Bodyland: Leptospira & Syphilis
Plain-English analogies + exam anchors. Check the boxes as you recall each fact.
🪝 Leptospira interrogans — “the Fish-Hook Thief”
SpirocheteHooked endsWater + animal urine
Analogy: After floods, a fish-hook thief swims through puddles from animal urine.
When it sneaks into Bodyland, swimmers and surfers get red “goggles” eyes and sore calves from chasing it.
Classic picture: flu-like fever + myalgias (classically calves),
headache, jaundice, and conjunctival suffusion (red without exudate). Tropics, fresh water, sewage, pets/livestock.
Weil disease = “Yellow Badge” escalation: severe jaundice + kidney injury (azotemia), fever, hemorrhage, anemia.
Quick checks
🌀 Syphilis (Treponema pallidum) — “A 3-Act Mystery”
SpirocheteDark-field/DFA for bugScreen: RPR/VDRL → Confirm: FTA-ABS/TP-PA
Treatment anchor: Penicillin G is the hero for all stages (use desensitization in pregnancy).
Act I: Primary Syphilis — “The Calling Card”
Scene: a solitary, painless hard chancre at the entry site,
with clean base + raised borders; painless lymph nodes may appear.
How to see the culprit: dark-field microscopy or DFA from lesion fluid (serology may still be negative early).
Quick checks
Act II: Secondary Syphilis — “Confetti & Wet Warts”
Rash: diffuse, often palms & soles (the party confetti).
Lesions: Condylomata lata — smooth, moist, gray papules in warm areas (wet warts).
Other: fever, malaise, lymphadenopathy, patchy “moth-eaten” alopecia.
Labs: screen with RPR/VDRL → confirm with FTA-ABS/TP-PA.
Quick checks
Act III: Tertiary Syphilis — “Slow Bombs”
Gummas: rubbery, destructive granulomas (“slow bombs”).
Cardio: Aortitis from vasa vasorum destruction → ascending aneurysm, tree-bark aorta.
Neuro:
Tabes dorsalis (posterior column damage → lightning pains, sensory ataxia, +Romberg),
general paresis (personality/memory changes, dementia),
stroke without HTN.
Eye sign: Argyll Robertson pupil — “accommodates for reading but won’t react to light”
(aka the “prostitute’s pupil” mnemonic).
Neurosyphilis testing: CSF VDRL/FTA-ABS/PCR.
Quick checks
Congenital Syphilis — “The Early Rescue Rule”
Prevention: treat mom with penicillin early (transmission after 1st trimester).
Findings:
Snuffles (bloody nasal discharge),
Saddle nose,
Rhagades (linear perioral scars),
Hutchinson teeth & mulberry molars,
saber shins,
short maxilla,
CN VIII deafness.
Quick checks
⏱️ 60-second Drill
Teach this to a friend once; you’ll remember it for exams and wards.