Amoebic dysentery Vs Bacillary dysentery- Introduction, Differences, and Keynotes
Table of Contents
Amoebic dysentery or amoebiasis is an intestinal infection caused by a unicellular (protozoan) parasite, Entamoeba histolytica whereas bacillary dysentery or shigellosis is a bacterial disease caused by a group of non-motile bacteria called Shigella species.
The differences between Amoebic dysentery and Bacillary dysentery are as follows-
| Features | Amoebic dysentery | Bacillary dysentery |
| Epidemiology | Endemic | Epidemic |
| Symptomatology | Localized abdominal tenderness | Generalized abdominal tenderness |
| Pathology | Flask-shaped ulcer with the involvement of all coats of the intestine. | Only superficial inflammation with diffuse necrosis of mucus membrane. |
| Complication | Severe hemorrage and peritonitis. | Polyarthritis may occur. |
| Macroscopic | ||
| Number | 6-8 motions per a day | >10 motions a day |
| Amount | Relatively copious | Small |
| Odor | Offensive/fishy odor | Odorless |
| Color | Dark red (due to altered blood) | Bright Red ( because of fresh blood) |
| Nature | Blood and mucus mixed with feces | Blood and mucus, no feces |
| Reaction | Acid | Alkaline |
| Consistency | Fluid mucus not adherent to the container | Viscid mucus adherent to the bottom of the container |
| RBCs | In clumps, reddish-yellow in color | Discrete or in rouleaux, bright red in color |
| Pus cells | Scanty | Numerous |
| Macrophage | Very few | Large and numerous, many of them contain RBC and thus mistaken of Entamoeba histolytica |
| Eosinophils | Present | Scare |
| Pyknotic bodies | Very common | Nil |
| Ghost Cells | Nil | Numerous |
| Parasite | Trophozoites of Entamoeba histolytica | Nil |
| Bacteria | Many Motile bacteria | Non-motile (Since Shigella species are non-motile) |
| Charcot-Leyden (CL) Crystals | Present | Nil |
| Cultivation | ||
| Growth on MacConkey medium (MAC) | Intestinal flora may grow. | Pure culture of non-lactose fermenter colonies of Shigella may be observed. |
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