تويت
A - NO
B - YES
C - NO
B - YES
C - NO
-
-
no
yes
yesتعليق
-
المشاركة الأصلية بواسطة عونى يوسف مشاهدة المشاركة
mesophiles grow best in temperature between 10-50
هذا للتوضيح فقط
شكرا للصبايا الرائعات
ميكروو
مرمر
الاجابات الصحيحة هى
NO
YES
YES
تعليق
-
سؤال
فى المرفقات صورة لاحد الاوساط
وهو
EMB agar
شو اللى ممكن نقولة
تعليق
-
بسم الله الرحمن الرحيم
citrate utilization test
bacteria use Na citrate as asource of carbon
Media: simmons ajar media "solid media"
normally green color in positive result convert into blue color
bromothymol blue whitch is blue color in alkaline PHwhitch is produced by utilization of citrate
EX
ositive result salmonella
negative result E.Coli
عبدالحميد فارس
ممكن حد يوضحلى كيفية وضع الصور عشان مش عارف شكراتعليق
-
]EMB
used to differentiate between lactose fermenter and non lactose fermenter especially E Coli
selective agent is eosin methyline blue
differentiate between pathogenic and non pathogenic E Coli
pathogenic E Coli give greenish color colonies with metalic sheen
nonpathogenic E Coli give greenish color colonies without metalic sheenتعليق
-
EMB agar
Eosin methylene blue agar, as the name suggests, contains the dyes eosin and methylene blue.
EMB agar is selective because the aniline dyes in this purple media inhibit growth of Gram-positive organisms.
Lactose fermenters metabolize the lactose in the media and produce acid byproducts, causing a color change in the colony.
Thus, EMB is also a differential medium.
Strong acid production by organisms such as E. coli
results in a metallic green sheen like the picture in the question.
Weaker fermentation of lactose results in
colonies with a pinkish-purple color.
Colonies of nonlactose fermenters remain colorless,
or at least are no darker than the color of the media.
تعليق
-
ما أعتقد ان باقي شيء يقال:sm196:تعليق
-
المشاركة الأصلية بواسطة Abdelhamid Fares مشاهدة المشاركة
EMB agar are selective and differential media
selective due to presence of selective agaent such as eosin and methyline blue that prevent growth of G-positive bacteria
differential
differentiate between enteric G-negative bacteria
differentiate between lactose fermenter and non-lactose fermenter
شكرا اخى عبد الحميد فارس
من المحروسة ام الدنيا مصرتعليق
-
المشاركة الأصلية بواسطة عاشقة الورد مشاهدة المشاركةEMB agar
Eosin methylene blue agar, as the name suggests, contains the dyes eosin and methylene blue.
EMB agar is selective because the aniline dyes in this purple media inhibit growth of Gram-positive organisms.
Lactose fermenters metabolize the lactose in the media and produce acid byproducts, causing a color change in the colony.
Thus, EMB is also a differential medium.
Strong acid production by organisms such as E. coli
results in a metallic green sheen like the picture in the question.
Weaker fermentation of lactose results in
colonies with a pinkish-purple color.
Colonies of nonlactose fermenters remain colorless,
or at least are no darker than the color of the media.
the green metalic sheen appear due to precipitation of methelyne blue in the media from the very high amount of acid production from fermentation
the colonies appear black colonies
e.g E.COLI
تعليق
-
استكمالا للنتائج التى ذكرتها عاشقة الورد
WEAK FERMENTATION
the colonies appear less dark surrounded by wide light color and mucoid rim
like fish eyes colony
in this case bacteria ferment lactose but produce weak acid as end products
EX.
Klebsiella
Enterobacter
واخيرا
Non-fermentation
the bacteria not have the ability to frmrnt lactose and producing acid
so
the colonies appear light colour
EX
PSEUDOMONASE
اقتضى التوضيح
يعطيكى ربى كل اللى تتمنية عاشقة الورد
تعليق
-
المشاركة الأصلية بواسطة ميكرووو مشاهدة المشاركة
حتى لو ما قلتى شى
ووجودك فى حد ذاته مصدر سعاده لينا
بتمنالك الخير كلةتعليق
-
What would be the proper way to report each of the following if they had been
Gram stained
Purple (blue), round cells(------- )
Pink (red), rod-shaped cell (------- )
Pink (red), round cells ( ---------)
Purple (blue), rod-shaped cells(------------ )
تعليق
-
G+ve cocci
G-ve rods
G-ve cocci
G+Ve rods
كذا قصدك استاذ عوني ولا انا فهمت غلط؟؟؟؟تعليق
-
هادا اصعب سؤال بتسألوا يا أستاذ عونى:sm170:
انا جوابي متل مرمرتعليق
تعليق