unknown2-1

unknown2-1 - Unknown # 2 Date: 3/31/08 Tube # 12 Unknown...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Unknown # 2 Date: 3/31/08 Tube # 12 Unknown Should Have Been: Proteus vulgaris and Salmonella Grading: Possible Received 1. Description of the test performed 5 _______ (Purpose, equations, what it is) 2. Description of the positive/negative Results for the test (what should we be 5 _______ 3. How your organisms responded to each 5 _______ Test 4. How you deduced what organism you 5 _______ Have Points Possible 20 Points Received _________ Comments:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction: The four possible unknowns that could have been obtained for unknown number two were: E. coli , Proteus vulgaris, Salmonella, and Shigella. For this unknown, everyone had either Salmonella or Shigella and Proteus vulgaris or E.coli so that everyone had a mixture of two unknowns. The principle I used to differentiate between the various organisms was the H2S produced by the Salmonella on the HE plate as well as the fact that it tests positive for urease. For Proteus vulgaris , I differentiated it from the other organisms because it only ferments lactose and E. coli does not. This made it quite obvious that my unknowns were Proteus vulgaris and Salmonella because P. vulgaris fermented lactose and Salmonella produced H2S on the HE plate. I was successful in finding Proteus vulgaris and Salmonella as my two unknowns because of the MC plate and the HE plate. Results: From left to right: MacConkey’s (MC) Agar, Hektoen Enteric (HE) Agar, Xylose Lysine Desoxycholate (XLD) Agar, Russel Double Sugar (RDS) Slant. On the MC plate, whitish-clear colonies appeared as well as pinkish- red colonies. On the HE plate, green colonies with black centers appeared. On the XLD plate, pinkish-red colonies with black centers appeared. On the RDS slant, there was pink on the top and yellow on the bottom.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/07/2008 for the course MIC 206 taught by Professor Harris during the Spring '08 term at ASU.

Page1 / 4

unknown2-1 - Unknown # 2 Date: 3/31/08 Tube # 12 Unknown...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online