Doctor s’ Notes

MB342🧫||المحاضرة الرابعة : _ملاحظات المحاضرة : 🔴all members of the Enterobacteriaceae family share the Core polysaccharide (or core oligosaccharide) as a common structural component of their Lipopolysaccharide (LPS).❗MCQ❗. 🔴Escherichia coli (E. coli) is the most common cause of community-acquired urinary tract infections (UTIs)." 🔴Widal Test • It measures agglutinating antibody levels against O & H Ags. • Perform for serodiagnosis of Salmonella enteric fever. •A fourfold rise in the antibody titer between paired sera (convalescent and acute sera) is diagnostic.❗important❗.

المحاضرة الخامسة ||PT342 19_9_2026🗓️ ملاحظات المحاضرة: 🔴Irreversible injury of ischemic myocytes first occurs in the subendocardial zone.❗ 🔴2-24 ➡️Coagulative Necrosis.❗❗ 🔴 1-3days➡️Dense neutrophilic .❗❗ 🔴3-10days➡️macrophages.❗❗ 🔴When a patient presents with severe chest pain accompanied by nausea, a Myocardial Infarction (MI) must always be considered as a top differential diagnosis🫀. An MI does not always present with the classic radiation to the left arm. It frequently manifests with atypical symptoms, such as nausea, vomiting, or discomfort that mimics epigastric pain. Mistaking cardiac pain for a primary gastrointestinal issue is a critical error. Clinicians should always rule out a life-threatening MI first—typically with an ECG and cardiac enzymes—before assuming the cause is strictly epigastric. 🔴creatine kinase MB [CK-MB] isoenzyme (elevated 2-4 hrs and lasts 72 hrs) . 🔴 TROPONIN I is cardiac specific protein (elevated 4-6 hrs, and lasts 7-10 days.

المحاضرة السادسة ||PT342 21_9_2026🗓️ ملاحظات المحاضرة: 🔴 Acute rheumatic endocarditis ➡️Rheumatic vegetation:The vegetations are small (pins head), pale, sterile thrombosis firmly attached.❗ 🔴Diagnosis: There is no specific test for acute rheumatic fever. The diagnosis is made based on clinical findings when either:two major or one major with two minor of Jones criteria.❗❗ 🔴Major Criteria❗❗: _Joint involvement (arthritis). _O Looks like heart (pancarditis). _ Nodules (subcutaneous). _Erythema Marginatum. _Sydenham's chorea. 🔴Mainor Criteria❗❗: _Arthralgia . _previous rheumatic fever . _Fever . _Increased C-reactive protein. _ESR/ leukocytosis. _ECG changes. 🔴Valvular damage in chronic Rheumatic fever: The valve cusps and the corda have diffused fibrous thickening, opaque, stiff, and white, with calcifications leads to abnormalities that can result in valve stenosis or regurgitation Fibrosis commissural fusion cause “fishmouth” or “buttonhole➡️valve stenosis. Fibrosis of cusps and chorda tendinae with retraction ➡️valve regurgitation.

#MB342

MB342🧫||المحاضرة الخامسة : _ملاحظات المحاضرة : 🔴Salmonella can be associated with: Primary bacteremia Secondary bacteremia Secondary septicemia. 🔴Shigella➡️Self-limited (must give antibiotic to reduce risk of secondary spread to family members & other contacts.❗MCQ❗.. 🔴Proteus➡️Mainly cause UTI (cystitis, pyelonephritis). 🔴Bacteroides➡️Normal flora of the human URT, GIT, & genitourinary tract. 🔴In Neisseria species (N. meningitidis and N. gonorrhoeae), the outer membrane lipopolysaccharide structure—often termed Lipooligosaccharide (LOS) due to the lack of long O-antigen side chains—acts as a major virulence factor. In contrast, the Lipopolysaccharide (LPS) of Bacteroides species (such as Bacteroides fragilis) has low endotoxic activity and is not considered a major primary virulence factor.❗important❗. 🔴In Neisseria species, the endotoxin—specifically Lipooligosaccharide (LOS)—is a key virulence factor directly responsible for most of the clinical symptoms and pathophysiology observed during infection.❗MCQ❗.. 🔴Bacillus anthracis➡️Polypeptide capsule. 🔴Bacillus cereus➡️Panophthalmitis.

المحاضرة السادسة ||MB342 22_9_2026🗓️ ملاحظات المحاضرة: مهم ويجي ف الoral👩🏻‍🔬⬇️: 🔴5 Pathogenic Pyogenic Cocci, including their primary virulence factors ?: 1-Staphylococcus aureus➡️Key Virulence Factors: Coagulase. 2-Streptococcus pyogenes (Group A Streptococcus)➡️Key Virulence Factors: M protein. 3-Streptococcus pneumoniae➡️Key Virulence Factors: Polysaccharide capsule. 4-Neisseria meningitidis➡️Key Virulence Factors: Polysaccharide capsule. 5-Neisseria gonorrhoeae➡️Key Virulence Factors: Pili . 🔴Nagler’s reaction➡️important.❗❗.

#pH342

المحاضرة السادسة ||PH342 21_9_2026🗓️ ملاحظات المحاضرة: 🔴According to their source: Natural ➡️:phenanthrene group __Benzylisoquinoline group.❗MCQ❗. 🔴phenanthrene group➡️morphine,codeine, thebiane. They are spasmogenic, potent CNS action, analgesics.❗MCQ❗. 🔴Benzylisoquinoline group➡️papaverin, noscapine and narcotine. They are spamolytics, negligible CNS action, non analgesics.❗MCQ❗. 🔴Mu (\mu) and Kappa (\kappa) Opioid Receptors: -Kappa (\kappa) receptors act primarily at the spinal level. -Mu (\mu) receptors act primarily at the supraspinal level. However, both receptors exhibit a mixed action, working together simultaneously across both levels to mediate analgesia. 🔴Pharmacological action of Morphine➡️On eye: The miosis and pinpoint pupil (PPP) is a characteristic of morphine over dose.❗❗ 🔴Therapeutic uses of Morphine: Dose: a. Ordinary tablet: 30 mg daily b. Modified release tablet: 15mg twise daily. c. 10 mg S.C, 5 mg I.V to prevent hypotension. d. Break through pain: 1/6 of total daily dose❗MCQ❗.. لو الpaint ياخد ف 30 mg وخش فBreakthrough pain ف ح نعطيه 1/6 ونقسم30 ع 6 يطلع 5 ف نعطيه 5.⬅️ مهمة تجي ك مسألة بالطريقة هذه👩🏻‍🔬❗❗.. 🔴Addiction (Dependence): Drug addiction occurs more frequently with short-acting drugs because they produce rapid spikes in blood concentration, leading to intense euphoric highs and severe withdrawal symptoms. Treatment Strategy: In addiction treatment, short-acting opioids (such as morphine) are discontinued and replaced with a long-acting drug, such as methadone. 🔴Meperidine (Pethidine)➡️Opioid with antimuscarinic effect.❗MCQ❗. 🔴Fentanyl (Sublimaze)➡️It is usually used as skin patches , epidural injection.❗MCQ❗. 🔴Fentanyl (Sublimaze)➡️only safe opioid in renal failure patient..❗MCQ❗. 🔴Buprenorphine _methadone➡️treatment of opioid addicts.❗MCQ❗. 🔴of acute opioid toxicity=overdose.

المحاضرة السابعة ||MB342 26_9_2026🗓️ ملاحظات المحاضرة: 🔴Yersinia➡️Bipolar staining (Safety pin)📎❗.. 🔴Yersinia➡️Fermenter (oxidase negative), Catalase poitive❗❗ 🔴Microaerophilic➡️live in low concentration of Oxygen and high concentration of co2. 🔴Y. enterocolitica more common than Y. pseudotuberculosis. 🔴Yersinia➡️suppression of immune responce.❗MCQ❗.. 🔴Yersinia has the ability to survive and replicate extracellularly after emerging from macrophages. 🔴Humans are accidental hosts for Yersinia pestis. Plague is not transmitted from human to human, except in the case of pneumonic plague. Other forms of plague are not transmitted between humans.❗MCQ❗.. نبهت عليها الدكتورة لازم تقولك pulmonary لو تكلمت بصفة عامة ما ينتقلش من human to human لازم تحدد النوع وتقول pulmonary👩🏻‍🔬🫁❗. 🔴Peptic ulcer refers to ulcers occurring in both the stomach and the duodenum. 🔴Post-treatment confirmation of eradication is recommended for all treated patients. 🔴Helicobacter➡️Post-treatment confirmation of eradication is recommended for all treated patients. However, serology testing should never be used to confirm eradication. If an endoscopy is performed, endoscopic testing can be used. 🔴Campylobacter fetus (systemic infections)Have capsule-like protein (S protein) resistant to serum killing.❗❗.

المحاضرة الثامنة ||PT342 27_9_2026🗓️ ملاحظات المحاضرة: 🔴Dilated Cardiomyopathy➡️Most common type of cardiomyopathy. 🔴Dilated Cardiomyopathy➡️most commonly is unknown the cause. 🔴Hypertrophic Cardiomyopathy➡️In Hypertrophic Cardiomyopathy (HCM), the interventricular septum is the most common site of hypertrophy, which is typically asymmetrical and predominantly affects the left side. This asymmetrical thickening compresses the left ventricular cavity into a characteristic banana-shaped appearance. Furthermore, HCM is a leading cause of sudden cardiac death in young people and athletes on the field. 🔴Restrictive cardiomyopathy➡️Amyloidosis➡️Congo Red stain. 🔴Myxomas➡️common in adult🚶🏼‍♀️. 🔴Rhabdomyoma➡️common in children👶🏻. 🔴Rhabdomyoma➡️Morphology➡️spider cells “spider-like". 🔴Myxomas➡️Morphology➡️Microscopy➡️stellate cells.

ملاحظات المحاضرة ألاولى✍🏻 ⬇️: https://t.me/doctorsnote56/511 ملاحظات المحاضرة الثانية ✍🏻⬇️: https://t.me/doctorsnote56/515 ملاحظات المحاضرة التالثة ✍🏻⬇️: https://t.me/doctorsnote56/523 ملاحظات المحاضرة الرابعة ✍🏻⬇️: https://t.me/doctorsnote56/532 ملاحظات المحاضرة الخامسة✍🏻⬇️: https://t.me/doctorsnote56/537 ملاحظات المحاضرة السادسة✍🏻⬇️: https://t.me/doctorsnote56/538 ملاحظات المحاضرة السابعة✍🏻⬇️: https://t.me/doctorsnote56/549 ملاحظات المحاضرة الثامنة ✍🏻⬇️: https://t.me/doctorsnote56/551 https://t.me/doctorsnote56/554