Concept
Host–pathogen
Host–pathogen research examines how microbes infect and how hosts detect and restrict them at molecular and cellular levels.
Host–pathogen studies show coevolution and immune evasion in mechanistic detail.
Evidence
What the evidence shows
Drawn from 10 studies in this library. Each claim links to the studies behind it.
Multiple empirical papers in this library examine host–pathogen with mechanistic biological findings.
Gut lumen clears in 3 h, but 50–1,000 bacteria persist in cLN up to 10 days with slowed killing after the first 2 h.
PD-1 is present on tissue-resident T cells in TB lung (35 patients); TNF-α is primarily responsible and neutralization reverses the anti-PD-1 phenotype.
Gene expression is highly periodic and stage-ordered across the IDC starting with merozoite invasion and parasitophorous vacuole formation.
The pan-genome is highly stable but not closed; accessory genes concentrate in hypervariable hotspots with mobile genetic elements as major accessory components.
Open questions
Where studies disagree
Open questions, not settled findings — worth knowing before you cite any one of these.
Systems and scales differ across host–pathogen studies (species, tissues, methods), so mechanisms should not be over-generalised.
Common misconceptions
Host–pathogen findings from one model organism always transfer to humans.
Model systems teach mechanism; transfer to other species is a separate empirical claim.
Exam-style questions
Short-answer questions that ask you to explain or compare, not recall.
What is Host–pathogen?
Host–pathogen research examines how microbes infect and how hosts detect and restrict them at molecular and cellular levels.
Why does Host–pathogen matter for biology undergraduates?
Host–pathogen studies show coevolution and immune evasion in mechanistic detail.
The studies
- How does malaria’s blood-stage transcriptome unfold?
Plasmodium falciparum’s 48-hour intraerythrocytic cycle was profiled hourly, revealing tightly staged gene-expression programs after RBC invasion.
- Apical-out enteroids for pathogen access
Suspending human enteroids without ECM flips polarity so microbes can meet the apical face.
- How open is the Listeria pan-genome?
Eleven new genomes spanning serotypes show a stable but open pan-genome with nine hypervariable hotspots dominated by mobile elements.
- LN DCs shelter antibiotic-tolerant Salmonella
Slow-growing Salmonella in cecum lymph-node dendritic cells survive ciprofloxacin therapy.
- Which genes does P. gingivalis need to grow?
A near-saturating Tn-seq screen finds ~463 (~22%) P. gingivalis genes putatively essential on blood agar.
- How do resistant banana roots respond to Fusarium?
Root transcriptomes differ between resistant and susceptible Cavendish bananas after Fusarium oxysporum TR4 infection.
- ATR inhibitor blocks SARS-CoV-2
DDR/ATR inhibitor berzosertib potently blocks SARS-CoV-2 replication in cell culture.
- PD-1 blockade reactivates TB via TNF
Anti-PD-1 immunotherapy can reactivate tuberculosis through TNF-α dysregulation.
- Does red light help tomatoes fight bacteria?
Tomato resistance to DC3000 peaks at 8:00 AM, bottoms at 8:00 PM, and is strongly enhanced by red light.
- Pathogenicity factors in Naegleria fowleri
Whole-genome analysis of N. fowleri highlights candidate pathogenicity factors for brain infection.
Learn alongside
Flashcards
Study Host–pathogen properly
Save this deck to NoteFren and review it with spaced repetition.