Salazar Vizcaya, PhD

Professional Experience

2018- present Senior researcher at Inselspital; Bern University Hospital, University of Bern

2016 - 2018 Postdoctoral researcher at Inselspital, Bern University Hospital, University of Bern

2012 - 2015 Ph.D. candidate at the Institute for Social and preventive Medicine, University of Bern

2011 - 2012 Internship - mathematical modelling at the Institute for Social and preventive Medicine, University of Bern

2009 - 2011 Consultant - macroeconomic models for estimating the impacts of climate change at the National Planning Department, Bogotá

2008 - 2009 Credit and market risk Analyst at Banco de Bogotá

2007 - 2008 Outreach-Science Physics coordinator at Maloka Science Museum, Bogotá 


2012 - 2015 Ph.D. in Biomedical Sciences at the Institute for Social and preventive Medicine, University of Bern

2007 - 2009 Master of Science in Applied Mathematics; Universidad Nacional de Colombia, Bogotá

2002 - 2007 Undergrad in Physics (5 years equivalent); Universidad Nacional de Colombia, Bogotá 

Research Interests

  • Computer simulations of dynamic systems in nature and human populations
  • Mathematical modelling and pattern recognition of sexual behaviour, transmission and progression of infectious diseases
  • Modelling of public health interventions
  • Machine learning for public health
  • Molecular epidemiology
  • HIV, Sexually transmitted infections, Hepatitis C and co-infection
  • Antimicrobial resistance
  • Surgical site infection
  • Paediatric HIV

Software skills

  • R, Python (TensorFlow, pandas, numpy, scipy)
  • RAxML BEAST, FastTree, TMVA, Mathematica.
  • C++, Matlab/Octave
  • Operating systems: GNU/Linux, LATEX, GNUplot

Selected publications

SalazarVizcaya, Luisa, Roger D. Kouyos, Cindy Zahnd, Gilles Wandeler,
Manuel Battegay, Katharine Elizabeth Anna Darling, Enos Bernasconi et al.
"Hepatitis C virus transmission among human immunodeficiency virus infected
men who have sex with men: modeling the effect of behavioral and treatment
interventions." Hepatology 64, no. 6 (2016): 1856-1869.

Salazar-Vizcaya, Luisa, Katharina Kusejko, Axel J. Schmidt, German Carrillo-
Montoya, Dunja Nicca, Gilles Wandeler, Dominique L. Braun et al. "Clusters
of Sexual Behavior in Human Immunodeficiency Virus positive Men Who Have
Sex With Men Reveal Highly Dissimilar Time Trends." Clinical Infectious Dis-
eases (2019).

Salazar-Vizcaya, Luisa*, Roger D. Kouyos*, Karin J. Metzner, Kamila
Caraballo Cortes, Jürg Bni, Cyril Shah, Jan Fehr et al. "Changing trends
in international versus domestic HCV transmission in HIV-positive MSM:
A perspective for the DAA scale-up era." The journal of infectious diseases
(2019).*Equal contribution

Boettiger, David C.*, Luisa Salazar-Vizcaya*, Gregory J. Dore, Richard
T. Gray, Matthew G. Law, Denton Callander, Toby Lea, Andri Rauch, and
Gail V. Matthews. "Can Australia Reach the World Health Organization Hepatitis C Elimination Goal by 2025 Among Human Immunodeficiency Virus-
positive Gay and Bisexual Men?." Clinical Infectious Diseases (2019).*Equal

Salazar-Vizcaya, Luisa, Olivia Keiser, Karl Technau, Mary-Ann Davies,
Andreas D. Haas, Nello Blaser, Vivian Cox et al. "Viral load versus CD4
monitoring and 5-year outcomes of ART in HIV-positive children in Southern
Africa: cohort-based modelling study." AIDS (London, England) 28, no. 16
(2014): 2451.

Salazar-Vizcaya, Luisa, Roger D. Kouyos, Jan Fehr, Dominique Braun,
Janne Estill, Enos Bernasconi, Julie Delaloye et al. "On the potential of a
Short term intensive intervention to interrupt HCV transmission in HIV
positive men who have sex with men: a mathematical modelling study." Journal
of viral hepatitis 25, no. 1 (2018): 10-18.

Salazar-Vizcaya, Luisa, Gilles Wandeler, Jan Fehr, Dominique Braun, Matthias
Cavassini, Marcel Stoeckle, Enos Bernasconi et al. "Impact of Direct-Acting
antivirals on the burden of HCV infection among persons who inject drugs and
men who have sex with men in the Swiss HIV cohort study." In Open forum
infectious diseases, vol. 5, no. 7, p. ofy154. US: Oxford University Press,

Zahnd, Cindy, Luisa Salazar-Vizcaya, Jean-Francois Dufour, Beat Müllhaupt,
Gilles Wandeler, Roger Kouyos, Janne Estill et al. "Modelling the impact of
deferring HCV treatment on liver-related complications in HIV coinfected men
who have sex with men." Journal of hepatology 65, no. 1 (2016): 26-32.

Kusejko, Katharina, Luisa Salazar-Vizcaya, Dominique L. Braun, Philip E.
Tarr, Enos Bernasconi, Thanh Doco-Lecompte, Matthias Cavassini et al. "Self-
reported neurocognitive impairment in people living with HIV: Characterizing
clusters of patients with similar changes in self-reported neurocognitive impairment
2013-2017 in the Swiss HIV Cohort Study." Clinical Infectious Diseases

European Treatment Network for HIV, Hepatitis and Global Infectious Diseases (NEAT-ID) Consensus Panel∗ Recently acquired and early chronic hepatitis C in MSM: Recommendations from the European treatment network for HIV, hepatitis and global infectious diseases consensus panel, AIDS: October 1, 2020 - Volume 34 - Issue 12 - p 1699-1711 doi: 10.1097/QAD.0000000000002622; 

In preprint scientific repositories

Luisa Salazar-Vizcaya, Andrew Atkinson, Andreas Kronenberg, Cathrine
Pluess, Roger Kouyos, Viacheslav Kachalov, Nicolas Troillet, Jonas Marschall,
Rami Sommerstein. The impact of public health interventions on the future prevalence of ESBL-producing Klebsiella pneumoniae: a population based
mathematical modelling study
medRxiv 19012765; doi:

Viacheslav N. Kachalov, Huyen Nguen, Suraj Balakrishna, Luisa Salazar-
Vizcaya, Rami Sommerstein, Stefan P. Kuster, Anthony Hauser, Pia Abel
zur Wiesch, Eili Klein, Roger D. Kouyos. Identifying the drivers of multidrug-
resistant Klebsiella pneumoniae at a European level
medRxiv 19012997; doi:


Salazar Vizcaya Luisa, Blaser Nello and Gsponer Thomas, Gems: Generalized multistate simulation model. R package. Available on CRAN:

Other publications:

Salazar-Vizcaya Luisa. Viral load versus CD4 monitoring of ART in HIV-positive children, SACEMA Quarterly. March, 2015.

Selected abstracts in international conferences

As presenter

Oral presentation at the Conference on Retroviruses and Opportunistic Infections (CROI) 2018 in Boston: Luisa Salazar-Vizcaya, Roger Kouyos,
Karin Metzner, Kamila Caraballo, Cyril Shah, Jrg Bni, Manuel Battegay,
Enos Bernasconi, Alexandra Calmy, Matthias Cavassini, Herbert A. Mbunkah,
Olivia Keiser, Andri Rauch. International versus domestic transmission in
MSM: a perspective for the DAA era.

Oral presentation at the 22nd International AIDS Conference 2018 in Amsterdam: L. SalazarVizcaya*, D.C. Boettiger*; G.J. Dore; R. Gray; M.
Law; A. Rauch; T. Lea and G. Matthews. Will hepatitis C transmis-
sion be eliminated by 2025 among HIVpositive men who have sex with men in Australia?

Oral presentation at the 16th European AIDS Conference (EACS) 2017
in Milan: L Salazar-Vizcaya
, Axel Schmidt, Dunja Nicca, Gilles Wandeler,
Katharina Kusejko, Dominique Braun, Jan Fehr, Marcel Stckle, Enos
Bernasconi, Roger D Kouyos and Andri Rauch. Highly Dissimilar Patterns
of Sexual Risk Behaviour among HIV-positive Men who Have Sex with Men:
Clustering Individual Trajectories in the Swiss HIV Cohort Study from 2000
to 2017.

Poster presentation at the 28th European Congress of Clinical Microbiology
and Infectious Diseases (ECCMID) 2018 in Madrid: L. Salazar Vizcaya
A. Andrew, A. Kronenberg, C. Plüss-Suard, J. Marschall, R. Sommerstein.
The impact of non-human transmissions on the future prevalence of ESBL-
producing Klebsiella pneumoniae: a population based mathematical modelling

Other presenters

Oral presentation at the 17th European AIDS Conference (EACS) 2019
in Basel, PS6/3, S Balakrishna*, L Salazar-Vizcaya*, K Kusejko, V Kachalov, C Thurnheer, JA Roth, A Calmy, M Cavassini, M Battegay, P Schmid, E Bernasconi, HF Günthard, A Rauch, RD Kouyos, the Swiss HIV Cohort Study. Modelling the syphilis epidemic among HIV-infected and uninfected MSM in Switzerland.

Poster presentation at the 17th European AIDS Conference (EACS) 2019 in Basel, PE24/21, S Andresen, S Balakrishna, D Nicca, HF Günthard, AJ Schmidt, A Calmy, KEA Darling, M Stöckle, P Schmid, E Bernasconi, A Rauch*, RD Kouyos*, LP Salazar-Vizcaya*, Swiss HIV Cohort Study. Behavioral patterns to identify key populations for syphilis prevention.

Reviewer for
Proceedings of the National Academy of Sciences (PNAS), PLOS Computational Biology, Eurosurveillance, AIDS, JIAS, OFID, Scientific Reports, PloSOne.