Difference Between Chlamydia and Rickettsia | Chlamydia vs Rickettsia


The key difference between Chlamydia and Rickettsia is their mode of transmission. Chlamydia transmits from person to person while Rickettsia transmits by arthropod vectors. Another main difference between Chlamydia and Rickettsia is that Chlamydia cannot produce ATP while Rickettsia can produce some ATP since they have a cytochrome system.

Chlamydia and Rickettsia are two bacterial genera of Kingdom Monera. These bacteria are gram-negative and are obligate intracellular parasites. They are only able to survive inside the host cell or organism. They are medically important since they cause different diseases to animals and humans.

Difference Between Chlamydia and Rickettsia | Chlamydia vs Rickettsia

CONTENTS

1. Overview and Key Difference
2. What is Chlamydia 
3. What is Rickettsia
4. Similarities Between Myasthenia Chlamydia and Rickettsia
5. Side by Side Comparison – Chlamydia and Rickettsia in Tabular Form
6. Summary

What is Chlamydia?

Chlamydia is a group of gram-negative bacteria which are obligate intracellular parasites of higher animals (mammals and birds). They are unable to produce ATP. Hence, they totally depend on host ATP. They have both DNA and RNA, unlike viruses. They are also able to produce proteins. However, since they are bacteria, they are susceptible to antibiotics.

Difference Between Chlamydia and Rickettsia | Chlamydia vs Rickettsia

Figure 01: Chlamydia spp.

Chlamydia trachomatis, C. pneumonia, and Chlamydophila psittaci are three species which cause serious illnesses. Conjunctivitis, cervicitis, and pneumonia are three of its common infections. The transmission of this bacteria occurs human to human.

What is Rickettsia?

Rickettsia is a genus of grams negative bacteria, which are also obligate intracellular parasites. This causes spotted fevers (Rocky mountain spotted fever) and epidemic typhus in humans. These bacteria transmit to humans via arthropod vectors.

Difference Between Chlamydia and Rickettsia | Chlamydia vs Rickettsia

Figure 02: Rickettsia

Rocky mountain spotted fever is a severe illness caused by Rickettsia, where ticks transmit the bacteria to humans and rodents. This genus has cytochrome systems. Hence they are capable of producing some ATP. But those ATPs are not enough for their survival; hence, they steal ATP from the host via ATP/ADP translocators. Furthermore, this genus multiplies by binary fission.

What are the Similarities Between Chlamydia and Rickettsia?

  • Chlamydia and Rickettsia are grams negative bacteria.
  • Both these bacteria are pathogenic microorganisms.
  • Both are obligatory intracellular parasites/pathogens.
  • These two bacteria have small, pleomorphic coccobacillary forms.
  • Both are susceptible to various antibiotics.
  • The cell wall of both bacteria resembles gram-negative cell wall.
  • Chlamydia and Rickettsia posses DNA and RNA.
  • Both groups are not able to grow in culture media that are not alive.
  • They can be grown in tissue/cell culture and embryonic egg york.
  • Both groups have the body size of large viruses.

What is the Difference Between Chlamydia and Rickettsia?

 Chlamydia vs Rickettsia

Chlamydia is a group of gram-negative bacteria and obligate intracellular parasite that transmits from person to person. Rickettsia is a group of gram-negative bacteria and obligate intracellular parasites that transmit by arthropod vectors.
Transmission
Transmits from person to person Transmits by arthropod vectors
Cytochrome
Cytochromes negative Cytochromes positive
  Metabolism
Shows anaerobic metabolism Shows aerobic metabolism
Reproduction
Has a single development cycle Multiplies by binary fission
ATP Production
Cannot produce ATP Can produce some amount of ATP, but not enough. Hence, depend on host ATP
Site of Replication
Endosomes Cytoplasm
Type of Cell Attacked
Attacks columnar epithelium Attacks endothelium

Summary – Chlamydia vs Rickettsia

Chlamydia and Rickettsia are two groups of gram-negative bacteria. Both bacterial types are obligate intracellular parasites. They are very small bacteria having the size of large viruses. Since both types cause diseases to humans, they serve as medically important bacteria. Transmission of Chlamydia occurs from person to person. Rickettsia transmits via arthropod vectors. This is the difference between Chlamydia and Rickettsia. In addition, both parasites steal energy in the form of ATP from the host via ATP/ADP translocators.

Reference:

1. “Introduction to Chlamydia and Rickettsia.” Introduction to Chlamydia and Rickettsia – Microbiology – Medbullets Step 1, Available here.
2. “Ch 12 Chlamydia, Rickettsia Etc.” Ch 12 Chlamydia, Rickettsia Etc Flashcards – Cram.com, 1 July 2009, Available here.

Image Courtesy:

1. “Chlamydia trachomatis Bacteria and the PmpD Protein (6829956633) By NIAID – Chlamydia trachomatis Bacteria and the PmpD Protein (CC BY 2.0) via Commons Wikimedia
2. “Rickettsia rickettsii” By CDC – Rocky Mountain Spotted Fever info page from the CDC (Public Domain) via Commons Wikimedia

Key Difference – Synapomorphy vs Symplesiomorphy   Evolution is considered as the change in heritable characteristics of different biological populations over time and the successive generations. It is an important aspect that develops the diversity of different biological systems. It also helps to trace and identify common ancestors from whom these organisms descendent. Synapomorphy and symplesiomorphy are two such characteristic traits that are utilized by researchers in the field of phylogenetics. Synapomorphy is a common property that is demonstrated by two or more groups of organisms that can be utilized as a property to trace and detect the most recent ancestor from whom they (both groups of organisms) descended while symplesiomorphy refers to an ancestral character or a trait that is shared by one, two or more different taxa. This is the key difference between Synapomorphy and Symplesiomorphy. CONTENTS 1. Overview and Key Difference 2. What is Synapomorphy 3. What....... READ

The key difference between C8 and C18 column is that the C8 column has Octylsilane as the stationary phase whereas the C18 column has Octadecylsilane. The C8 and C18 columns differ from each other according to the stationary phase. We use these columns in HPLC (high-performance liquid chromatography). The compounds we use in these columns have different alkyl chain lengths of silane compounds. CONTENTS 1. Overview and Key Difference 2. What is C8 Column 3. What is C18 Column 4. Side by Side Comparison – C8 vs C18 Column in Tabular Form 5. Summary What is C8 Column? C8 column is a form of column present in some HPLC apparatuses, and it has Octylsilane as its stationary phase. And, this compound in stationary phase has 8 carbon atoms in its alkyl chain. Further, it tends to retain components of the analyte less than that of the C18 column. Therefore, a.......READ

Be the first to comment

Leave a Reply

Your email address will not be published.

*