![]() ![]() contains 4 key components that make it selective for Salmonella & Shigella i.e. ⇒ Similarly, the Salmonella – Shigella Agar medium is also a selective medium for Shigella dysenteriae & other species of Shigella as well as Salmonella spp. contains Deoxycholate and Citrate salts in a concentration that inhibits the growth of many gram-positive bacteria & most of the intestinal flora and supports the growth of Shigella dysenteriae. ⇒ The Deoxycholate Citrate Agar (DCA) medium is the Selective medium for Shigella dysenteriae & other Shigella Species as well as Salmonella Spp. MORPHOLOGY AND CULTURE CHARACTERISTICS OF SALMONELLA TYPHI (S. The Liquid medium (Trypticase Soy Broth, Nutrient broth, etc.)Ĭheck out the Morphology & Culture Characteristics of Salmonella typhi.Selenite F Broth ( Selective medium for Salmonella & Shigella).Xylose Lysine Deoxycholate (XLD) medium ( Selective medium for Salmonella & Shigella).Salmonella – Shigella Agar medium ( Selective medium for Salmonella & Shigella).Deoxycholate Citrate Agar (DCA) medium ( Selective medium for Salmonella & Shigella).dysenteriae) in the laboratory and most commonly the MacConkey Agar medium, XLD medium and Selenite F broth medium is used which may vary as per the SOPs of the laboratory, the other media are as follows – ⇒ There are various culture media used for the cultivation of Shigella dysenteriae (Sh. grow best in the presence of oxygen and it is also a Facultative anaerobic organism i.e. dysenteriae) is an aerobic bacterium i.e. ⇒ Oxygen requirements – Shigella dysenteriae (Sh. Also, the pH requirement varies as per the strain of Escherichia col. dysenteriae cannot survive at acidic pH below 4.5, the maximum growth observed at 7.0 i.e. ⇒ Optimum temperature – Shigella dysenteriae ranges from 10–40☌ but the optimum temperature for most of the strains is 37☌ and usually cultivated at this temperature in laboratories. Commonly the MacConkey Agar medium & XLD medium is used for the cultivation of Shigella dysenteriae in the Laboratory. ⇒ Special requirements – Shigella dysenteriae have no complex nutritional requirements and readily grow in ordinary media like Nutrient Agar medium (NAM). MORPHOLOGY OF SHIGELLA DYSENTERIAE CULTURE REQUIREMENTS OF SHIGELLA DYSENTERIAE (Sh. ![]() Gram Staining Reaction – Shigella dysenteriae is a Gram -ve (Negative) bacterium. dysenteriae is a Non-capsulated bacterium. Spores – The Shigella dysenteriae is a non–sporing bacterium.Ĭapsule – Sh. coli are non-motile.įlagella – Shigella dysenteriae is a non-flagellated bacterium. Motility – Shigella dysenteriae is a non-motile bacterium. Size – The size of Shigella dysenteriae is about 1–3 µm × 0.5 µm (micrometer).Īrrangement Of Cells – Shigella dysenteriae is arranged singly or in pairs. Shape – Shigella dysenteriae is a short, rod shape (bacillus) bacterium. That’s all about the Morphology and Culture Characteristics of Shigella dysenteriae ![]()
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