Overview
Microbiology is the study of microorganisms — bacteria, viruses, fungi, and parasites — that are invisible to the naked eye but profoundly shape life on Earth. Microbes cause infectious diseases, but they also drive essential processes: decomposing waste, producing oxygen, fermenting food, and maintaining healthy human microbiomes. The COVID-19 pandemic powerfully demonstrated the importance of microbiological expertise.
The curriculum covers bacteriology, virology, mycology, parasitology, immunology, microbial genetics, and biotechnology. Laboratory work is intensive — students learn techniques like aseptic culture, microscopy, PCR, gel electrophoresis, and bioinformatics for genomic analysis. Many programmes include research projects and clinical or industrial placements.
Microbiology graduates are in demand across healthcare, pharmaceutical development, food and beverage production, environmental remediation, and biotech. The rise of antimicrobial resistance has made microbiology one of the most urgent fields in global health, creating new career opportunities in drug development, diagnostics, and public health surveillance.
Microbiology has been revitalized by the microbiome revolution, and the field’s leading programmes reflect this transformation. MIT’s microbiology research spans its Department of Biology and the Department of Biological Engineering, with strong connections to the Broad Institute’s infectious disease programme and the Center for Microbiome Informatics and Therapeutics. The Institut Pasteur in Paris holds a historic place in microbiology—founded by Louis Pasteur himself—and continues to lead globally in infectious disease research, vaccinology, and antimicrobial resistance. The University of Edinburgh’s Institute of Microbiology and Infection integrates genomics, synthetic biology, and bioinformatics with traditional microbiology. The University of Melbourne’s Peter Doherty Institute for Infection and Immunity is a world-leading centre for infectious disease research, while ETH Zurich’s Institute of Microbiology bridges fundamental microbial biology with biotechnological applications.
Career Outcomes & Salary
What jobs can I get and how much will I earn?
$45,000–$65,000 (US) / £26,000–£35,000 (UK) / A$50,000–$70,000 (AU)
$65,000–$110,000 (US) / £38,000–£65,000 (UK) / A$75,000–$115,000 (AU)
$100,000–$200,000+ (US, senior pharma or academic positions)
Strong—AMR, pandemic preparedness, and microbiome research are all major growth areas. Clinical microbiology faces workforce shortages in many countries. Pharmaceutical demand for microbiologists in drug development and quality control remains high.
Industry Trends & Outlook
Where is this field heading?
Microbiology is at the forefront of several of the most pressing challenges in global health and biotechnology. Antimicrobial resistance (AMR) has been declared a global health emergency by the WHO—drug-resistant infections kill over 1.2 million people annually and are projected to cause more deaths than cancer by 2050 if trends continue. This has created urgent demand for microbiologists in pharmaceutical companies developing new antibiotics and alternative therapies (phage therapy, antimicrobial peptides, anti-virulence strategies), in public health surveillance systems tracking resistance patterns, and in hospital infection control. The COVID-19 pandemic reinforced the central importance of virology and epidemiology, and pandemic preparedness has become a major funding priority for governments and international organizations.
The microbiome revolution is transforming our understanding of health, agriculture, and environmental science. Research on the human gut microbiome has revealed connections between microbial communities and conditions ranging from obesity and diabetes to mental health and immune function. This has created a new industry in microbiome therapeutics—fecal microbiota transplantation, engineered probiotics, and precision microbiome-based diagnostics. Agricultural microbiology is developing microbial alternatives to chemical fertilizers and pesticides. Environmental microbiology is addressing climate change through carbon sequestration by microbial communities and bioremediation of polluted sites. Meanwhile, synthetic biology is using engineered microorganisms to produce biofuels, pharmaceuticals, and industrial chemicals.
For students entering microbiology, career prospects are strong and diverse. Pharmaceutical and biotech companies are the largest employers, with roles in research, quality control, regulatory affairs, and clinical trials. Public health agencies (CDC, WHO, Public Health England) need microbiologists for disease surveillance and outbreak response. Academic research remains well-funded, particularly in AMR, virology, and microbiome science. Clinical microbiology in hospitals provides a direct healthcare career path. The students who are most competitive combine strong laboratory skills with computational abilities—genomic analysis, bioinformatics, and data science are increasingly integral to modern microbiology.
AI & This Major
AI is enhancing microbiology through genomic analysis, automated microscopy, and drug discovery. But laboratory skills, experimental design, and the contextual understanding of microbial biology remain deeply human. Microbiologists who combine wet-lab expertise with bioinformatics and data science are the most competitive.
What You'll Learn
Core topics and skills covered in this degree
Is This Right For Me?
Honest self-assessment to help you decide
You'll thrive if...
- ✓You’re fascinated by the invisible world of microorganisms—bacteria, viruses, and fungi are endlessly diverse and consequential despite being unseen
- ✓You enjoy hands-on laboratory work—culturing organisms, performing experiments, and getting tangible results from your bench work
- ✓You’re motivated by the real-world impact of the science—microbiology directly addresses infectious disease, food safety, and environmental challenges
- ✓You like the combination of molecular detail and whole-organism complexity—understanding both the biochemistry and the ecology of microbial life
- ✓You’re comfortable with the biological sciences but also willing to engage with chemistry, statistics, and increasingly, computational methods
Might not be for you if...
- ●You dislike laboratory work—microbiology is intensely lab-based, with practical sessions often lasting 3–4 hours
- ●You’re uncomfortable with biological hazards—working with pathogenic organisms requires strict safety protocols and comfort with risk management
- ●You prefer theoretical or computational work over experimental science—microbiology is fundamentally a bench science
- ●You want to work directly with patients—clinical microbiology supports healthcare but microbiologists don’t treat patients (for that, study medicine)
- ●Chemistry makes you uncomfortable—microbiology involves substantial biochemistry, and students with weak chemistry backgrounds struggle
A Day in the Life
What a typical week actually looks like
A typical week in Year 2 of a microbiology programme is split between lectures that reveal the hidden complexity of microbial life and lab sessions that make it tangible. Monday starts with a microbial physiology lecture on bacterial metabolism—you’re learning about the electron transport chain in anaerobic respiration, how different terminal electron acceptors (nitrate, sulfate, iron) enable bacteria to thrive in environments where oxygen is absent. Your professor connects this to biogeochemical cycling, explaining how microbial metabolism literally shapes the chemistry of the planet. After lunch, a three-hour practical has you isolating antibiotic-resistant bacteria from soil samples using selective media, performing Kirby-Bauer disk diffusion assays, and measuring zones of inhibition—the smell of agar and the satisfaction of clear results are distinctive features of microbiology labs.
Tuesday features a virology lecture covering the replication cycle of HIV—reverse transcription, integration into the host genome, and why the virus mutates so rapidly that vaccine development remains challenging decades after its discovery. Wednesday brings a microbial genetics module on CRISPR-Cas systems—you’re learning how bacteria evolved an adaptive immune system against bacteriophages, and how researchers repurposed it into the most powerful gene-editing tool in history. The lab session has you designing CRISPR guide RNAs computationally and planning an experiment to knock out a specific gene in E. coli.
Thursday has an immunology lecture examining how the innate immune system recognizes microbial pathogens through pattern recognition receptors—toll-like receptors, NOD-like receptors, and the inflammasome. In the afternoon, a medical microbiology seminar presents clinical case studies: you’re given patient symptoms, lab results, and imaging, and must identify the likely pathogen and recommend treatment. Today’s case is a immunocompromised patient with an unusual fungal infection, and distinguishing between Aspergillus and Mucor species based on microscopy and culture characteristics is genuinely challenging. Friday is a journal club where students present and critique recent papers—this week’s paper describes a novel phage therapy approach to treating antibiotic-resistant Pseudomonas infections. Weekends involve writing lab reports (detailed methods, results with statistical analysis, and discussion sections), revising lecture notes, and preparing for next week’s practical on bacterial transformation.
High School Preparation
What to study and do before university
Skills to Develop
- •Master aseptic technique concepts—understanding contamination prevention is fundamental. Watch university lab videos on streaking plates, serial dilutions, and Gram staining before you arrive
- •Strengthen your biochemistry foundations—microbiology builds heavily on understanding metabolism, enzymes, DNA replication, and gene expression at the molecular level
- •Learn to read scientific papers—start with review articles in Nature Reviews Microbiology or microbiology sections of Science to develop comfort with primary literature
- •Develop data analysis skills—learn basic statistics and graphing in Excel or R, since quantifying microbial growth and experimental results is central to lab work
Extracurriculars
- •Enter science olympiads or biology competitions—these develop the detailed biological knowledge and experimental reasoning microbiology requires
- •Volunteer or intern in a research lab, hospital microbiology department, or public health agency—any wet-lab experience is invaluable
- •Complete online microbiology courses—MIT OpenCourseWare and Coursera offer free introductory microbiology content
- •Follow current microbiology news—antimicrobial resistance, emerging infectious diseases, and microbiome research are active and accessible topics
- •Start a science communication project—blog, YouTube channel, or school presentation about microorganisms, infectious disease, or antibiotic resistance
How This Compares to Similar Majors
Side-by-side with related fields
Getting In — Admissions Guide
How competitive is this major and how to stand out
Microbiology programmes are moderately competitive. Strong programmes at Imperial College London, University of Edinburgh, UCL, University of Melbourne, and UC Berkeley are more selective. UK programmes typically require ABB–AAA at A-Level with Biology and Chemistry. IB students need 34–38 with HL Biology and Chemistry at 6+.
What Strengthens Your Application
- 1Strong grades in Biology and Chemistry—both are essential prerequisites and demonstrate the dual foundation microbiology requires
- 2Laboratory experience—any wet-lab work (school projects, research internships, hospital placements) demonstrates readiness for a lab-intensive programme
- 3Evidence of interest in microbiology specifically—mentioning antibiotic resistance, emerging infections, or microbiome research shows you understand what the field involves
- 4Reading beyond the syllabus—scientific articles, popular science books about infectious disease or microbial life
- 5Mathematics competence—often underestimated, but microbiology increasingly requires quantitative and statistical skills
Common Mistakes to Avoid
- ●Confusing microbiology with medicine—microbiology is a research-oriented science degree, not a pathway to becoming a doctor (though it can complement medical careers)
- ●Underestimating the chemistry content—microbiology involves substantial biochemistry, and students without strong chemistry struggle
- ●Not demonstrating awareness of microbiology beyond infectious disease—the field includes industrial, environmental, and food microbiology
Interview & Admission Tests
Some programmes ask about your understanding of current microbiology issues (AMR, pandemic preparedness) and why you chose microbiology over broader biology. Be prepared to discuss a microbiological topic that interests you in some depth.
Related Majors
Frequently Asked Questions
What do you study in Microbiology?
Microbiology is the study of microorganisms — bacteria, viruses, fungi, and parasites — that are invisible to the naked eye but profoundly shape life on Earth. Microbes cause infectious diseases, but they also drive essential processes: decomposing waste, producing oxygen, fermenting food, and maintaining healthy human microbiomes. The COVID-19 pandemic powe…
What can you do after a Microbiology degree?
Typical entry-level roles: Research Associate, Quality Control Microbiologist, Clinical Microbiologist (Trainee), Biomedical Scientist, Regulatory Affairs Associate (starting salary $45,000–$65,000 (US) / £26,000–£35,000 (UK) / A$50,000–$70,000 (AU)). Key industries: Pharmaceuticals & Biotech, Clinical & Hospital Microbiology, Public Health & Epidemiology, Food & Beverage Safety, Environmental Monitoring. Strong—AMR, pandemic preparedness, and microbiome research are all major growth areas. Clinical microbiology faces workforce shortages in many countries. Pharma…
Which high-school courses prepare you for Microbiology?
Recommended IB courses: HL Biology, HL Chemistry, HL Mathematics: Analysis and Approaches; Recommended AP courses: AP Biology, AP Chemistry, AP Calculus AB or BC; Recommended A-Levels: Biology, Chemistry, Mathematics.
Want to prepare for Microbiology?
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