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Gram-negatif

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bakteri gram négatif Pseudomonas aeruginosa awujud batang kanti warna jambon.

Bakteri gram-négatif yaiku bakteri kang ora mempertahankanaké zat warna kristal violet nalika prosès pewarnaan Gram saéngga bakal berwarna abang yèn diamati déning mikroskop.[1] Saliyané iku, bakteri gram-positif bakal berwarna ungu.[1] bedane kalorone andedhasar marang bedane struktur dinding sèl kang béda lan bisa dinyatakake déning prosedur pewarnaan Gram.[2]. Prosedur iki tinemu nalika taun 1884 déning ilmuwan Dhènemarken kang jenenge Christian Gram lan wujud prosedur wigati sajrone klasifikasi bakteri.[3] Bakteri gram positif kaya Staphylococcus aureus (bakteri patogen kang umum ing manungsa) amung duwé membran plasma tunggal kang diubengi dinding sèl kandel wujud peptidoglikan [2]. Sekitar 90% saka dinding sèl mau kasusun déning peptidoglikan wondene turahane wujud molekul liya kang jenenge asem teikhoat.[1] Saliyané iku, bakteri gram négatif (kaya E. coli) duwé sistem membran ganda kang ngendi membran plasmane diselimuti déning membran jaba permeabel.[2] Bakteri iki duwé dinding sèl kandel wujud peptidoglikan, kang mapan ing antarané membran jero membran jabane.[2] Akeh spésies bakteri gram-négatif kang sipaté patogen, kang berarti dhèwèké mbebayani kanggo organisme inang.[4] Sifat patogen iki lumrahé berkaitan karo komponèn tertentu ing dinding sèl gram-négatif, mligi lapisan lipopolisakarida (dikenal uga kanti LPS utawa endotoksin).[4]

Penyakit

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Ing ngisor iki yaiku lelara-lelara kang bisa diakibataké bakteri Gram positif lan négatif[5]:

GramGenusPenyakit
Gram positif
Staphylococcus
Streptococcus
Enterococcus
Listeria
Bacillus
Clostridium
Mycobacterium
Propionibacterium
Mycoplasma
impetigo, keracunan makanan, bronkitis
pneumonia/radang paru, meningitis, karies gigi
enteritis
listeriosis
anthrax
tetanus, botulisme
difteri
tuberkulosis
jerawat
pneumonia
Gram négatif
Salmonella
Escherichia
Shigella
Neisseria
Bordetella
Legionella
Pseudomonas
Vibrio
Campylobacter
Helicobacter
Haemophilus
Treponema
Chlamydia
salmonelosis
gastroenteritis/radang saluran cerna
disentri
meningitis, gonorea
batuk rejan
legionnaires' disease
infeksi luka bakar
kolera
gastroenteritis
tukak lambung
bronkitis, pneumonia
sifilis
pneumonia, uretritis, trakoma

Klasifikasi

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Ing ngisor iki yaiku klasifikasi bakteri gram négatif.

Klasifikasi bakteri gram négatif.
Klasifikasi bakteri gram négatif.

deleng uga

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Cathetan sikil

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  1. a b c Madigan MT, Martinko JM, Brock TD. 2006. Brock Biology of Microorgnisms. New Jersey: Pearson Prentice Hall.
  2. a b c d Cooper GM, Hausman RE. 2007. The Cell: A Molecular Approach. 4th ed. Sunderland: Sinauer Associates, Inc.
  3. Singleton P, Sainsbury D. 2006. Dictionary of Microbiology and Molecular Biology. New Jersey: Wiley Interscience.
  4. a b Masalah sitiran: Tenger <ref> ora trep; ora ana tèks tumrap refs kanthi jeneng Prescott
  5. Hogg S. 2005. Essential Microbiology. West Sussex: John Wiley & Sons Ltd.
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Gram-negatif
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