Sask BCG Discontinuation

Dr. Ibrahim KhanSaskatchewan TB Education Day

28th October, 2011

Overview• Purpose • Background• Criteria for use/discontinuation of BCG• Discussion

Purpose• To provide an overview of the process that lead to the

decision of BCG Discontinuation in the province of Saskatchewan including on the First Nations reservations

Background• The protective effect of BCG vaccine against TB meningitis and

miliary TB in children has been well documented (86%).• BCG protective effects against pulmonary tuberculosis are

inconsistent ranging from 0% to 80%• BCG does not prevent primary infection or reactivation of latent

pulmonary infection. • In summary, the impact of BCG vaccination on community

transmission of TB is very limited.

Background (continued….)

• BCG can cause disseminated BCG in children with underlying immunodeficiency.

• The estimated rate of disseminated BCG infection in First Nations and Inuit populations in Canada greatly exceeding global estimates.

• BCG vaccine has become a barrier to investigation of TB transmission after contact with TB case and effective use of preventive therapy.

• Prior to 2003, the majority of FN newborns living on reserve were offered BCG vaccine however the uptake of vaccine in some communities were zero or very low.

Background (continued….)

• In 2003 FNIHB held a national forum “strengthening the Tuberculosis Control Program” with a focus on use of BCG and other preventive program components. The key conclusions:

– engaging FNs in any BCG policy changes – taking cautious approach for implementing BCG discontinuation (on a

community by community basis and based on epidemiology of TB in each community)

– considering the IUATLD criteria for discontinuation of BCG

– strengthen the overall TB control program including enhanced TB screening programs.

History of BCG Discontinuation in Saskatchewan

• Oct 2005: Based on the IUATLD criteria, TBC and FNIH sask region decided to discontinue BCG in 27 First Nations communities in the south

• The decision included the commitment to annually review of TB epi (e.g., paediatric meningitis cases/ infectious cases in the communities), to enhance screening and aggressive contact trace in the communities

• January 2011 PAPHR decided to discontinue BCG• TBC, FNIH, Ministry and Northern Health regions had series of

focused meetings and epidemiological reviews to assess the situation and look at the practice of BCG in the rest of the Province.

What is currently happening in terms of BCG practice?

Current practice of BCG in FN communities

BCG discontinued BCG is used

Atl 33 0

QC 27 0

ON 104 32

MB 2 62

SK All since Sept 11 0

AB 43 2

BC 201 0

Total 437 (73%) 159 (27%)

Report on Impact of the First Nations Inuit Health Branch Policy Direction Change with regards to Use

of BCG Vaccine in FN communities

Ezzat Farzad MD, MSc, FRCPCDennis Wardma MD, FRCPC,

Office of Community Medicine, FNIHB, Health Canada

Meeting of Aboriginal Sub-Committee of CTC October 8, 2010

Impact of BCG Discontinuation

Purpose• The primary purpose of this report is to examine the impact

of the 2003 changes to FNIHB policy on use of BCG vaccine

Criteria for discontinuation of BCG (IUATLD)

• average annual notification rate of smear-positive pulmonary TB cases below 5 per 100,000 or less during the previous three years; or

• average annual notification rate of tuberculosis meningitis in children aged under five years below 1 per 10 million general population during the previous five years; or

• average annual risk of tuberculosis infection below 0.1% or less

Criteria for use of BCG (NACI)• BCG vaccine may be considered for infants in First Nations and Inuit

communities or infants residing among groups of persons with:

– an average annual rate of smear-positive pulmonary TB greater than 15 per 100,000 population (all ages) during the previous 3 years; or

– an annual risk of TB infection greater than 0.1%

if early identification and treatment of TB infection are not available.

Indicators used for FNIHB study

• 3-years average annual rates of smear-positive pulmonary TB for all ages per 100, 000 population (IUATLD and NACI targets)

• 5-year average annual rate of TB meningitis among children under 5 years of age per 10 million general population ( IUATLD target)

• miliary TB among children under 5 years of age per 100,000 population

• Data for annual rate of TB infection” post BCG discontinuation was not available.

Source of information

• CTBRS (for smear positive pulmonary and miliary TB)• FNIH regional data (for TB meningitis)• personal communications.

Results: Number of cases and rates (per 100,000) of TB meningitis, FNs on reserve

2000 2001 2002 2003 2004 2005 2006 2007 2008 Average rate 2004-2008

Bellow IUATLD Criteria

AB 0 0 0 0 0 0 0 0 0 0 Yes

BC 0 1(15.9) 0 0 0 0 0 0 0 0 Yes

ON 0 0 0 0 0 0 0 0 0 0 Yes

QC 0 0 0 0 0 0 0 0 0 0 Yes

SK 1(12.0) 0 0 0 0 0 0 0 0 0 Yes

Total 0 1(2.0) 0 0 0 0 0 0 0 0 Yes

Discussion

• No case of children meningitis has been reported for on-reserve FN children (5 years old or younger) during 2004-2008 (i.e. after discontinuation of BCG)

• The discontinuation of BCG in on-reserve FN communities has not resulted in an increase in the smear positive rates in most regions.

Conclusion and Recommendations

Given that BCG vaccine has very limited impact on community transmission of TB and TB control in general, and in light of favourable qualitative and quantitative reviews of the impact of the BCG discontinuation in most regions, it is recommended that the Branch and the regions continue in this direction with the following considerations:• enhanced surveillance system to enable further monitoring

of BCG discontinuation• continuation of an effective TB program that includes early

case finding, case management, contact tracing, surveillance, screening and etc.

• For regions who have smear positive rates higher than IUATLD criteria or are showing an increasing trend after BCG discontinuation, effective screening programs are required to protect children.

Saskatchewan Decision on BCG Discontinuation 2011

• Evidence base for optimal use of screening programs in children is weak and indeed the Canadian standards acknowledge that “The optimal design of such screening programs is being investigated.”

• This is further evidenced by wide variation in the way screening is delivered in different Provinces in Canada, particularly in relation to the ages when children are tested

In sask we are endorsing aggressive approach to contact tracing ensuring at least • Thorough identification of contacts• Identification and prioritisation of the vulnerable • Identify those needing sputum samples, CXRs• TBC assess within a month those needing assessment• Priority not just to completion of treatment of active TB,

but timely assessment, initiation and completion of treatment of LTBI when indicated, especially in children.

Saskatchewan decision

Recommendation of Sask TBWGFor Screening 2011 / 2012

• Age 1 and 2 in high risk northern communities identified by NITHA

• School Entry all children in Saskatchewan First Nations and northern communities (within the 3 northern health regions/authorities)

• Grade 7 all children in Saskatchewan First Nations and northern communities (within the 3 northern health regions/authorities)

• In FNIH areas (south central) screening all children in Kindergarten, grades 2 ,4 ,6 , and subject to annual epi review

• Develop monitoring framework that present results by community and include:

• Numbers screened compared with population. denominator ( children age 1-4 and class size)

• TST positive requiring follow up• % requiring follow up seen in clinic• Numbers identified positive for latent or active TB• status of those TST+

Moving forward with TB program in sask

Moving Forward

*Additional resources been provided to Northern FNs for enhanced screening and contact tracing

*One robust and aggressive screening plan for all

*focus on enhanced education and awareness in the communities

POPULATION HEALTH BRANCH

Thanks for Your attention

Questions???