Module 10 | الوحدة 10

Objectives for module 10: Chlamydiae and Chlamydophila

Upon completion of this part, students should be able to:

  • Describe each of the genera named above and list their pathogenic species;
  • Describe the mode of transmission, clinical findings, the morphology and identification (diagnostic tests) for each of them;
  • List some effective antibiotics against each of them

Components: lectures (see below); online exercises and feedback form plus innovation, creativity and the use of higher-order thinking patterns (see below):

Lecture 1: Introduction to Chlamydiae


Lecture 2: Chlamydia trachomatis


Lecture 3: Chlamydophila

Click Here for Online Exercises & for the Feedback Form

  إنقر هنا للوصول لتمارين الوحدة الالكترونية وصندوق المقترحات

تابع جديد الوحدة وأخبار التخصص واطرح أي استفسار وناقش من خلال أدوات التواصل أدناه أو مباشرة من خلال قناة اليوتيوب

مع تمنياتي للجميع بالتوفيق والنجاح

Best wishes 

25 comments on “Module 10 | الوحدة 10

  1. Dear students,
    Hope you enjoyed the lectures. I loved the sounds of birds in the background during it . Please focus on the morphology and diagnostic features for Chlamydophila and Chlamydia. I am sure the diseases’ mode of transmission, epidemiology and clinical features are easy to remember as well.
    & Best wishes

  2. Dear Jumaan Saad,
    This can be recalled from previous lectures last semester in the course (Introduction to Laboratory Medicine)


    Reference Rage (for your information):

    Good luck and best wishes

  3. Dear Students,
    What do you think is the meaning of “Tentative Diagnosis” and how important it is in microbiology tests. Your should be able to answer this question easily after this module.

      • Salam alikum
        “Tentative Diagnosis” is what we think the disease is so we use what we think grow or stain bacteria we think is in sample

      • Salam everyone
        if we do not think we have chlamydia we do not use eggs to grow them and use normal agar and gram stain this do not get result for diagnose the disease.
        if we have idea we use test for what we think

      • Dear Students,
        You are right, and to add more depth to the concept read the notes below:

        Because each of the different microbiological tests (operations) can only diagnose a subset of the thousands of infectious agents and immunological markers that are associated with infectious diseases and microbial infections [as we have seen through out this course]. In other words, these operations vary greatly and each is used for a specific group of infectious agents (Bou et al., 2011; Pouladfar, 2012). Thus, the microbiological laboratory staff clearly benefit from an educated tentative diagnosis with respect to the most likely agent present in the sample, as this can guide them in selecting the most suitable operation (Georgiou et al., 2007; Georgiou et al., 2011). This is essential for efficient diagnosis, as detection of viruses, bacteria, fungi, helminthes, protists and arthropods requires specific operations, techniques and protocols that cannot be generalized or applied to all other species. Moreover, different tests are needed for different genera and species in each category, since no single operation will allow for the isolation or characterization of all potential infectious agents in any group of microorganisms (Corbellini, 2010). Owing to this complexity, effectiveness and efficiency of microbiological operations is largely determined by proper communication (Georgiou et al., 2007; Georgiou et al., 2011). In this respect, a tentative diagnosis is the first step in ensuring that microbiological tests produce correct and timely results. Thus, a request for microbiological diagnosis should include a tentative diagnosis or at least a differential diagnosis. For this reason, quality benchmarks mandate labeling microbiological specimens with the tentative diagnosis, alongside the patient’s identification information and the requesting physician’s name and contact details. The quantity and type of the specimen should reflect the above-mentioned tentative diagnosis. However, tentative diagnosis cannot be used by the The microbiological analyses should not be completed for the physician to start the most appropriate course of treatment based on the tentative diagnosis. Nonetheless, the laboratory personnel must keep informing the physician for their results, so that the treatment can be reevaluated properly and in a timely fashion.
        You can also read an article about this topic:

        Click to access 154_27143life110914_1045_1050.pdf

        Regards and Best Wishes

      • we need to make more tentative diagnosis to get better results. very important with bacteria like chlamydia.

  4. Good website very made study easy. Thank you.
    But I have question what is the best technique to us in finding this group in birds can we see if they are have the disease.

    Thank you much

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