  • Determine the geographical spread of HIV infection
  • Monitor the trends of HIV epidemic
  • Know the prevalence of the infection in high risk group like Sexually transmitted disease (STD) clinic attendees
  • Measure the prevalence of the HIV infection in the general population through testing the antenatal clinic attendees.
  • Measure the prevalence of the infection in the targeted intervention groups of Female Sex Workers (FSW), Men Having Sex with Men (MSM) & Injecting Drug Users (IDU)
  • Provide information for estimates and future projections of HIV/AIDS in the country;
  • Use such data to mobilize the national political and social leaders as well as to generate external support for the programme;
  • Provide useful data for appropriate planning of health and medical care services
site selection sample size anc std fsw idu msm sites
Site Selection & Sample Size: ANC, STD, FSW, IDU & MSM Sites

Sites were selected considering the different geographical locations, high risk populations & low risk populations

  • 400 samples collected from each ANC sentinel site in a period of 3 month- Sentinel group is the ANC attendees / pregnant women attending the clinic for the first time during this period.
  • In the case of STD clinic the sample size is 250 of them 150 from STD clinic & 100 from Gyno clinic of same institution.
  • 250 samples collected from identified TI clinic for FSW, IDU, MSM in a period of 3 months- sentinel groups are FSW, IDU, MSM.
  • Samples were collected (a) Maintaining consecutiveness, (b) Following inclusion criteria.
  • Testing done at (a) Pre-designated testing centers at Microbiology/ Virology units of teaching institutions in a unlinked anonymous manner.
sentinel sites
Sentinel Sites
  • 1998 (R-1): 6 Sites (3ANC+3STD)
  • 1998 (R-2): 8 Sites (4ANC+4STD)
  • 1999 (R-3): 8 Sites (4ANC+4STD)
  • 2000 (R-4): 9 Sites (4ANC+5STD)
  • 2001 (R-5): 14 Sites (8ANC+6STD)
  • 2002 (R-6): 19Sites(9ANC+9STD+1IDU)
  • 2003 (R-7): 27 Sites(9ANC+10STD+1IDU+7FSW)
  • 2004 (R-8): 28 Sites (9ANC+10STD+1IDU+7FSW+1MSM)
  • 2005 (R-9): 33 Sites (9ANC+12STD+4IDU+7FSW+1MSM)
new std idu sites 2005
New STD & IDU Sites-2005

STD Sites:

  • Hoogly DH
  • Medinipur Medical College & Hospital

IDU Sites:

  • SCIR-Siliguri
  • SCIR-Lalgola
  • Kripa Foundation-Darjeeling
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ANC

STD

FSW

IDU

MSM

Sentinel Surveillance Sites:2005

anc sites 2005 no of sites 9 sample tested 3238 found positive 29 percentage prevalence 0 90

ANC Sites-2005No. of Sites-9Sample Tested-3238 Found Positive -29Percentage Prevalence-0.90%

std sites 2005 no of sites 12 sample tested 2511 found positive 62 percentage prevalence 2 47

STD Sites-2005 No. of Sites-12 Sample Tested-2511 Found Positive -62 Percentage Prevalence-2.47%