32 String test（弦線試驗）通常用於鑑定那一類細菌，且所用之試劑為何？
(A) Vibrio spp.，0.5% sodium deoxycholate
(B) Neisseria spp.，2% sodium deoxycholate
(C) Enterococcus spp.，6.5% sodium chloride
(D) Streptococcus spp.，10% sodium deoxycholate

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統計： A(25), B(5), C(6), D(4), E(0) #1279024

詳解 (共 2 筆)

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String test is used to separate Vibrio spp. from Aeromonas spp. and P. shigelloides.

String test is used to differentiate Vibrio cholerae (string test positive) from other Vibrio spp. (string test negative).                                                                                                  

步驟    

1. Take a clean grease free slide and add a drop of 0.5% sodium deoxycholate or Sodium taurocholate.

2.  Emulsify an organism in the slide using an inoculating loop.

3.  Keep on rubbing the loop vigorously for 2-3 minutes until the liquid appears viscous.

4.  Then, pull the inoculating loop upwards from the slide.

5.  Observe for a mucoid “string”.

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