Page 1 of 1: Q: Microbiology: Thumb Print Appearance in Culture Film

draditithegreat · Credits: 1248020 My Scrapbook

thumb print appearance in culture film smear is seen with:
bacillus anthracis
brucella sp
b.pertussis
cl. welchii?

manpreet108 · Credits: 30702 My Scrapbook

b pertussis.

manpreet108 · Credits: 30702 My Scrapbook

reference ananthnarayan for the ans above.

also seen
on culture of bordetella pertussis -
bissected pearl app,
mercury drop, aluminium paint appearance

decembermist · Credits: 41211 My Scrapbook

*Thumb print appearance, Bisected pearls or mercury drops , Aluminium Paint appearance - B. Pertussis

*Draughtsman ( Concentric Rings)______________________________________ - Pneumococci

*Medusa Head ,Frosted Glass ,Inverted Fir Tree in Stab Culture_______________ - B. Anthracis

*Swimming Growth ( Fishy or Seminal Smell)___________________________ - Proteus

*Swarm of Gnats Or Fish in Stream, funnel shaped or napiform liquifaction____ - V. Cholerae

*Safety pin appearance,Stalactite growth______________________________________ - Yersinia Pestis

*Cigar bundle ( globi ) appearance______________________________________ - M.Leprae

*Fried egg______________________________________ - Mycoplasma

* Bread crumb_______________________________________ - Actinomyces israelii

*Oil Paint_______________________________________ - Staphylococci

*School of Red fish_______________________________________ - H. ducreyi

*Daisy head colonies_______________________________________ - Corynbact gravis

*Frogs egg colonies_______________________________________ - Corynbact intermedius

*Poached egg colonies_______________________________________ - Corynbact mitis

*Fir tree growth_______________________________________ - Clostridium tetani

draditithegreat · Credits: 1248020 My Scrapbook

bissected pearl and mercury drop r colony characterstic and aluminium paint is the characterstic of its confluent growth.

Oodesh · Credits: 126 My Scrapbook

Hi!!
Just wanna know somethng

Both Casoni test and tuberculin test are hypersensitivity tests.
We inject 0.2 ml the antigen in the first and wait 30mins there's a large wheal 5cm or more with multiple pseudopodia...+ve
In the second, we inject 0.1 ml PPD intradermally again and within 48-72 hours we get an induration of 10cm or more surrounded by a zone of erythma...+ve

My quest is that y there is this difference in time, size and the lesion formed?

Can anyone please explain the basis ot these hypersensitivity reaction and these differences please?

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