Dr Machin has interests in clinical microbiology and clinical virology. In particular, he has expertise in the diagnosis and management of viral infections in sexual health, solid organ and haematological transplant and critically ill patients. Additionally, in the diagnosis and management of emerging viral infections, having been involved in the recent COVID-19 pandemic and Monkeypox outbreak. He has a specialist interest in infection prevention and control of viral infections in hospital settings.

All aspects of infectious disease & tropical medicine, including: • Meningitis & encephalitis • Septicaemia • Skin & soft tissue infections (cellulitis, fasciitis) • Chest infections • Tuberculosis • Gastro-enteritis (food poisoning) • Infectious hepatitis • HIV/AIDS infection • Other bloodborne virus infections (hepatitis B & C) • Urinary tract infections • Malaria • Other travel-related conditions (dysentery, amoebiasis, typhoid, dengue, etc.) • Schistosomiasis • Tropical medicine • Covid-19 infection

Infection & infectious diseases • Hospital-acquired infection • Travel & tropical medicine • All vaccinations • Especially: AIDS/HIV, Campylobacter, Clostridium difficile , COVID-19, encephalitis, Escherichia coli O157, food poisoning, gastroenteritis, immunisations, Legionnaire's disease, leishmaniasis, leptospirosis, life expectancy, listeriosis, Lyme disease, malaria, meningitis, monkeypox, MRSA, norovirus, Q fever, sepsis, septic shock, swine flu, toxoplasmosis, typhoid fever, tuberculosis

Medical microbiology and virology • Infectious diseases • Infection prevention and control • Vaccination • Antibiotics • Laboratory testing for the diagnosis of infection