Ahmed aljohani
@LabCHMG
Followers
3
Following
0
Media
39
Statuses
61
🧪 Medical Laboratory Science Student
Joined June 2025
إلى أول اختبار في النهائي مناعة طبية الأمور تحت السيطرة. صباحيات ديسمبر
0
0
1
II. Methicillin : Used for most non-resistant strains If resistant → it's called MRSA (Methicillin-Resistant Staph. aureus). III.Vancomycin: Used to treat MRSA Strong antibiotic used in hospitals.
0
0
0
Treatment: I.Penicillin: About 95% of strains are resistant. But if it's sensitive, penicillin is the best choice.
1
0
0
Laboratory Diagnosis 3.Biochemical Tests III.DNase Test •S. aureus produces DNase → clear zone on DNase agar with HCI.
1
0
0
Laboratory Diagnosis 3.Biochemical Tests II.Coagulase Test •Positive (most important for S. aureus): • Slide coagulase: Detects bound coagulase (clumping factor). • Tube coagulase: Detects free coagulase (confirms diagnosis).
1
0
0
Laboratory Diagnosis 3.Biochemical Tests I.Catalase Test: Positive: Bubbling when H202 added (distinguishes from Streptococcus) 2H²O²→2H²O+O²
1
0
0
Laboratory Diagnosis 2. Culture Media II.Blood agar: •Colonies: Round, golden-yellow (sometimes white). •Hemolysis: B-hemolytic (clear zone around colonies).
1
0
0
Laboratory Diagnosis 2. Culture Media I.Mannitol Salt Agar (MSA): • Selective: High salt (7.5%) inhibits most other organisms. • Differential: S. aureus ferments mannitol → yellow colonies.
1
0
0
Laboratory Diagnosis 1.Microscopy •Appearance: Gram-positive cocci in grape-like clusters •Easily seen under oil immersion (1000x)
1
0
0
Genus: Staphylococcus I.Type: Gram-positive cocci II.Arrangement: Grape-like clusters III. Catalase: Positive IV.Oxygen requirement: Facultative anaerobes
1
0
0
Staphylococcus aureus — a common bacterium that can live harmlessly on our skin… until it causes infections. From simple boils to life-threatening MRSA, knowing how to treat it is crucial in medicine. 💊🦠 #Microbiology #bacterialgenome #StaphylococcusAureus #MRSA #Infection
1
0
0
1. Chylomicrons: ●Origin: Made in the intestines after a meal. ●Main content: Dietary triglycerides (very high). ●Function: Deliver fats from food to muscles and fat tissue. ●Size: Largest, least dense.
0
0
0
Structure: I. Core: Cholesterol & triglycerides (fats). II.Outer layer: Phospholipids + proteins (called apolipoproteins).
1
0
0
What are Lipoproteins? Lipoproteins are molecules made of lipids (fats) and proteins. They help transport fats like cholesterol and triglycerides through the blood - since fats can't move freely in water-based blood.
1
0
0
Your blood uses 5 types of lipoproteins to move fat & cholesterol around the body. Each one plays a different role - and some can protect your heart, while others increase risk. Let's break them down simply👇🏼 #Lipoproteins #HDL #LDL #Biochemistry #MedStudent #ClinicalBiochemist
1
0
0
1. Law of Segregation Each individual has two alleles for each trait, but only one is passed to offspring during reproduction. Example: A plant with alleles Tt (Tall/short) can pass on either T or t, not both.
0
0
0
WHO WAS GREGOR MENDEL? Gregor Mendel was an Austrian monk and scientist known as the "Father of Genetics." In the 1800s, he studied pea plants and discovered how traits are passed from parents to offspring.
1
0
0