Differences between Diphtheria bacillus and Diphtheroids
Table of Contents
Diphtheria bacillus is also known as Klebs-Löffler bacillus and it is a Gram-positive nonmotile, club-shaped bacillus of Corynebacterium diphtheriae. C. diphtheriae is a causative agent of Diphtheria (a serious infection of the mucous membranes of the nose and throat). Diphtheroids are non-diphtherial species and they are part of normal human skin flora having property of aerobic, non-sporulating, pleomorphic Gram-positive rods which are more uniformly stained than C. diphtheriae, lack the metachromatic granules and are arranged in a palisade manner as shown in the figure.
Differences between Diphtheria bacillus and Diphtheroids are as follows-
| S.No. | Property | Diphtheria bacillus | Diphtheroids |
| 1 | Gram Reaction | Weakly Gram-positive | Strongly Gram-positive |
| 2. | Metachromatic granules | Present | Absent |
| 3. | Arrangement of bacilli | Chinese letter pattern | Palisade arrangement |
| 4. | Pleomorphism | Present | Very little |
| 5. | Size and shape | Long and Chinese letter arrangement, slender | Short and thick bacilli |
| 6. | Culture on a basal medium like peptone water and nutrient agar | No growth | Growth |
| 7. | Tellurite blood agar | Generally rough colony | Smooth colony |
| 8. | Glucose and sucrose fermentation | Glucose only | Both glucose and sucrose |
| 9. | Toxigenicity | Positive | Negative |
| 10. | Organisms | Corynebacterium diphtheriae | Corynebacterium pseudotuberculosis, Corynebacterium renale, C. bovis, C. striatum, C. minutissimum, C. pseudodiphtheriticum, C. haemolyticum, etc |
| 11. | Pathogenicity | Highly pathogenic | Less pathogenic or commensals of the skin and mucous membranes |
| 12. | Infection | Diphtheria | Usually nosocomial infections |
Introduction Rothia is a genus of Gram-positive cocco-bacilli belonging to the Micrococcaceae family. The major…
Introduction Viral Nucleic Acid Extraction Kits are specialized laboratory tools used to isolate high-quality viral…
Introduction The NT-proBNP (N-terminal pro B-type Natriuretic Peptide) test is a vital cardiac biomarker blood…
Introduction The QuantiFERON-TB Gold Plus (QFT-Plus) is a highly sensitive fourth-generation Interferon Gamma Release Assay…
Introduction Acinetobacter lwoffii is a Gram-negative, strictly aerobic, non-motile, non-fermenting, and oxidase-negative bacterium. It belongs…
Introduction Organism: Gram-negative, encapsulated, facultative anaerobic, rod-shaped bacterium. Epidemiology: Major cause of healthcare-associated infections (HAIs)…
View Comments
It is really a nice and helpful piece of information. I’m glad that you shared this helpful information with us. Please keep us informed like this. Thanks for sharing.
You are welcome.
It is truly a nice and helpful piece of information. I¦m satisfied that you simply shared this useful information with us. Please keep us up to date like this. Thanks for sharing.
Thank you for the auspicious writeup. It in fact was a amusement account it. Look advanced to far added agreeable from you! However, how could we communicate?
Wonderful blog! I found it while browsing on Yahoo News. Do you have any tips on how to get listed in Yahoo News? I've been trying for a while but I never seem to get there! Cheers
An interesting dialogue is worth comment. I feel that you need to write extra on this topic, it won't be a taboo subject however usually people are not sufficient to speak on such topics. To the next. Cheers
What i don't realize is actually how you're not actually much more well-liked than you may be now. You're so intelligent. You realize thus considerably relating to this subject, made me personally consider it from numerous varied angles. Its like men and women aren't fascinated unless it is one thing to accomplish with Lady gaga! Your own stuffs excellent. Always maintain it up!
Great site. Lots of helpful information here. I am sending it to some friends ans additionally sharing in delicious. And certainly, thanks for your effort!
I've been browsing on-line more than 3 hours nowadays, but I by no means discovered any interesting article like yours. It's beautiful worth sufficient for me. In my opinion, if all site owners and bloggers made just right content as you did, the web might be a lot more helpful than ever before. "A winner never whines." by Paul Brown.
This is really attention-grabbing, You're an overly skilled blogger. I have joined your feed and look ahead to seeking extra of your fantastic post. Also, I have shared your web site in my social networks!
Some truly nice and utilitarian information on this web site, also I conceive the layout contains wonderful features.