Preventing TB is a critical cog in the wheel to #endTB and #endAIDS. By Bobby Ramakant

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 Every case of active tuberculosis (TB) disease comes from an individual with latent TB infection. And every new case of latent TB infection is a sign of failing infection control, as someone with active TB disease transmitted the bacteria to an uninfected person. Quarter of world's population has latent TB. TB continues to be the most common opportunistic infection among people living with HIV, and also, the lead cause of death. With TB being preventable, treatable and curable, we need to do a lot more to make this slogan a reality.

In addition to boosting infection control, scientific evidence is piling up that TB preventive therapy should be a standard of care to protect people (with latent TB) from active TB disease.

 Hundreds of participants who attended the TB HIV Symposium organized by Stop TB Partnership with partners, before the 10th IAS Conference on HIV Science (IAS 2019) opened in Mexico, echoed a strong Call To Action to reach out to 6 million people living with HIV with TB preventive treatment.

 People living with HIV but dying of TB

 According to the last WHO Global TB Report, 300,000 people living with HIV died of TB in 2017. "TB is the biggest killer among people living with HIV. We cannot reduce the mortality among people living with HIV without addressing TB. It is very important for people who are working with HIV national programmes and partners to increasingly focus their attention on TB. In the past TB-HIV interface area has been dominated by significant work from the TB programme, and I must say, not so much from the HIV programme. But now things are changing" said Dr Suvanand Sahu, Deputy Executive Director, Stop TB Partnership.

Benefits of TB preventive TB therapy have been known since 60 years. Till recently, there has been very limited scale up, even in the target group such as people living with HIV. In September 2018 at the United Nations (UN) General Assembly, a special UN High Level Meeting (UNHLM) on TB was attended by heads and representatives of several countries globally. Promises made at this UNHLM gives hope for stronger response towards ending TB.

 "We have a UNHLM target of putting 30 million people on TB preventive treatment, which includes specific goal of putting 6 million people living with HIV (PLHIV) on TB preventive therapy. PLHIV come in regular contact with HIV programmes to receive their anti-retroviral therapy so it is very important for HIV programmes to prioritise provision of TB preventive therapy. TB preventive therapy significantly reduces the risk of getting active TB disease. It is a standard of care as every person who is offered HIV care should also be offered TB preventive therapy (after ruling out active TB disease and any other contraindications). We have lagged behind in this aspect of TB-HIV collaborative activities that are needed and now there are great opportunities with the UNHLM target to make progress in this area" said Dr Sahu in an interview with CNS (Citizen News Service, www.citizen-news.org).

 "TB preventive therapy is not the only activity that involves TB and HIV programmes to collaborate and work synergistically, as there are many other areas too. It is very important that right at the start of the HIV conference we get reminded that TB is the biggest killer among people living with HIV and there are tools, interventions, that are available that needs to be scaled up to prevent people living with HIV from dying from TB" emphasized Dr Sahu.

Call to action on preventing TB launched at IAS 2019

 Noted human rights activist and South Africa based HIV advocate from Global Network of People Living wih HIV, Wim Vandevelde, shared a Call To Action, for a coordinated HIV and TB response to reach 6 million people living with HIV with tuberculosis preventive treatment.

 This robust Call To Action, is reproduced here: "TB is not only treatable and curable but also preventable. Successful interventions over the past 50 years provide compelling evidence that ending the epidemic is feasible and achievable. The 2018 UNHLM on TB provide a historic and opportune moment for the global community to put the TB response back on track. It reminded us that ending the epidemic requires tackling broader health risk factors and determinants of the disease, in addition to traditional biomedical responses.

 Today, with the advent of newer and more effective options, the scale-up of TB preventive treatment has become a cornerstone in the effort to avert TB morbidity and mortality. This was recognized by the UNHLM Declaration, which announced its ambitious goal to prevent TB in "at least 30 million people, including 4 million children under five years of age, and 6 million people living with HIV by 2022." We, the participants, gathered at the 'TB/HIV 2019 Symposium' held on 20 July 2019 in Mexico City, recognize that a new era in TB prevention is upon us. As representatives of the TB and HIV communities, we commit to push for a renewed TB/HIV public health paradigm and to advocate for the protection of people living with HIV so that no one dies of TB.

 We call upon all UN Member States, organizations of the UN system, inter-governmental and non-governmental organizations, the corporate sector, foundations, donors, national governments and the international community to promote enabling environments that reduce the burden of TB among people living with HIV by scaling up TB treatment and prevention.

 Therefore, we advance the following five actions that stakeholders can undertake in order to eliminate TB in people living with HIV:

 1. Sustain the necessary funding for both TB and HIV: Increasing the momentum of the TB and HIV response by urging leadership from political, religious and civil society leaders at all levels to approach expenditure in health as an investment that will generate value to their societies and economies.

 2. Galvanize stakeholders at all levels to ensure access to TB and HIV services and models of care that have affected individuals and communities at their core: Prioritising multi-stakeholder and coordinated HIV and TB responses as the driver for a reformed public health paradigm. Implementing evidence-based interventions, rolling out prevention services and consolidating health services towards universal health coverage. Together with HIV treatment, preventive therapy can reduce the risk of TB disease in people living with HIV by up to 90%.

 3. Accelerate research and development of technology innovations, including diagnosis, treatment and vaccines: Dedicating resources, with all high-burden and G20 countries investing a proportion of their Gross Domestic Expenditure will expedite efforts in the research and development of new technologies. This will also rapidly increase the uptake of new tools to prevent and treat TB and HIV.

 4. Decrease the burden of combined HIV and TB stigma: Ensuring that national programmes strike a balance between standardized public health responses and innovative solutions to better support the realities of the communities and individuals affected by TB and HIV. Honouring the rights of people living with HIV and affected by TB, and decreasing gender-related barriers, stigma and discrimination will go a long way to decreasing vulnerability to TB and HIV in all societies.

 5. Commit to outstanding programmatic performance: Striving for quality and implementing initiatives that are routinely geared, monitored and evaluated towards reaching TB and HIV targets at the country, regional and global levels, including through accountability frameworks."

 Persons with latent TB infection do not feel sick and do not have any symptoms. They are infected with Mycobacterium tuberculosis, but do not have TB disease. Persons with latent TB infection are not infectious and cannot spread TB infection to others. Overall, without treatment, about 5 to 10% of latent TB infected persons will develop active TB disease at some time in their lives. That is why it is a human right and a standard of care that every person with latent TB should get preventive therapy which will drastically reduce the risk of developing active TB disease. Without addressing latent TB and 'emptying latent TB pool', it is not possible to end TB or AIDS.

 (Bobby Ramakant is a WHO Director General’s WNTD Awardee and Health Editor of CNS (Citizen News Service). Follow him on Twitter @bobbyramakant, @cns_health or visit www.citizen-news.org)

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