- رُكْـنُ الْجَامِعَـةِ

Answer: B --- 25. Which stain is used for permanent mounting of protozoa? A) BMB B) Trichrome C) Saline D) Iodine Answer: B --- 26. How is BMB stain prepared? A) Dissolve 0.3g methylene blue in 100mL distilled water + phosphate buffer pH 6.8 B) Dissolve 1g methylene blue in 50mL alcohol C) Mix iodine and potassium iodide D) Dissolve eosin in water Answer: A --- 27. After applying BMB stain, the slide should be examined: A) After 24 hours B) Immediately C) After heating D) After freezing Answer: B --- 28. BMB stain is NOT suitable for: A) Fresh stool B) Rapid examination C) Permanent slides D) Detecting trophozoites Answer: C --- 29. Ingested RBCs inside trophozoites appear as: A) Light blue circles B) Dark round bodies C) Green granules D) Yellow vacuoles Answer: B --- 30. Which microscope objective is used for scanning BMB-stained slides? A) 4x B) 10x (low power) C) 100x oil D) 40x only Answer: B --- Lecture 8: Concentration Methods 31. The main purpose of concentration methods is to: A) Kill parasites B) Increase the number of parasites per microscopic field C) Stain parasites D) Preserve parasites Answer: B --- 32. Concentration methods are especially important for: A) Heavy infections B) Light infections and intermittent shedding C) Blood parasites only D) Urine parasites Answer: B --- 33. Which principle is used in sedimentation methods? A) Parasites float to the surface B) Parasites settle at the bottom due to gravity or centrifugation C) Parasites are destroyed D) Parasites change color Answer: B --- 34. Which of the following is a sedimentation technique? A) Zinc sulfate flotation B) Saturated salt flotation C) Formalin-ether method D) Sheather’s sugar flotation Answer: C --- 35. In formalin-ether sedimentation, after centrifugation, where are the parasites found? A) Ether layer (top) B) Debris plug C) Sediment (bottom) D) Formalin layer Answer: C --- 36. Flotation methods use a solution with specific gravity: A) Lower than parasites B) Higher than parasites C) Equal to water D) Zero Answer: B --- 37. Which of the following is a flotation technique? A) Formalin-ethyl acetate B) Zinc sulfate flotation C) Direct wet mount D) Kato-Katz Answer: B --- 38. A disadvantage of flotation methods is: A) Heavy eggs may not float B) Too much fecal debris C) Cannot detect protozoan cysts D) Requires fresh stool only Answer: A --- 39. Which method provides a cleaner preparation with less fecal debris? A) Direct wet mount B) Sedimentation C) Flotation D) Permanent stain Answer: C --- 40. Formalin-ether sedimentation is effective for detecting: A) Only helminth eggs B) Only protozoan cysts C) Helminth eggs, protozoan cysts, and larvae D) Only trophozoites Answer: C --- 41. A disadvantage of sedimentation methods is: A) Low sensitivity B) Fecal debris may remain, and ether is flammable/toxic C) Cannot detect larvae D) Too expensive Answer: B --- 42. Zinc sulfate flotation is good for: A) Heavy helminth eggs B) Protozoan cysts C) Blood parasites D) Trophozoites Answer: B --- 43. Concentration methods reduce: A) Sensitivity B) False-negative results C) Parasite numbers D) Diagnostic accuracy Answer: B --- 44. In the formalin-ether method, what is the purpose of adding ether? A) To preserve parasites B) To dissolve fecal fats and debris, allowing parasites to sediment C) To stain parasites D) To float parasites Answer: B --- 45. Which statement about concentration methods is TRUE? A) They are not useful for routine screening B) They increase sensitivity and reduce false negatives C) They are only for helminths D) They destroy all parasites Answer: B --- Lecture 9: Artifacts in Fecal Specimens & Kato-Katz Method 46. The Kato-Katz method is used for: A) Diagnosing blood parasites B) Qualitative and semiquantitative diagnosis of intestinal helminths C) Detecting protozoan trophozoites D) Viral detection Answer: B --- 47. Kato-Katz is recommended by WHO for areas with: A) Low transmission of STH (<20%) B) Moderate to high transmission of STH (>20-50%)

Lecture 6: Laboratory Diagnosis of Enteric Protozoa 1. Which of the following is NOT a common enteric protozoan? A) Entamoeba histolytica B) Giardia lamblia C) Plasmodium falciparum D) Balantidium coli Answer: C --- 2. The trophozoite stage of enteric protozoa is usually found in: A) Formed stool B) Liquid or diarrheic stool C) Blood D) Urine Answer: B --- 3. The cyst stage of enteric protozoa is usually found in: A) Liquid stool B) Formed stool C) Sputum D) CSF Answer: B --- 4. Which stage is infective and resistant to the external environment? A) Trophozoite B) Cyst C) Both D) Neither Answer: B --- 5. What is the primary advantage of direct microscopic examination for enteric protozoa? A) High sensitivity in light infections B) Ability to detect motility C) No need for fresh specimens D) Detects all parasites equally Answer: B --- 6. Which technique increases the likelihood of detecting protozoa by separating them from fecal debris? A) Direct wet mount B) Concentration techniques C) Antigen detection D) Molecular methods Answer: B --- 7. Which concentration method is mentioned in the lecture? A) Formalin-ether sedimentation B) Simple centrifugation only C) Salt flotation only D) Sugar flotation Answer: A --- 8. Permanent stained smears are used to: A) Detect motility B) Study detailed morphology, especially nuclear structures C) Concentrate parasites D) Detect antigens Answer: B --- 9. Which stain is commonly used for permanent smears of protozoa? A) Giemsa B) Trichrome stain C) Gram stain D) Ziehl-Neelsen Answer: B --- 10. Antigen detection methods for enteric protozoa are based on: A) PCR B) Immunological techniques (e.g., ELISA) C) Microscopy D) Culture Answer: B --- 11. Which method is highly sensitive and specific for detecting protozoan DNA? A) Antigen detection B) Direct wet mount C) Molecular methods (PCR) D) Concentration techniques Answer: C --- 12. A major disadvantage of direct microscopy for enteric protozoa is: A) High cost B) Low sensitivity in light infections C) Cannot detect cysts D) Requires special equipment Answer: B --- 13. Which method can differentiate pathogenic from non-pathogenic protozoan species? A) Direct wet mount B) Concentration techniques C) Permanent stained smear D) Molecular methods Answer: D --- 14. Which specimen is required for motility observation of trophozoites? A) Preserved stool B) Fresh stool C) Frozen stool D) Stool in formalin Answer: B --- 15. Enteric protozoa are a major cause of: A) Respiratory disease B) Diarrheal diseases worldwide C) Neurological disorders D) Skin ulcers Answer: B --- Lecture 7: Buffered Methylene Blue (BMB) Stain for Amoebic Trophozoites 16. Buffered Methylene Blue (BMB) stain is used to detect: A) Helminth eggs B) Amoebic trophozoites, especially Entamoeba histolytica C) Protozoan cysts only D) Bacteria Answer: B --- 17. What is the key diagnostic feature of Entamoeba histolytica seen with BMB stain? A) Motility B) Ingested red blood cells inside trophozoites C) Multiple nuclei D) Glycogen vacuoles Answer: B --- 18. The pH of the buffer used in BMB stain is: A) 4.5 B) 6.8 C) 7.4 D) 8.0 Answer: B --- 19. In BMB stain, the cytoplasm of amoebic trophozoites appears: A) Deep blue B) Light blue C) Pink D) Colorless Answer: B --- 20. The nucleus of amoebic trophozoites stains which color with BMB? A) Light blue B) Pink C) Deep blue D) Brown Answer: C --- 21. BMB stain is most useful for: A) Preserved stool specimens B) Fresh stool specimens C) Blood samples D) Urine samples Answer: B --- 22. Which statement about BMB stain is FALSE? A) It is rapid and simple B) It is suitable for permanent slides C) It is low cost D) It enhances nuclear and cytoplasmic details Answer: B --- 23. The presence of ingested RBCs inside trophozoites is pathognomonic for: A) Giardia lamblia B) Entamoeba coli C) Entamoeba histolytica D) Balantidium coli Answer: C --- 24. BMB stain is especially helpful in: A) Chronic amoebiasis B) Acute amoebic dysentery C) Asymptomatic cyst passers D) Viral gastroenteritis

اليوم للصبح 🫠

A) Permanent staining B) Concentration techniques C) Preserving protozoan morphology D) Preparing trichrome smears Answer: B --- 73. Which preservative has moderate toxicity and is inexpensive and widely available? A) Schaudinn’s B) PVA C) Formalin D) Carnoy’s Answer: C --- 74. The choice of preservative depends on: A) Type of parasite B) Diagnostic method used C) Duration of specimen storage D) All of the above Answer: D --- 75. Which comparison is correct according to the lecture table? A) Formalin is best for protozoa B) PVA is best for concentration C) Schaudinn’s has high toxicity D) Formalin is not suitable for helminths Answer: C

Which solution preserves motility of trophozoites? A) Iodine B) Saline C) Eosin D) Formalin Answer: B --- 48. Iodine wet mount is used primarily to: A) Preserve motility B) Enhance nuclear details and stain glycogen C) Differentiate living from dead organisms D) Concentrate parasites Answer: B --- 49. What is a disadvantage of iodine wet mount? A) Kills trophozoites (no motility) B) Too expensive C) Does not stain anything D) Requires special equipment Answer: A --- 50. Eosin solution is best used for: A) Identifying protozoan cysts B) Viability assessment (living vs. dead organisms) C) Preserving helminth eggs D) Concentration techniques Answer: B --- 51. Which solution would you use to observe motile trophozoites? A) Iodine B) Eosin C) Saline D) Formalin Answer: C --- 52. Lugol’s iodine contains: A) Iodine and distilled water only B) Iodine, potassium iodide, and distilled water C) Iodine and alcohol D) Iodine and acetic acid Answer: B --- 53. Dead organisms absorb which stain? A) Iodine B) Saline C) Eosin D) Methylene blue Answer: C --- 54. Which solution is NOT suitable for observing motility? A) Saline B) Iodine C) Both A and B allow motility D) Neither A nor B allows motility Answer: B --- 55. Iodine wet mount causes which artifact over time? A) Enhanced motility B) Shrinkage of organisms C) Swelling of cysts D) No change Answer: B --- 56. Saline wet mount poorly visualizes: A) Helminth eggs B) Larvae C) Internal structures like nuclei D) Motility Answer: C --- 57. Eosin is an example of: A) Basic dye B) Acidic dye C) Neutral dye D) Fixative Answer: B --- 58. Which wet mount solution is best for detecting protozoan cysts? A) Saline B) Eosin C) Iodine D) Water Answer: C --- 59. The concentration of formalin used as preservative is usually: A) 1-2% B) 5-10% C) 20-30% D) 50% Answer: B --- 60. Which statement about eosin is TRUE? A) It preserves motility B) It stains live organisms pink C) Dead organisms appear stained, live organisms remain unstained D) It enhances nuclear details of cysts Answer: C --- Lecture 5: Preservatives and Fixatives – Formalin, PVA, Schaudinn’s 61. Which preservative is best for preserving helminth eggs and larvae? A) PVA B) Schaudinn’s fixative C) Formalin (5-10%) D) Eosin Answer: C --- 62. PVA fixative is primarily used for: A) Concentration techniques B) Preserving protozoan trophozoites and cysts for permanent stained smears C) Preserving helminth eggs D) Blood parasites Answer: B --- 63. Which fixative provides excellent nuclear detail for protozoa but is highly toxic due to mercury? A) Formalin B) PVA C) Schaudinn’s fixative D) Saline Answer: C --- 64. Formalin is NOT suitable for: A) Concentration methods B) Preservation of helminth eggs C) Permanent stained smears of protozoa D) Long-term storage Answer: C --- 65. Which of the following is NOT a component of Schaudinn’s fixative? A) Mercuric chloride B) Absolute alcohol C) Acetic acid D) Formaldehyde Answer: D --- 66. PVA fixative is ideal for which staining method? A) Giemsa stain B) Trichrome stain or Iron hematoxylin C) Ziehl-Neelsen stain D) Gram stain Answer: B --- 67. Which preservative is toxic and requires special disposal? A) 10% formalin B) PVA (if mercury-containing) and Schaudinn’s fixative C) Saline D) Iodine Answer: B --- 68. Which preservative can be used for both preservation and concentration (e.g., formalin-ether method)? A) PVA B) Schaudinn’s C) Formalin D) Eosin Answer: C --- 69. Schaudinn’s fixative is considered a gold standard for: A) Helminth egg preservation B) Detailed morphological study of protozoa C) Blood smear fixation D) Urine sediment preservation Answer: B --- 70. Which fixative rapidly penetrates cells and preserves nuclear details but contains mercury? A) Formalin B) PVA C) Schaudinn’s D) Alcohol alone Answer: C --- 71. For long-term storage of stool for helminth egg detection, the best choice is: A) PVA B) 10% formalin C) Schaudinn’s D) Distilled water Answer: B --- 72. PVA fixative is NOT suitable for:

Which of the following interferes with stool collection for parasitology? A) Drinking water B) Recent use of antibiotics C) Eating bread D) Walking before collection Answer: B --- 23. Contamination of stool with which substance is NOT acceptable? A) Urine B) Water C) Soil D) All of the above Answer: D --- 24. Barium used in radiologic studies interferes with stool examination because it: A) Kills trophozoites B) Increases parasite motility C) Interferes with microscopic examination D) Preserves cysts too well Answer: C --- 25. Stool should be collected: A) After starting antiparasitic treatment B) Before starting antiparasitic treatment C) After taking laxatives D) Only in the evening Answer: B --- 26. If immediate examination of stool is not possible, you should: A) Refrigerate without preservative B) Use preservatives like formalin or PVA C) Freeze the sample D) Add water to keep it moist Answer: B --- 27. Which preservative is NOT mentioned for stool transport? A) Formalin B) PVA C) Ethanol D) Both A and B are mentioned Answer: C --- 28. What portion of stool is preferred for collection? A) The surface layer B) A portion containing mucus or blood C) Only the formed part D) Only the watery part Answer: B --- 29. Why should laxatives or enemas be avoided before stool collection? A) They increase parasite number B) They dilute stool and wash away parasites C) They kill all parasites D) They change stool color Answer: B --- 30. Clinical evaluation alone is sufficient to diagnose parasitic infections. A) True B) False Answer: B --- Lecture 3: Macroscopic and Microscopic Examination of Stool 31. Which consistency of stool most commonly contains trophozoites? A) Formed stool B) Semi-formed stool C) Watery stool D) Hard stool Answer: C --- 32. Black-colored stool may indicate: A) Biliary obstruction B) Rapid intestinal transit C) Bleeding (e.g., hookworm) D) Normal finding Answer: C --- 33. Presence of mucus in stool suggests: A) Constipation B) Intestinal irritation or protozoal infection C) Normal finding D) Bacterial overgrowth only Answer: B --- 34. Which parasite is associated with blood in stool? A) Ascaris lumbricoides B) Entamoeba histolytica C) Giardia lamblia D) Enterobius vermicularis Answer: B --- 35. Adult worms of which parasite can be seen macroscopically in stool? A) Entamoeba histolytica B) Giardia lamblia C) Ascaris lumbricoides D) Cryptosporidium parvum Answer: C --- 36. Which objective lens is used to scan a wet mount for parasites? A) 4x B) 10x C) 40x D) 100x (oil) Answer: B --- 37. Which objective lens is used for detailed identification of parasites? A) 10x B) 40x C) 100x (oil) D) Both B and C Answer: D --- 38. Protozoan cysts are usually found in: A) Watery stool B) Formed stool C) Blood D) Urine Answer: B --- 39. Protozoan trophozoites are usually found in: A) Formed stool B) Liquid stool C) Sputum D) CSF Answer: B --- 40. What is a major limitation of direct microscopy? A) It is too expensive B) Low sensitivity in light infections C) Cannot detect helminth eggs D) Requires special dyes always Answer: B --- 41. Identification of helminth eggs is based on all EXCEPT: A) Size B) Shape C) Patient’s age D) Presence of operculum or spine Answer: C --- 42. Which of the following is NOT visible by direct wet mount? A) Ova of Ascaris B) Larvae of Strongyloides C) Internal DNA sequence of parasite D) Trophozoites of Giardia Answer: C --- 43. Stool examination can help in: A) Confirming intestinal parasitosis B) Guiding treatment C) Epidemiological studies D) All of the above Answer: D --- 44. Which type of stool contains both cysts and trophozoites? A) Formed only B) Watery only C) Semi-formed D) Hard pellets Answer: C --- 45. Pale or clay-colored stool suggests: A) Bleeding B) Biliary obstruction C) Rapid transit D) Normal finding Answer: B --- Lecture 4: Wet Mount Solutions – Saline, Iodine, Eosin 46. What concentration of NaCl is used in saline wet mount? A) 0.45% B) 0.85% C) 1.5% D) 5% Answer: B --- 47.

Lecture 1: Introduction to Diagnostic Medical Parasitology, Lab Safety, Microscope Care, Specimens 1. What is the main goal of diagnostic medical parasitology? A) To treat parasitic infections B) To identify the causative parasite, determine the stage of infection, and assist in treatment C) To study parasite morphology only D) To culture all parasites in the laboratory Answer: B --- 2. Which of the following is NOT a reason parasitic infections are common in developing countries? A) Poor sanitation B) Contaminated water and food C) Widespread use of antiparasitic drugs D) Inadequate health education Answer: C --- 3. According to biosafety guidelines, all clinical specimens should be considered: A) Safe if from healthy patients B) Potentially infectious C) Sterile D) Non-hazardous after 24 hours Answer: B --- 4. Which of the following is NOT mentioned as personal protective equipment (PPE) in the lab? A) Lab coat B) Gloves C) Face mask D) Safety goggles Answer: D (Not explicitly listed; the text mentions lab coat, gloves, face mask) --- 5. What should you NEVER do in a parasitology laboratory? A) Wash hands after handling specimens B) Use mouth pipetting C) Disinfect work surfaces D) Wear gloves Answer: B --- 6. How should microscope lenses be cleaned? A) With a paper towel B) With lens paper only C) With a cotton swab and alcohol D) With a dry cloth Answer: B --- 7. Which specimen is commonly used to detect malaria parasites? A) Stool B) Urine C) Blood D) Sputum Answer: C --- 8. Which parasite is detected using sputum examination? A) Entamoeba histolytica B) Paragonimus westermani C) Trypanosoma brucei D) Leishmania donovani Answer: B --- 9. For which parasite is cerebrospinal fluid (CSF) the recommended specimen? A) Plasmodium falciparum B) Trypanosoma brucei C) Giardia lamblia D) Ascaris lumbricoides Answer: B --- 10. Which specimen is used for diagnosing cutaneous leishmaniasis? A) Blood B) Urine C) Skin scraping D) Stool Answer: C --- 11. What is the most important tool in parasitology laboratories? A) Centrifuge B) Microscope C) Autoclave D) Incubator Answer: B --- 12. Which of the following is a correct rule for microscope care? A) Use immersion oil and leave it on overnight B) Carry the microscope with one hand C) Remove immersion oil immediately after use D) Touch lenses with fingers to clean them Answer: C --- 13. Why should you cover the microscope when not in use? A) To save electricity B) To prevent dust accumulation C) To cool down the lens D) To hide it from others Answer: B --- 14. Tissue biopsy is used for diagnosing all of the following EXCEPT: A) Trichinosis B) Leishmaniasis C) Giardiasis D) None of the above Answer: C (Giardiasis is diagnosed by stool) --- 15. Which of the following is NOT a common specimen in parasitology? A) Stool B) Blood C) Hair D) Urine Answer: C --- Lecture 2: Strategies for Diagnosis, Stool Collection, Transport, Interfering Factors, Precautions 16. Which diagnostic strategy is the most definitive for parasitic infections? A) Clinical evaluation B) Serological methods C) Direct parasitological methods (microscopy) D) Molecular methods Answer: C --- 17. Concentration techniques are useful when: A) Parasites are present in high numbers B) Parasites are present in low numbers C) Stool is contaminated with urine D) The patient is asymptomatic Answer: B --- 18. Which of the following is an example of a molecular diagnostic method? A) ELISA B) PCR C) Direct wet mount D) Iodine stain Answer: B --- 19. What type of stool specimen should be examined within 30 minutes? A) Formed stool B) Liquid stool C) Stool preserved in formalin D) Stool kept at 4°C Answer: B --- 20. Formed stool should be examined within: A) 30 minutes B) 1 hour C) 2 hours D) 24 hours Answer: B --- 21. Why should multiple stool samples (e.g., 3 on different days) be collected? A) To increase patient compliance B) To increase diagnostic accuracy C) To reduce laboratory workload D) To avoid using preservatives Answer: B --- 22.

🛑 كلام احد طلاب الفرات ✨🌝

العام ماجان اكو طفيليات وزاري مالنا علاقة بحقيبة قديمة و مدري شنو هي حقيبتنا نفسها حقيبة العملي و حقيبة النظري مال هاي السنة نلتزم بيهن و نقراهن بتركيز بس المعلومات الي دزتهم برساله الفوك انو نطلع البيوضة و الولودة من الطفيليات و مراحل الاصابة و غيرها هاي اسئلة إضافية نروح نبحث عنها سواء بالحقيبة ندزها للجات جي بي تي و نطلع الاجابه او خارج الحقيبة بالجات جي بي تي و نطلع اجاباتها سواء بالحقيبة او خارجها بس ارجع و اكول الحقائب كول للطلاب تقراهن حقيبة العملي و حقيبة النظري زين و بتركيز

🛑 كلام مهم بخصوص امتحان الطفيليات نقلا عن احد الطلبة في الفرات الاوسط ✨🌝

السلام عليكم اليوم محاجيهم الدكتور شايفين اسئلة الطفيليات صعبة نوعا ما وجاية اسئلة اني ما مامطرق الكم بيها بالشرح لان شفتها صعبة ف انتو ركزو من تقرون واريدكم اول شي تقرون ملزمة النظري وتركزون ع الجداول والعملي اخير محاضرتين كلش مهمات وتشخيص البيوض تحت المجهر وخاصة الديدان بالمواضيع الاخيرة وتقرون العملي الربد تيست والمواد الحافظة والصبغات والتراكيز تمرون عليهن مرور الكرام وكالت بعد ما تقرون هذا كله ويصير الكم مجال ترجعون ع المنهج القديم تضيفون ع القريتو بس ما اريدكم تتشتتون هنا هنا لا ركزو زين وهذني الي جبتهن مال البيوضة والولودة  والنواقل وطرق الانتقال ف ركزو زين من تقرون اقروا الحقيبه كلها حقيبة النظري و حقيبة العملي زين و بتركيز

الله بالخير ✨🌚

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