Difference ()Amebic, Pyogenic, Hydatid Cyst

Question 1

Causes

Answer 1

*Amebic:
Entamoeba histolytica (protozoan parasite)
*Pyogenic:
Bacterial infection (often polymicrobial)
*Hydatid:
Echinococcus granulosus (tapeworm parasite)

Question 2

Common Route

Answer 2

*Amebic:
Feco oral
*Pyogenic:
Biliary tract infection or blood spread spread
*Hydatid:
Ingestion of eggs(dog feces) → portal vein

Question 3

Onset

Answer 3

*Amebic:
Subacute
*Pyogenic:
Acute
*Hydatid:
Chronic and may discovered accidentally

Question 4

Symptoms

Answer 4

*Amebic:
Fever, RUQ pain, diarrhea, hepatomegal
*Pyogenic:
Fever, chills, RUQ pain, sepsis
*Hydatid:
asymptomatic; may cause mass effect or rupture

Question 5

Imaging (US/CT)

Answer 5

*Amebic:
Solitary,hypoechoic, mostly in Rt lobe
*Pyogenic:
Multiple abscesses common; hypodense with rim enhancement Well
*Hydatid:
Well-defined cystic lesion, may show daughter cysts or calcification

Question 6

Serology

Answer 6

*Amebic:
Positive for E. histolytica antibodies
*Pyogenic:
Nonspecific, cultures often positive
*Hydatid:
Echinococcus serology positive

Question 7

Aspiration

Answer 7

*Amebic:
Anchovy sauce-like fluid(brown, no pus, sterile)
*Pyogenic:
Pus (culture positive)
*Hydatid:
Clear fluid ± septation; risk of anaphylaxis if cyst ruptures

Question 8

Treatment

Answer 8

Amebic:
Metronidazole 750 mg 13*10 ± aspiration
*Pyogenic:
Needle aspiration if <5cm,catheter drainage if >5cm
IV antibiotics
*Hydatid:
Albendazole ± surgery or PAIR (puncture-aspiration-injection-
reaspiration)

Question 9

Complications

Answer 9

*Amebic:
Rupture, secondary bacterial infection
*Pyogenic:
Septicemia, peritonitis.
*Hydatid:
Anaphylaxis, cyst rupture, secondary seeding

Question 10

Tlc

Answer 10

*Amebic:
No shoft to left
*Pyogenic:
Increase Tlc with shift to left
*Hydatid:
Leucopenia+esinophillia

Question 11

The following are complications of hydatid cyst EXCEPT?
A. Rupture of cysts leading to secondary daughter cysts.
B. Secondary infection with bacteria.
C. Obstructive jaundice when the biliary tree is compressed by a cyst.
D. Increased blood pressure during an anaphylactic reaction to cyst rupture.

Answer 11

D
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