HYBRID EVENT: You can participate in person at Rome, Italy or Virtually from your home or work.

4th Edition of World Congress on Infectious Diseases

June 21-22, 2023 | Rome, Italy

June 21 -22, 2023 | Rome, Italy
Infection 2023

Michael Ansah

Speaker at World Congress on Infectious Diseases 2023 - Michael Ansah
University of Wolverhampton, United Kingdom
Title : The potential of guanidino and amidopropyl dimethylamine compounds as topical treatments for diabetic foot ulcer infections


Diabetic foot ulcer (DFU) infections caused by multidrug resistant (MDR) organisms cost approximately 1% of the annual NHS budget, mainly through pre/post op management of complications/amputations. The aim of this study is to investigate the potential of guanidino based compounds and amidopropyl dimethylamines as repurposed topical treatments for DFU infections. Compounds from these groups have demonstrated a wide range of uses including antiseptics, antimalarial, antidiabetic and anticancer compounds. These compounds also demonstrate antimicrobial activity through disruption of the cellular membrane. The study investigated the activity of guanidino based and amidopropyl dimethylamine compounds against a broad range of MDR organisms including Staphylococcus aureus (S. aureus), Pseudomonas aeruginosa (P. aeruginosa) and Candida albicans (C. albicans). This study has demonstrated that of the guanidino based compounds, polyhexamethylene guanidine (PHMG), polyaminopropyl biguanide (PAPB) and polyhexamethylene biguanide (PHMB) demonstrated significant activity against all the test organisms. PHMG, PHMB and PAPB demonstrated complete kill within 24 hours against S. aureus at 0.05 µg/ml and complete kill within 2 hours at 0.1 µg/ml against P. aeruginosa. PHMG demonstrated complete kill of C. albicans within 6 hours at 0.05 µg/ml. This study has also demonstrated that several amidopropyl dimethylamines demonstrate significant activity against the test organisms. Palmatamidopropyl dimethylamine (PAPD) at 7.8 µg/ml demonstrated complete kill within 1 hour against S. aureus and within 24 hours against C. albicans. PAPD and N,N-dimethylhexadecylamine demonstrated complete kill against P. aeruginosa within 4 hours and 2 hours respectively at 1 µg/ml. This study has demonstrated that guanidino based and amidopropyl dimethylamine compounds warrant further investigation for inclusion in the topical treatment of DFU infections.

Audience take away:
The audience will learn that gaunidino and amidopropyl dimethylamine compounds demonstrate activity against several MDR organisms including S. aureus, P. aeruginosa and C. albicans. Although this is framed in the setting of diabetic foot ulcer infection, these organisms are capable causing several other types of infection. Therefore, this study highlights such compounds for the potential use against a number of bacterial and fungal infections. The study also highlights that the length of the carbon chain attached to the functional group influences the antimicrobial activity of the compound. This information will be useful for those synthesizing similar compounds for potential treatment of bacterial and fungal infections.


Michael Ansah studied biochemistry at Keele University, England and graduated in 2019. He then went on to complete his MPhil in Parasitology at Keele University, supervised by Prof. Helen Price, with the thesis title of “Screening of an open-source compound library against the livestock parasite Trypanosoma evansi” He is currently a third year PhD student at the University of Wolverhampton, supervised by Dr. Wayne Heaselgrave, with the proposed thesis title of “Investigating current treatments and untested compounds for the topical treatment of leishmaniasis and MDR bacterial and fungal diseases.”