Wednesday, May 10, 2017

Painful and painless genital ulcers mnemonic


Today's post is about sexually transmitted pathogens that cause (painful and painless) genital ulcers.

Causes of painful genital ulcers:
Haemophilus ducreyi (the causative agent of chancroid)
Herpes simplex virus types I and II (HSV-1 and HSV-2)

Causes of painless genital ulcers:
Treponema pallidum (the causative agent of syphilis)
Klebsiella granulomatis (the causative agent of granuloma inguinale; also known as "Donovanosis")
Chlamydia trachomatis serovars L1-3 (the causative agents of lymphogranuloma venereum; LGV)

And now, mnemonics for everybody! Wohhooo!

Haemophilus ducreyi ulcer (the causative agent of painful chancroid) mnemonic:
You "do cry" with "ducreyi" infection.
"Chan cried" because he had a "chan-croid". 

How I remember herpes causes painful genital ulcers:

herPes is Painful. Because both have a P. 

Remember that ulcers of syphilis (chancres) are painless:
You can remember this as "sy - P for pain - less". 
Instead of syphilis, you say syphi-less. For painless. 

Similarly, for granuloma inguinale, aka Donovanosis:
Call it inguina-less, for painless. 
Do-NO-van-osis, Do-No-pain-osis.

Lymphogranuloma venereum causes painless ulcers mnemonic:
I remember L for Less. LGV is painless.
Remember that even though ulcers of LGV are painless, buboes are painful (lymphadenopathy).

That's all! 


  1. Why are people stressing with remembering this!?
    All the painful genital ulcers start with H (herpes, hemophilus) and all the rest are painless.
    There. No need for a mnemonic for this.

  2. After seeing this mnemonic it has bcome a cake walk tq, continue with ur amazing work.

  3. No.. chancroid is also a painful genital ulcer


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