Medical Microbiology Research Topics: Resistant Isolates, Fungi and Lab Diagnostics in Pakistan

Questions to settle before you pick a microbiology topic

Before I commit to a microbiology topic, I need answers to a few practical questions.

• Can I get isolates, specimens or stored strains from a hospital laboratory, and who signs the permission?
• Does my department have the equipment for the method, such as PCR, broth microdilution or sequencing, or do I need a partner laboratory?
• Will I follow CLSI or EUCAST for susceptibility testing, and which edition?
• Has a Pakistani group already published the same organism, gene and hospital?
• Which control strains will I run, and where will they come from?

Medical microbiology covers the bacteria, fungi, viruses and parasites that infect people. The topics below stay inside that field and rely mostly on laboratory isolates and records. Food, soil, industrial and plant microbiology are not covered here. Questions that start at the bedside belong in medical research topics for clinic and ward questions.

What a microbiology topic needs before it counts as a topic

Isolates, permissions and ethics

Published Pakistani studies show two workable routes. The Aga Khan University team used stored, anonymised strains from its laboratory strain bank and received an exemption from full ethical review (the Aga Khan colistin study). A Faisalabad team collected 240 Escherichia coli strains from two hospital laboratories. It worked under institutional biosafety committee approval, and individual consent was not needed because the strains came from laboratories (a Faisalabad mcr-1 study). Your own committee decides which route applies, so ask early and get the laboratory head’s permission in writing.

Methods you can run in your own laboratory

Disc diffusion, MIC testing and conventional PCR with gel electrophoresis sit within most university laboratories. Sequencing often does not. The Rawalpindi OXA-48 team stopped at PCR and listed missing sequencing, caused by budget limits, as a limitation (a Rawalpindi OXA-48 study). The Aga Khan colistin team, by contrast, sent DNA to an outside sequencing service. So decide at the start which steps stay in your laboratory. Then name the partner for the rest, and read how to choose a research methodology if the design is still open.

One standard, with its edition

Published teams name their standard. The Rawalpindi group followed CLSI M100, 32nd edition, for disc testing. The Faisalabad group read colistin results against EUCAST version 13.0, and the Aga Khan mycology group used EUCAST epidemiological cut-off values for antifungal MICs. Pick one standard, write its edition in your methods, and use the same breakpoints throughout. The guide to writing the methodology chapter shows where this belongs.

Carbapenem and colistin resistance in Gram-negative bacteria

Hospital laboratories already hold the isolates for these two projects. The harder part is choosing a question that one laboratory can still answer.

1. Carbapenemase tests against PCR for NDM and OXA-48-like genes in Klebsiella pneumoniae

The question: how closely does a carbapenemase test your laboratory already runs, such as the modified carbapenem inactivation method, agree with PCR for blaNDM and blaOXA-48-like genes? A Rawalpindi study at Pak Emirates Military Hospital found the OXA-48-like gene in 200 of 266 carbapenem-resistant isolates, or 75.18%, but it tested no other gene. Its authors tie the high figure to critically ill patients. They call for multicentre work. In Lahore, a study of 2,170 clinical strains ran from May 2019 to April 2022. It reported blaNDM-1 (41.1%) and blaOXA-48 (32.6%) as its most frequent carbapenemase genes, and blaNDM-1 was linked to the intensive care unit (a Lahore carbapenem burden study).

Approach: collect carbapenem-resistant K. pneumoniae from one hospital over a fixed period, confirm the phenotype, then run PCR for blaNDM, blaOXA-48-like, blaKPC, blaVIM and blaIMP, and split results by ward. Validate primers and a positive control first. This topic suits MS and MPhil. The common trap is testing one gene and presenting it as the whole mechanism.

2. Colistin resistance in Klebsiella pneumoniae beyond mcr-1

The question: in colistin-resistant K. pneumoniae from your hospital, does mcr-1 explain the resistance, or do chromosomal changes? Published Pakistani results disagree. The Aga Khan team found no mcr-1 in 34 colistin-resistant strains. Whole genome sequencing of eight showed changes in the Lipid A-Ara4N pathway genes ArnA, UgdH, ArnC and ArnT. The authors still ask for larger samples and functional tests. They also cite a Peshawar report of mcr-1 in 40% of 60 K. pneumoniae isolates, which is a very different picture. In Faisalabad, mcr-1 turned up in 10 of 240 E. coli from urine and pus.

Approach: measure colistin MIC by broth microdilution and screen for mcr-1 by PCR. Then sequence the chromosomal genes the Aga Khan authors name as common sites, namely mgrB, phoP, phoQ, pmrA and pmrB. Both groups anchored their work on broth microdilution, so budget for it early. This topic suits MPhil or PhD.

Position correct as of November 2026. The figures in this group come from single-site studies, so check each journal before you quote a number.

Gram-positive resistance and the quality of the laboratory itself

Each of these three topics starts from routine laboratory work rather than from a new assay.

3. mecC and vancomycin MIC creep in MRSA at a hospital outside Lahore and Islamabad

The question: how common are mecA and mecC among cefoxitin-resistant Staphylococcus aureus at one hospital, and how are vancomycin MICs distributed? At Lahore General Hospital, 440 of 3,305 S. aureus isolates (13.3%) were MRSA. Three carried mecC. In addition, 120 had vancomycin MICs above 1.5 µg/mL by E-test, and SCCmec III was the most common type among them (the Lahore General Hospital MRSA study). An Islamabad hospital reported the first clinical MRSA carrying mecC, alone or with mecA, among 1,528 staphylococcal isolates. It asked for work in other hospitals (the Islamabad mecC report).

Approach: identify MRSA by cefoxitin disc and test mecA and mecC by PCR. Then run E-test on every MRSA isolate, and plot the MIC distribution by year if records allow. Because only three of 440 Lahore isolates carried mecC, confirm any mecC result by sequencing. This topic suits MS and MPhil.

4. Blood culture contamination by ward: audit first, then test one change

The question: which wards contaminate blood cultures most, and does one practical change lower the rate? The emergency department of a Karachi tertiary hospital cut contamination from 8% in 2013 to 3.9% in 2016. It added a collection kit with a checklist, chlorhexidine-alcohol skin preparation and a dedicated phlebotomy team. The authors cite 3% or below as the accepted benchmark (a Karachi emergency department audit). Indus Hospital in Karachi reviewed 86,774 cultures and lowered the mean rate from 4.6% to 3.1% (the Indus Hospital audit). In Rawalpindi, an audit of 1,816 cultures found 14% contaminated. The rate was 23.2% in the neonatal ICU and 19% to 23% across paediatric wards (an Armed Forces Institute of Pathology audit).

Approach: write a contaminant definition before you start, as the Karachi team did for coagulase-negative staphylococci, Corynebacterium and Bacillus in a single peripheral culture. Then collect twelve months of ward-level rates and test one change. The Rawalpindi team also reviewed each patient’s clinical condition before labelling an isolate a contaminant, which protects true infections from being dismissed. This topic suits final-year BS laboratory students and MS. Nursing students interested in collection technique can pair the design with ideas from nursing thesis topics.

5. A first cumulative antibiogram for one hospital, set against the national plan

The question: what does one year of routine susceptibility results show for the ICU compared with the wards? Pakistan’s AMR National Action Plan was released in May 2017 by the Ministry of National Health Services. It lists an integrated national surveillance system among its strategic priorities (the national action plan text). A narrative review of progress calls for monitoring all of the plan’s objectives alongside stewardship and infection control (a review of Pakistan’s action plan progress). A hospital antibiogram is one way a single laboratory can contribute local data.

Approach: export one year of culture records and keep one isolate per patient per organism. Split ICU from wards, and report resistance for the organism and drug pairs your laboratory tests routinely. Then set your carbapenem figure beside the 42.1% carbapenem resistance reported from one Lahore hospital (the Lahore resistance burden abstract). Position correct as of November 2026; check the Ministry of National Health Services for the current plan. This topic suits BS and MS.

Fungal infections: yeasts and skin fungi

Both topics here depend on exact species identification, which decides whether the result means anything.

6. Screening fluconazole-resistant Candida for Candida auris in a hospital without a published screen

The question: do fluconazole-resistant Candida isolates from your ICU include C. auris that routine systems miss? At Aga Khan University Hospital, 92 patients with C. auris were identified between September 2014 and March 2017. Fluconazole resistance was 100% in the isolates tested (the Aga Khan C. auris series). The Karachi yeast was first identified locally as Saccharomyces. A field epidemiology investigation from April 2015 to January 2016 could not find a source (the outbreak investigation). A Lahore screen of 636 Candida isolates from several tertiary institutions found 248 (38.9%) resistant to fluconazole (a Lahore Candida screen).

Approach: gather fluconazole-resistant Candida from ICU and bloodstream cultures over six months. Identify them to species by MALDI-TOF or species-specific PCR, and test antifungal MICs by the method your partner laboratory runs. Search PubMed for your own hospital first. This topic suits MS and MPhil.

7. Terbinafine-resistant dermatophytes: ITS identification and SQLE mutations

The question: which Trichophyton species and which squalene epoxidase (SQLE) changes sit behind tinea that fails standard treatment at a clinic in your city? An Aga Khan University Hospital laboratory study from January 2023 to February 2024 identified 37 Trichophyton isolates by ITS sequencing. Sixteen were T. indotineae and 17 were T. mentagrophytes. Terbinafine MICs were non-wild-type in 28 isolates (75.7%), and the most frequent SQLE changes were F397L (54%), Q408R (32.4%) and A448T (21.6%). The authors call it the first Pakistani report of its kind and ask for more antifungal testing capacity (the Aga Khan dermatophyte study).

Approach: collect skin scrapings from patients who have failed standard therapy at one dermatology clinic. Culture them and identify by ITS sequencing, then send isolates to a reference laboratory for MICs. The identification step also works as a stand-alone BS or MS project if MICs are out of reach. The full study suits MPhil or PhD.

Diagnostics for parasites, tuberculosis and hepatitis C

These three topics compare tests or read molecular results, so the design depends more on your laboratory partner than on the clinic.

8. Microscopy against PCR for cutaneous leishmaniasis, with species identification

The question: how often does smear microscopy miss lesions that PCR detects, and which Leishmania species circulate in one district? In southern Khyber Pakhtunkhwa, a 2011 to 2016 study of 432 biopsy samples found Leishmania by microscopy in 71.3% and by ITS-1 PCR in 86.6%. Restriction analysis confirmed L. tropica in 351 samples and L. major in six. The authors call the second result the first L. major report from that anthroponotic focus in Kohat (a southern Khyber Pakhtunkhwa study). In Peshawar, a study of 125 patients identified L. tropica in 89.2%, L. major in 6.8% and L. infantum in 4.1%. It found kinetoplast DNA PCR the most sensitive method (a Peshawar species study). A study of 300 patients across Balochistan, Khyber Pakhtunkhwa and Punjab used real-time ITS-1 PCR and also found mainly L. tropica (a three-province molecular study).

Approach: pick one district hospital or dermatology clinic and take a smear and a filter-paper sample from each lesion. Run PCR, identify the species by restriction analysis or sequencing, and map cases by locality. Report microscopy and PCR positivity separately, because the studies above show that positivity differs by method. This topic suits MS and MPhil.

9. rpoB mutation patterns from Xpert probe data and their match with drug susceptibility testing

The question: which rpoB probes are hit most often at your treatment site, and does the Xpert rifampicin result match phenotypic testing? A Dow University of Health Sciences team reviewed 713 rifampicin-resistant cases at the Ojha Institute of Chest Diseases from 2013 to 2017. Probe E accounted for 66.48% of mutations, probe B for 14.3% and probe D for 11.08% (a Karachi chest institute study). In Lahore, a study of 2,200 TB suspects at Jinnah Hospital found rifampicin resistance in 134 by Xpert. Susceptibility testing found 129, with seven false positives. Its authors note that conventional testing takes about 60 days (a Lahore GeneXpert evaluation).

Approach: with permission, review programme records at one site, code the probe pattern for each resistant case, and compare with phenotypic results where both exist. Probe data locate a region of the gene but do not name the exact change, so only a design with sequencing can claim that. Keep patient identifiers out of your data file. Live culture of Mycobacterium tuberculosis needs a high-containment laboratory, which is why this topic works from records. Studies from Khyber Pakhtunkhwa and Balochistan also exist, so compare against them. This topic suits MS, or PhD if sequencing is added.

10. NS5A resistance-associated substitutions in hepatitis C genotype 3a after treatment failure

The question: do patients who failed sofosbuvir plus daclatasvir carry NS5A substitutions that treatment-naive patients do not? A Pakistan Journal of Zoology study compared the two groups by Sanger sequencing of NS5A and the Geno2Pheno tool. Four substitutions, A30T, Y93H, P58T and S98G, appeared only in treated patients (a Pakistan Journal of Zoology NS5A study). Genotype 3a is already the most reported genotype in Pakistan, so a plain genotype count adds little.

Approach: partner with a viral hepatitis laboratory that can run RT-PCR and sequencing. Recruit two small groups, and report substitutions by position with their frequencies. Failure cohorts are small, so state that limit up front. This topic suits PhD or a well-resourced MPhil.

Water and One Health

These two topics need no patient samples, so they suit students without ward access.

11. Coliform and E. coli counts in filtration-plant water against household storage

The question: does water that leaves a filtration plant clean still pass the test after storage at home? A study of 32 filtration plants in Islamabad found E. coli in 8 samples (25%) and total coliforms in 13 (40.6%). Testing was done at the Pakistan Council of Research in Water Resources laboratory. The authors counted a sample as contaminated above 2.0 MPN per 100 mL of total coliforms or E. coli (an Islamabad filtration plant study).

Approach: sample the plant tap and a household container on the same day in one sector or union council. Count by MPN or membrane filtration, and compare the two. The Islamabad team flushed and flamed the tap, iced the bottles and delivered them to the laboratory quickly, so copy those steps. Ask the plant operator or water authority for permission. This topic suits BS and MS.

12. Ceftazidime-resistant E. coli in healthy broilers at slaughter points in one district

The question: how does resistance in healthy broilers from one district compare with the national baseline? A Fleming Fund supported national study ran from July 2020 to December 2022 through nine peripheral sentinel laboratories. It recovered E. coli from 1,456 of 2,317 poultry samples (63%). Resistance to ciprofloxacin and ceftazidime was detected (the national food animal surveillance summary). The Faisalabad authors add that mcr-1 has been found in Pakistani E. coli from poultry and dairy cows. They state that colistin use in animal farming has not been banned in the country.

Approach: take caecal contents from one slaughter point over several visits. Screen E. coli on antibiotic-containing agar and confirm by disc testing. Add PCR for the genes you can run, and report against the national baseline. Ask your university which ethics or biosafety committee covers animal-derived samples. This topic suits MS or MPhil in microbiology or veterinary sciences.

Which topic suits which level

Level	Topics that fit	What the thesis delivers
BS laboratory science, final year	4, 5, 11	A records audit or water survey with a clear denominator
MS or MPhil	1, 3, 6, 8, 9, 12	A single-site molecular or diagnostic comparison
MPhil with a partner laboratory, or PhD	2, 7, 10	A mechanism question that needs sequencing or reference testing

MPhil students can read the MPhil thesis guide for the evaluation route. Several studies cited above are short single-site papers. A narrow microbiology project can therefore grow into a journal article, and turning a thesis into a journal paper explains how.

Narrow a microbiology idea in five steps

1. Name one organism or one gene, not “antibiotic resistance”.
2. Fix one hospital or district and one time window.
3. Write the method you can run yourself, and name the partner for the rest.
4. Search PubMed, Google Scholar and the HEC repository of Pakistani theses for the same organism, gene and city. Then use a literature review to show what is left.
5. State the question and its main limit in two sentences. After that, build the proposal from a research proposal guide and a sample proposal format.

Common mistakes in microbiology theses

First, many students run a plant extract on agar and report a zone of inhibition alone. Without an MIC, a reference antibiotic and clinical isolates, the result says little about treatment.

Second, controls get skipped. The studies above used reference strains such as E. coli ATCC 25922, so a reader can trust the plates.

Third, percentages appear without denominators. Always write the count, for example 200 of 266, as the Rawalpindi team did.

Finally, contaminants get counted as pathogens. Use a written definition and clinical review, as the blood culture audits did.

Questions students ask before they start

How many isolates do I need?

Work backwards from a published prevalence. The Rawalpindi OXA-48 team used the WHO sample size calculator with a 22.2% prevalence from a local study, which gave 266 samples. A small stored collection, such as the 34 strains in the Aga Khan colistin study, can answer a mechanism question but not a prevalence question. Your supervisor or a statistician should confirm the calculation.

Can I use isolates already stored in a hospital laboratory?

Published teams have done so. The Aga Khan group used anonymised stored strains under an ethics exemption, and the Faisalabad group worked from hospital laboratory strains under biosafety committee approval. However, your committee and the laboratory head decide, so get both answers in writing before you start.

Do I need whole genome sequencing for an MPhil?

No. The Rawalpindi study used conventional PCR with gel electrophoresis and still appeared in a peer-reviewed journal. Sequencing suits PhD designs or MPhil projects with a partner laboratory, as the outside sequencing in the Aga Khan colistin study shows.

Where to go next

Pick two topics, write the method you can actually run beside each, and take the shortlist to your supervisor. Other fields sit in the thesis topics directory. If a shortlist, laboratory plan or proposal needs a second reader, send your topic, level and deadline through the order form, and PhD candidates can also read about PhD thesis support. Support is available 24/7, every day of the year, on WhatsApp, email and live chat. The support is meant for reference and learning, so use it according to your institution’s policy. What students have said about working with us is also public.