Working Groups

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Antimicrobial therapeutic guidelines from leading experts including ISAC's ICU & Sepsis Working ...

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Current Officers

D Fisher


Dale Fisher


Geneve Allison


Mark Gilchrist

All Members

David Allen (USA)
Tony Allworth (Australia)
Sophia Archuleta (Singapore)
Timothy Barkham (Singapore)
Rosmonaliza Binti Hj Awang Asli (Brunei)
Andrew Burns (New Zealand)
Monica Chan (Singapore)
Jacky Man Chun Chan (Hong Kong)
Keat Choong (Australia)
Chia Yin Chong (Singapore)
Ying Ying Chua (Singapore)
Leyland Chuang (Singapore)
Nick Collins (Australia)
Ann-Marie Crozier (Australia)
Pauline Dobson (Australia)
Chris (Christina) Drummond (Australia)
John Dyer (Australia)
Sharon Erdman (USA)
Richard Everts (New Zealand)
Kate Grimwade (New Zealand)
Krispin Hajkowicz (Australia)
Ryota Hase (Japan)
Christopher Heath (Australia)
Lanny Hsieh (USA)
Anthony Kwan Fu Htin (Australia)
Paul Ingram (Australia)
Mei Ling Kang (Singapore)
Sushila Kataria (India)
Sara Keller (USA)
Anna Klusak (Australia)
Yat Wah Kwan (Hong Kong)
Katy Lai (Australia)
Yee Sin Leo (Singapore)
Chi Wai Leung (Hong Kong)
Peter Leung (Australia)
Wai Shing Leung (Hong Kong)
Raymond Lin (Singapore)
Moi Lin Ling (Hong Kong)
Ryan Llorin (Singapore)
David Looke (Australia)
Mark Lowenthal (Australia)
David Lye (Singapore)
Carol Mackrow (Australia)
Matthew Malone (UK)
Catherine Marshall (Australia)
Abel Mujal Martinez (Spain)
Kate McCarthy (Australia)
David McDougall (Australia)
Alistair McGregor (Australia)
Sara Metcalf (New Zealand)
Eavan Muldoon (UK)
Miki Nagao (Japan)
Dilip Nathwani (UK)
Tat Ming Ng (Singapore)
Hien Huy Nguyen (USA)
Helen Oh (Singapore)
Gabrielle O’Kane (Australia)
Jolene Oon (Singapore)
Sanjay Patel (UK)
Geoff Playford (Australia)
James Pollard (Australia)
Victor J. Gonzalez Ramallo (Spain)
Andrew Seaton (UK)
Marjoree Sehu (Australia)
Sanjaya Senanayake (Australia)
Benedict Sim (Kuala Lumpur)
Daniel Stefanski (Australia)
Archana Sud (Australia)
Zuraidah Sulaiman (Singapore)
Subramanian Swaminathan (India)
Ban Hock Tan (Singapore)
Rachel Taylor (Australia)
Colleen Terriff (USA)
Koh Cheng Thoon (Singapore)
Adrienne Torda (Australia)
Joseph Tsang (Hong Kong)
Owen Tsang (Hong Kong)
Stefania Vergnano (UK)
Namita Warrior (Australia)
Patricia Weatherill (USA)
Sally Wong (Hong Kong)
Sin Yew Wong (Singapore)
Siang Fei Yeoh (Singapore)
Ilan Youngster (Israel)
Lihua Zhong (Singapore)

How to Join

Members of an ISAC Member Society are eligible to join any of our Working Groups. If you are a member and would like to join this group, please contact Fee Johnstone, ISAC Executive Assistant at

Aims and Objectives

Outpatient parenteral antibiotic therapy (OPAT) is a system of care which facilitates early hospital discharge or even completely prevents admission. It began in 1974 in paediatric patients in the US. Since then the UK, Australia, New Zealand and Canada, as well as countries in Europe, South America and Asia, have institutionalised this mode of care. There are a variety of clinical and funding models each for the same endpoint. It is proven to be safe and cost beneficial. OPAT improves the quality of patients’ lives by providing treatment in a preferred setting and facilitates an earlier return to work or school. It may also lower patients' risk of acquiring healthcare-associated infections. More recently it has been seen as a tool for antimicrobial stewardship.

The aims of the Working Group are:

  • To foster the international exchange of ideas with regards to service models, benchmarking and multicenter research into all aspects of OPAT
  • To support the implementation of OPAT in countries seeking its establishment
  • To encourage collaborative research on OPAT especially for clinical trials

Our Work Plan: 

  • Write to the Infectious Diseases Society of America (IDSA) for focal points in the US
  • A point prevalence survey on activity worldwide
  • Symposia within conferences
  • Dedicated conference
  • Journal supplements
  • Multicenter trials
  • Engaging industry
  • Training products for individuals


Projects / Publications

OPAT Taiwan meeting 2017 and 2018 workplan
Effectiveness and safety of outpatient parenteral antimicrobial therapy in acute exacerbation of chronic obstructive pulmonary disease. Ponce González MA, Mirón Rubio M, Mujal Martinez A, Estrada Cuxart O, Fiuza Perez D et al. Int J Clin Pract. 2017 Dec;71(12).
Successful outpatient parenteral antibiotic therapy delivery via telemedicine. Tan SJ, Ingram PR, Rothnie AJ, Whitmore TJ, Robinson JO et al. J Antimicrob Chemother. 2017 Oct 1;72(10):2898-2901.
Determining the Risk of Sepsis Using Nurse-Compounded Elastomeric Pumps for Continuous Infusion in Outpatient Parenteral Antibiotic Therapy. Dobson PM, Loewenthal M, Harris L. J Infus Nurs. 2017 Sep/Oct;40(5):282-285.
Comparing Injecting Drug Users with Others Receiving Outpatient Parenteral Antibiotic Therapy. Dobson PM, Loewenthal MR, Schneider K, Lai K. Open Forum Infect Dis. 2017 Aug 26;4(4):ofx183.
Costs of outpatient parenteral antimicrobial therapy (OPAT) administered by Hospital at Home units in Spain. González-Ramallo VJ, Mirón-Rubio M, Mujal A, Estrada O, Forné C et al. Int J Antimicrob Agents. 2017 Jul;50(1):114-118.
Outpatient parenteral antibiotic therapy (OPAT) in Asia: missing an opportunity. Fisher D, Michaels J, Hase R, Zhang J, Kataria S et al. Antimicrob Chemother. 2017 Apr 1;72(4):1221-1226.
Intravenous antimicrobial therapy in the hospital-at-home setting: data from the Spanish Outpatient Parenteral Antimicrobial Therapy Registry. Mirón-Rubio M, González-Ramallo V, Estrada-Cuxart O, Sanroma-Mendizábal P, Segado-Soriano A et al. Future Microbiol. 2016;11(3):375-90.
Safety and effectiveness of outpatient parenteral antimicrobial therapy in older people. Mujal A, Sola J, Hernandez M, Villarino MA, Baylina M et al. Antimicrob Chemother. J Antimicrob Chemother. 2016 May;71(5):1402-7.
Safety and effectiveness of home intravenous antibiotic therapy for multidrug-resistant bacterial infections. Mujal A, Sola J, Hernandez M, Villarino MA, Machado ML et al. Eur J Clin Microbiol Infect Dis. 2015 Jun;34(6):1125-33.
A national survey of infectious disease practitioners on their use of outpatient parenteral antimicrobial therapy (OPAT). Muldoon EG, Switkowski K, Tice A, Snydman DR, Allison GM. Infect Dis (Lond). 2015 Jan;47(1):39-45.
Outpatient parenteral antimicrobial therapy (OPAT) in the Republic of Ireland: results of a national survey. Muldoon EG, Allison GM, Gallagher D, Snydman DR, Bergin C. Eur J Clin Microbiol Infect Dis. 2013 Nov;32(11):1465-70.
Experience of Infectious Diseases Consultants with Outpatient Parenteral Antimicrobial Therapy: Results of an Emerging Infections Network Survey. Chary A, Tice AD, Martinelli LP, Liedtke LA, Plantenga MS et al. Clin Infect Dis. 2006 Nov 15;43(10):1290-5.
Expert advisory group (representing 6 countries) formed with Baxter with the intention of developing OPAT in Asia.
Plan to create 2 model sites of OPAT in India. Champions from India to spend time in Singapore OPATs. Visitations to India sites (Chennai and Delhi) planned for April 2016.
Manuscript describing OPAT in Asia has been submitted for publication.
Plan for international survey of OPAT practices internationally once membership has better coverage globally.


Last updated: November 28th-2019