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🐔 AVIAN MYCOPLASMOSIS

Exam-Oriented Complete Notes | Vet Medicine | Hindi-English Mix

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📌 INTRODUCTION (परिचय)

⭐ Exam Key Point: Mycoplasma class Mollicutes ka member hai - इसकी सबसे बड़ी खासियत है कि इसमें cell wall ABSENT होती है। इसीलिए Penicillin काम नहीं करती।

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🦠 ETIOLOGY (कारण / जीवाणु की पहचान)

• Organism: Family Mycoplasmataceae, Class Mollicutes
• Shape: Pleomorphic (बदलती हुई shape)
• Size: Smallest self-replicating prokaryotes (सबसे छोटे self-replicating bacteria)
• Special Feature: NO cell wall → Beta-lactam antibiotics ineffective
• Gram stain: Gram-negative appearance लेकिन true gram staining नहीं होती
• MG is the MOST pathogenic of all avian mycoplasmas
• Considerable strain variability exists - कुछ strains ज्यादा virulent, कुछ कम

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🌍 EPIDEMIOLOGY (महामारी विज्ञान)

• Chickens (मुर्गी) - primary host
• Turkeys (टर्की) - more susceptible, severe disease
• Game birds (तीतर, बटेर)
• Finches and other pet birds

• Transovarian (egg transmission) - infected hen के अंडे से chick में जाता है
• यही वजह है कि बीमारी पीढ़ी दर पीढ़ी चलती है

• Aerosols (हवा में सांस के साथ)
• Respiratory secretions (नाक-मुंह का स्राव)
• Fomites - infected shoes, equipment, clothes (इंसानों के जूते, कपड़े, उपकरण)
• Direct contact

⭐ Exam Tip: "Once infected, birds remain infected FOR LIFE" - ये carrier बन जाते हैं!

• Stress (overcrowding, nutritional deficiency)
• Concurrent infections: Newcastle Disease Virus, Infectious Bronchitis Virus, E. coli
• Poor ventilation
• Young age

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🔬 PATHOGENESIS (बीमारी कैसे होती है)

Mycoplasma enters via respiratory tract
         ↓
Attaches to respiratory epithelium (ciliated cells)
(Specialized organelle helps attachment)
         ↓
Prevents ciliary clearance (cilia काम करना बंद)
         ↓
Produces H₂O₂ and superoxide radicals
         ↓
Oxidative damage to host cells
         ↓
Innate immune system activation → cytokines release
         ↓
Inflammation of trachea, air sacs, sinuses, lungs
         ↓
CRD (MG) / Synovitis (MS)

• MG alone ज्यादा नुकसान नहीं करता
• जब E. coli + NDV + IBV साथ आते हैं → बहुत severe disease
• Turkeys में avian metapneumovirus के साथ synergism होता है

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🤒 CLINICAL SIGNS (लक्षण)

MG - Chronic Respiratory Disease (CRD)

• Nasal discharge (नाक से पानी/mucus)
• Rales (गले में घड़घड़ाहट) - mild to marked
• Coughing, Sneezing (खांसी, छींक)
• Conjunctivitis with frothy eyes (आंख में झाग)
• Decreased feed efficiency and weight gain
• Egg production में कमी (layers/breeders में)

• Swelling of infraorbital sinuses ⭐ (आंख के नीचे सूजन) - Pathognomonic in turkeys
• Eyelids may close due to swelling
• Wing feathers soiled (आंख से exudate पोंछने की कोशिश में)
• Conjunctivitis with frothy discharge

MS - Infectious Synovitis

• Subclinical mostly (mild rales, subclinical infection)
• Similar to MG but milder

• Lameness (लंगड़ापन) - first sign
• Pale-bluish head/comb (कलगी नीली-फीकी)
• Birds sit near feeders/drinkers (खाने-पानी के पास बैठे रहते)
• Swollen hocks and footpads ⭐ (टखने और पंजे सूजे हुए)
• Sternal bursitis (breast blisters) (सीने पर छाले)
• Depression, reduced growth
• Egg shell abnormalities (MS में)

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🏥 LESIONS (पोस्टमॉर्टम में क्या दिखता है)

• Mucoid/catarrhal/caseous exudate in nasal passages, sinuses
• Airsacculitis - air sacs cloudy, thickened with caseous material
• Tracheitis (mild mucoid initially → caseous later)
• "Pearls" - amorphous masses in air sacs (turkeys)

• Viscous, creamy-grey synovial fluid in joints
• Thickened synovium
• Sternal bursa distended

• Lymphocytic and heterophilic infiltration of synovium
• Respiratory epithelial damage, loss of cilia

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🔍 DIAGNOSIS (रोग की पहचान)

Step 1 - Sample Collection

• Tracheal swabs, choanal swabs (for respiratory)
• Joint aspirates (for synovitis)
• Infraorbital sinus aspirate
• Egg yolk / embryo samples

Step 2 - Laboratory Tests

⭐ Exam Trap: SPA is SCREENING test; HI is CONFIRMATORY test. False agglutination can occur after oil-emulsion vaccines or MS co-infection.

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💊 TREATMENT (इलाज)

⭐ Remember: Mycoplasma में cell wall नहीं है, इसलिए:

• Penicillin, Cephalosporins, Ampicillin - USELESS ❌
• Beta-lactam antibiotics काम नहीं करते

⭐ Key Limitations:

• Antibiotics decrease clinical signs लेकिन infection eliminate नहीं करते
• Can reduce egg transmission if given to breeders
• Established synovitis cases में antibiotics कम effective

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🛡️ PREVENTION & CONTROL (रोकथाम)

1. Eradication (उन्मूलन) - BEST method

• Source birds from MG/MS-free breeder flocks
• National Poultry Improvement Plan (NPIP) - US में control program
• Regular serological monitoring of breeder flocks

2. Biosecurity (जैव सुरक्षा)

• All-in, all-out management
• Disinfection of fomites (shoes, equipment)
• Visitor control

3. Vaccination (टीकाकरण)

• Live attenuated vaccines available for MG
  • F-strain (mild virulence)
  • ts-11 (temperature sensitive mutant)
  • 6/85 strain
• Vaccines used in high-challenge situations - reduce clinical signs and economic losses
• Killed/inactivated oil-emulsion vaccines also available

4. Egg Treatment

• Dipping/injecting hatching eggs in antibiotic solution to reduce vertical transmission

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📊 MG vs MS - Quick Comparison Table ⭐

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⚡ ECONOMIC IMPORTANCE (आर्थिक नुकसान)

• Reduced egg production and hatchability
• Decreased feed efficiency and weight gain
• Condemnation of carcasses at processing (MG in broilers)
• Treatment costs
• WOAH-listed disease (international significance)
• India में poultry industry को करोड़ों का नुकसान

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🎯 HIGH-YIELD EXAM POINTS (याद रखने वाली बातें)

1. No cell wall → Penicillin ineffective ❌
2. "Fried egg" colonies on PPLO media ⭐
3. MG = Most pathogenic avian mycoplasma
4. Transovarian transmission = vertical spread through eggs
5. Turkeys show infraorbital sinus swelling (MG)
6. MS causes infectious synovitis = swollen hocks + footpads
7. SPA = Screening; HI = Confirmatory ⭐
8. Real-time PCR = most sensitive/specific current test
9. Drug of choice = Tylosin (Macrolide)
10. Antibiotics treat but never eliminate infection
11. Polymicrobial disease with E. coli + NDV + IBV = severe CRD
12. Birds infected for LIFE = lifelong carriers

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🔑 ONE-LINERS FOR QUICK REVISION

• "Mycoplasma = Mollicutes = No cell wall = No penicillin"
• "MG = Sinusitis in Turkey, CRD in Chicken"
• "MS = Synovitis = Lame bird with swollen hocks"
• "Fried egg colony on PPLO = Mycoplasma ka pehchaan"
• "Tylosin is your go-to drug"
• "SPA screen karo, HI se confirm karo"

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🐣 PULLORUM DISEASE

Exam-Oriented Complete Notes | Vet Medicine | Hindi-English Mix

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📌 INTRODUCTION (परिचय)

⭐ Other Names (परीक्षा में पूछा जाता है):

• Bacillary White Diarrhea (BWD) - सबसे classic नाम
• Salmonella Pullorum infection
• White Diarrhea of Chicks

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🦠 ETIOLOGY (कारण)

⭐ Exam Trap: S. Pullorum is NON-MOTILE - यह इसे अन्य Salmonella से अलग बनाता है (ज़्यादातर Salmonella motile होते हैं)।

• S. Pullorum और S. Gallinarum (Fowl Typhoid) दोनों same serogroup D1 में हैं
• इसीलिए दोनों का antigen cross-react करता है - एक test से दोनों detect हो सकते हैं

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🌍 EPIDEMIOLOGY (महामारी विज्ञान)

• Chickens - primary host (most susceptible)
• Turkeys - second most affected
• Quail, pheasants, guinea fowl, ducks, pigeons, canaries
• Mammals भी: pigs, cattle, cats, dogs, foxes, mink (कभी-कभी)
• Zoonotic potential - humans में भी infection reported

• Most severe: < 3-4 weeks old chicks/poults ⭐
• Semi-mature and mature birds → usually subclinical carriers
• Infected flock में newly hatched chicks सबसे ज़्यादा die करते हैं

• Infected hen → egg → chick
• Infected carrier hen अपने 1/3 अंडों (33%) में bacteria transfer करती है
• Hatchery contamination से disease rapidly spread होती है
• Egg/hatchery se infected chicks → पहले कुछ दिनों से 2-3 हफ्ते में मरते हैं

• Bird-to-bird direct contact
• Fecal contamination of feed, water, litter
• Cannibalism of infected carcasses
• Wild birds, rodents, insects, flies
• Contaminated equipment, shoes (fomites)
• Farm-to-farm: poor biosecurity से

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🔬 PATHOGENESIS (बीमारी कैसे होती है)

S. Pullorum enters via:
  ↓
Egg (Vertical) OR Ingestion/Inhalation (Horizontal)
  ↓
Intestinal colonization → Mucosal invasion
  ↓
Bacteremia / Septicemia (blood में bacteria)
  ↓
Localization in organs:
Liver, Spleen, Lungs, Cecum, Joints, Ovary
  ↓
CHICKS (< 3 weeks): Acute fatal septicemia
ADULTS: Chronic carrier state (ovary/testicles)
  ↓
Adult carriers → Transovarian transmission
(cycle continues)

• Chicks में immune system immature होती है → septicemia और high mortality
• Adults में bacteria ovary में persist करते हैं → lifelong carrier
• Recovered birds = permanent carriers → इसीलिए treatment useless है

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🤒 CLINICAL SIGNS (लक्षण)

CHICKS (< 3-4 weeks) - ACUTE FORM ⭐

⭐ "Chicks huddle near heat source + white pasted vent = Pullorum Disease"

Signs पहले 5-10 दिनों तक नहीं दिखते, फिर 7-10 दिन में बढ़ते हैं, 2nd-3rd week में peak mortality

ADULT BIRDS - CHRONIC/SUBCLINICAL FORM

• Usually asymptomatic carriers (कोई लक्षण नहीं)
• Decreased egg production
• Poor hatchability
• Occasional: diarrhea, depression, dehydration

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🏥 POST-MORTEM LESIONS (मृत्यु के बाद क्या दिखता है)

Chicks (Acute):

⭐ Pathognomonic Lesion Combination: Liver necrotic foci + Grey lung nodules + Cecal caseous cores = Pullorum Disease

Adult Carriers:

⭐ Exam Point: "Atrophic, caseous ovarian follicles" = Pullorum in adult hens

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🔍 DIAGNOSIS (रोग की पहचान)

1. Clinical Diagnosis (field पर)

• History: young chicks dying in 2nd-3rd week
• White diarrhea, pasted vent, huddling
• Post-mortem: liver necrosis, lung nodules, cecal cores

2. Serological Tests (Blood Tests) ⭐

⭐ WBPA (Whole Blood Plate Agglutination) = field diagnosis ka gold standard

• Antigen (stained S. Pullorum antigen) + blood drop → agglutination = positive
• 2 negative tests, 21 days apart = flock declared clean

⭐ Cross-reaction: S. Pullorum और S. Gallinarum का common antigen है → एक test दोनों detect करता है (Pullorum-Typhoid test)

3. Definitive/Confirmatory Diagnosis

• Bacterial isolation and identification
• Culture on Blood agar, MacConkey agar, Brilliant Green agar
• Biochemical tests + Serotyping
• PCR (now NPIP-approved)

4. Samples for Isolation

• Liver, spleen, cecal cores
• Yolk sac (dead-in-shell)
• Tracheal/cloacal swabs
• Ovarian follicles (adults)

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💊 TREATMENT (इलाज)

⭐⭐ MOST IMPORTANT EXAM POINT: "Treatment is NOT RECOMMENDED" - यह pullorum disease की सबसे बड़ी खासियत है!

• Antibiotics clinical signs को reduce कर सकते हैं
• लेकिन carrier state को eliminate नहीं करते
• Recovered birds lifelong carriers बन जाते हैं
• Carrier birds अगली generation में disease transmit करते रहते हैं
• इसलिए treatment = waste of time and money

• Sulfonamides (Sulfadimidine)
• Furazolidone ⭐ (traditional drug of choice in India/exam)
• Tetracyclines
• Fluoroquinolones
• Chloramphenicol

⭐ Exam Answer for treatment: "Treatment is NOT recommended. Control is by test-and-slaughter."

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🛡️ PREVENTION & CONTROL (रोकथाम)

1. TEST AND SLAUGHTER POLICY ⭐⭐ (Most Important)

• यह Pullorum disease का cornerstone of control है
• सभी breeding flocks को routine serological testing
• Reactor birds (positive) को तुरंत slaughter करना
• यही policy US, Europe, Australia में pullorum eradicate करने में काम आई

2. National Poultry Improvement Plan (NPIP) ⭐

• US में 1930s से शुरू हुआ federal-state-industry cooperative program
• Goal: S. Pullorum को commercial flocks से eradicate करना
• इसी की वजह से US में pullorum practically eradicated है
• India में analogous programs exist

3. Clean Flock Program

• Birds only purchase from S. Pullorum-free certified flocks
• Flock को "Pullorum-Typhoid Clean" certify करने के लिए 2 negative tests (21 days apart) चाहिए

4. Hatchery Hygiene

• Hatchery disinfection (Formaldehyde fumigation)
• Infected eggs eliminate करना
• Egg dipping in antibiotic solution (limited use)

5. Biosecurity

• All-in, all-out management
• Rodent and wild bird control
• Fly control
• Visitor and equipment disinfection
• Quarantine of new birds

6. No Vaccine Available ⭐

• Pullorum disease के लिए कोई effective vaccine नहीं है
• Control purely by testing and elimination

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🔄 PULLORUM vs FOWL TYPHOID - Quick Comparison ⭐

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⚡ ZOONOTIC IMPORTANCE

• S. Pullorum humans में infection cause कर सकता है
• Particularly immunocompromised individuals में
• Reportable disease - State Veterinarian को 24 hours में report करना mandatory

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🎯 HIGH-YIELD EXAM POINTS (यह ज़रूर याद करें!)

1. BWD = Bacillary White Diarrhea = Pullorum Disease ⭐
2. Causative agent = S. Pullorum (Gram-negative, NON-MOTILE) ⭐
3. Most affected: Chicks < 3 weeks ⭐
4. Transmission: Transovarian (vertical) = PRIMARY ⭐
5. Classic signs: White pasted vent + huddling near heat ⭐
6. Peak mortality: 2nd-3rd week of life ⭐
7. Liver: necrotic foci | Lungs: grey nodules | Cecum: caseous cores ⭐
8. Adult carriers: caseous ovarian follicles ⭐
9. Diagnosis field test: WBPA (Whole Blood Plate Agglutination) ⭐
10. Treatment NOT recommended (carrier state persist करता है) ⭐⭐
11. Control = Test and Slaughter ⭐⭐
12. No vaccine available ⭐
13. S. Pullorum and S. Gallinarum = same serogroup D1 → cross-react in PT test
14. NPIP = control program (US)
15. Notifiable/Reportable disease ⭐

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🔑 ONE-LINERS FOR QUICK REVISION

• "White diarrhea in chicks = Pullorum = BWD"
• "S. Pullorum = Gram -ve, Non-motile, Host-adapted"
• "Vertical transmission = primary route"
• "Chicks huddle, white vent paste = Pullorum"
• "Treatment nahi, Test karo aur slaughter karo"
• "WBPA = field test | Isolation = gold standard"
• "Caseous ovary = carrier hen ka sign"
• "Pullorum + Fowl Typhoid = same PT test (common D1 antigen)"

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🦠 SALMONELLOSIS

Complete Exam Notes | Vet Medicine | Hindi-English Mix

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📌 INTRODUCTION (परिचय)

⭐ Definition: "Salmonellosis is infection with Salmonella spp. - clinical presentation ranges from healthy carrier state → acute/chronic enteritis → septicemia"

• सभी animals + humans में होती है → Major Public Health / Zoonotic concern ⭐
• Poultry industry में enormous economic losses
• Food safety का सबसे बड़ा खतरा (eggs, meat)
• 2500+ serotypes exist → control बहुत कठिन

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🧬 ETIOLOGY - ORGANISM की पहचान

⭐ Exam Trap: "Most Salmonella are MOTILE - S. Pullorum और S. Gallinarum NON-MOTILE हैं" - यह बार-बार पूछा जाता है!

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📊 CLASSIFICATION OF SALMONELLOSIS ⭐⭐ (Most Important for Exam)

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GROUP 1 - HOST-ADAPTED SALMONELLAE (Poultry-specific) ⭐

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GROUP 2 - HOST-ADAPTED TO OTHER ANIMALS

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GROUP 3 - PARATYPHOID / NON-HOST-ADAPTED SALMONELLAE ⭐

⭐ Exam Key: Paratyphoid Salmonellae broad host range रखते हैं - poultry में कम pathogenic लेकिन humans में food poisoning का major cause

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🌍 EPIDEMIOLOGY

Sources of Infection:

• Infected carrier animals (कोई sign नहीं, bacteria shed करते रहते हैं)
• Contaminated feed (bone meal, fish meal, meat meal)
• Contaminated water
• Wild birds, rodents, insects (flies)
• Hatcheries
• Human handlers (fomites)
• Raw/undercooked meat, eggs

Transmission Routes:

• S. Pullorum, S. Enteritidis → egg के through chick में
• Infected hen → अंडे → infected chick

• Fecal-oral route (most common for paratyphoid)
• Contaminated feed और water
• Direct bird-to-bird contact
• Aerosols, cannibalism of infected carcasses
• Hatchery contamination

Predisposing Factors (बीमारी को बढ़ाने वाले कारण):

• Young age (immune system immature)
• Stress (overcrowding, transport, weaning)
• Concurrent infections
• Poor biosecurity
• Immunosuppression
• Hot, humid weather
• Nutritional deficiency

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🔬 PATHOGENESIS (बीमारी की mechanism)

Salmonella ingested (feed/water/egg)
         ↓
Attaches to intestinal epithelium (ileum/cecum mainly)
         ↓
Invasion of intestinal mucosa via M-cells (Peyer's patches)
         ↓
Enters macrophages → survives inside phagolysosomes
(Uses Type III Secretion System - TTSS / SPI-1, SPI-2)
         ↓
Two possible outcomes:

[Young/Immunocompromised birds]          [Adults]
         ↓                                    ↓
Bacteremia / Septicemia              Localized enteritis OR
         ↓                           Subclinical carrier state
Multi-organ involvement:                      ↓
Liver, Spleen, Lungs, Heart          Cecum colonization
Yolk sac, Joints, Brain                       ↓
         ↓                           Fecal shedding
High Mortality                       (Infection source)

• Macrophage survival = virulence ka secret - bacteria phagocytosis से बचते हैं
• Inflammatory response → cytokines → diarrhea, fever
• S. Pullorum & S. Gallinarum: flagella genes absent (mutated) → TLR-5 को bypass करके enter करते हैं → less inflammation → systemic spread
• After 1 week of age - competitive intestinal flora बढ़ जाती है → susceptibility कम होती है

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🤒 CLINICAL SIGNS BY SPECIES

🐔 POULTRY - तीन अलग diseases

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A) PULLORUM DISEASE (S. Pullorum) - Already covered in detail ⭐

• Chicks < 3 weeks → White chalky diarrhea (BWD)
• Pasted vent, huddling near heat, high mortality
• Adults = asymptomatic carriers

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B) FOWL TYPHOID (S. Gallinarum) ⭐

• Liver enlarged, dark, friable with greenish-bronze discoloration
• Spleen enlarged
• Bone marrow: dark brown

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C) PARATYPHOID (S. Typhimurium, S. Enteritidis etc.)

• Watery diarrhea, weakness, huddling
• Anorexia, blindness (occasional)
• Mortality variable - usually less than pullorum

• Usually silent infection / subclinical ⭐
• Occasional mild diarrhea
• Main risk = contamination of eggs/meat for humans ⭐

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🐄 CATTLE में Salmonellosis

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🐷 PIGS में Salmonellosis

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🐎 HORSES में Salmonellosis

• Fever, acute diarrhea (profuse, watery)
• Abdominal pain → colic ⭐
• Dehydration, electrolyte imbalance
• Foals में septicemia + high mortality
• S. Typhimurium most common

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🐑 SHEEP में Salmonellosis

• Acute diarrhea, fever
• Abortion - S. Abortusovis → common cause of ovine abortion ⭐
• Septicemia in lambs

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🏥 POST-MORTEM LESIONS

Poultry (General):

Cattle/Large Animals:

• Hemorrhagic enteritis
• Mucosal ulceration (intestine)
• Enlarged, congested lymph nodes
• Petechiae on serosal surfaces
• Liver: focal necrosis
• Abortion: necrotic placenta

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🔍 DIAGNOSIS

1. Clinical Diagnosis

• Age, signs, flock history, lesions = suggestive

2. Bacteriological Culture ⭐ (Definitive/Gold Standard)

• Feces, cloacal swabs
• Cecal contents, intestine
• Liver, spleen (post-mortem)
• Blood (septicemia cases)
• Eggs, ovarian tissue

3. Serological Tests (Poultry breeding flocks)

• WBPA / SPA (Whole Blood / Serum Plate Agglutination) - Screening
• HI (Hemagglutination Inhibition) - Confirmatory
• ELISA - Surveillance

4. Molecular Tests

• PCR / Real-time PCR - Most sensitive, specific, rapid ⭐
• Now NPIP-approved for flock testing

5. Biochemical Tests

• Glucose fermentation (+), Lactose (-), H₂S (+), Motility (+/-)
• Indole (-), Urease (-)

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💊 TREATMENT

⭐ Critical Point: Treatment is CONTROVERSIAL in Salmonellosis

• Antibiotics clinical signs कम करते हैं
• लेकिन carrier state prolong हो सकती है → chronically shedding animals
• Antibiotic resistance बढ़ती है
• Poultry में eradication के लिए treatment नहीं, slaughter होता है

• IV/oral fluid therapy (dehydration correct करना)
• Electrolyte supplementation
• Probiotics (competitive exclusion)
• NSAIDs (fever control)

⭐ Poultry rule: S. Pullorum / S. Gallinarum = Treatment NOT recommended → Test and Slaughter

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🛡️ PREVENTION & CONTROL

1. Biosecurity (सबसे पहला कदम)

• All-in, all-out management
• Rodent, wild bird, fly control ⭐
• Visitor and equipment disinfection
• Separate boots, clothing for each farm unit

2. Competitive Exclusion (CE) ⭐

• Newly hatched chicks को normal gut flora से spray करना
• "Nurmi concept" - adult gut flora give to day-old chicks
• यह Salmonella के intestinal colonization को block करता है

3. Vaccination

• S. Enteritidis vaccine available (killed + live)
• Reduces egg contamination
• S. Typhimurium vaccines also available for layers
• S. Pullorum/Gallinarum के लिए कोई effective vaccine नहीं ⭐

4. Feed Hygiene

• Heat treatment of feed (pelleting, steam conditioning)
• Organic acid supplementation (formic acid, propionic acid) in feed
• Avoidance of contaminated feed ingredients

5. Hatchery Management

• Formaldehyde fumigation
• Infected eggs elimination
• Clean egg collection and storage

6. Test and Slaughter (Host-adapted serovars)

• S. Pullorum + S. Gallinarum → NPIP test-and-cull program ⭐
• Positive reactor birds को slaughter

7. HACCP and Food Safety

• Processing plant में hygiene
• Carcass decontamination (chlorine wash, organic acids)

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🌏 ZOONOTIC IMPORTANCE ⭐⭐ (Most Important Public Health)

• Gastroenteritis: Nausea, vomiting, diarrhea (watery), abdominal cramps, fever (38-39°C)
• Onset: 6-72 hours after eating contaminated food ⭐
• Duration: 4-7 days, usually self-limiting
• Severe cases: bacteremia, meningitis, focal infections

⭐ "Eggs + S. Enteritidis = biggest food safety concern worldwide"

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📊 QUICK COMPARISON TABLE ⭐⭐

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🎯 HIGH-YIELD EXAM POINTS

1. Family = Enterobacteriaceae, Gram -ve rods ⭐
2. 2500+ serovars - classified by Kauffmann-White scheme (O, H, Vi antigens)
3. S. Pullorum & S. Gallinarum = NON-MOTILE (rest are motile) ⭐⭐
4. Both S. Pullorum + S. Gallinarum = Serogroup D1 → cross-react in PT test ⭐
5. BWD = Pullorum = Chicks < 3 weeks ⭐
6. Bronze liver = Fowl Typhoid (S. Gallinarum) ⭐⭐
7. S. Enteritidis + Eggs = Human food poisoning ⭐⭐
8. Treatment = controversial (carrier state), poultry = NOT recommended ⭐
9. Test and Slaughter = control of host-adapted serovars ⭐
10. Competitive Exclusion (Nurmi concept) = prevention in day-old chicks ⭐
11. Culture media: Brilliant Green Agar (selective), TSI (K/A/H₂S+) ⭐
12. Pre-enrichment → Selective enrichment → Selective plating = culture protocol ⭐
13. NPIP = US control program for S. Pullorum + S. Gallinarum
14. Notifiable/Reportable disease ⭐
15. S. Pullorum & S. Gallinarum = minimal zoonotic risk (host-adapted)

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🔑 ONE-LINERS FOR QUICK REVISION

• "Salmonella = Enterobacteriaceae = Gram -ve rod = Mostly motile"
• "Non-motile Salmonella = Pullorum + Gallinarum"
• "D1 antigen = Pullorum + Gallinarum = same PT test"
• "Bronze liver = Fowl Typhoid = S. Gallinarum"
• "White diarrhea in chicks = BWD = Pullorum"
• "S. Enteritidis in eggs → humans food poisoning"
• "Treatment nahi → Test karo, slaughter karo (host-adapted)"
• "Nurmi concept = Competitive exclusion = CE culture"
• "BGA (Brilliant Green Agar) = selective media for Salmonella"
• "TSI = K/A/H₂S positive = Salmonella ki pehchaan"

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⚡ MINERAL DEFICIENCY - COMPLETE EXAM NOTES

Yaad Karo, Exam Mein Likhao! | Vet Medicine | Hindi-English

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📌 CLASSIFICATION FIRST (Pehle Samjho)

MINERALS
    │
    ├── MACROMINERALS (Major) - Bulk mein chahiye
    │        Ca, P, Mg, Na, K, Cl, S
    │
    └── MICROMINERALS (Trace Elements) - Thodi maat mein chahiye
             Fe, Cu, Zn, Mn, Se, I, Co, Mo, Cr

Ca - P - Mg - Na - K - Cl - S

"Fe Cup Zinc Mangal Se India Co" - Iron, Copper, Zinc, Manganese, Selenium, Iodine, Cobalt

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🧱 MACROMINERALS

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1️⃣ CALCIUM (Ca) DEFICIENCY

📍 Function (काम क्या करता है?)

• Bone और teeth formation (हड्डी + दांत)
• Muscle contraction (heart muscle भी)
• Blood clotting
• Nerve impulse transmission
• Egg shell formation (poultry में)

🐔 POULTRY में Ca Deficiency

⭐ Classic sign: Beaded ribs at vertebral attachment + soft rubbery long bones = Rickets

🐄 CATTLE/LARGE ANIMALS में Ca Deficiency

⭐ Milk Fever = Hypocalcemia = Parturient Paresis - dairy cow ka sabse important Ca deficiency

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2️⃣ PHOSPHORUS (P) DEFICIENCY

📍 Function

• Bone + teeth (Ca ke saath)
• Energy metabolism (ATP)
• Cell membrane (phospholipids)
• DNA/RNA
• Milk production

Signs Across Species:

⭐ "PICA = Phosphorus (or Sodium) ki kami ka signal" - yeh exam mein most asked sign hai

• Rickets (Ca + P + Vit D3 saath chahiye)
• Thin egg shells
• Ca:P ratio = 2:1 honi chahiye (poultry mein) ⭐

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3️⃣ MAGNESIUM (Mg) DEFICIENCY

⭐ Poultry mein Mg deficiency: Gasping, loss of muscle tone, coma, death

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4️⃣ SODIUM (Na) / SALT DEFICIENCY

⭐ Poultry: NaCl deficiency → Cannibalism, feather pecking

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5️⃣ POTASSIUM (K) DEFICIENCY

• Rare (fodder mein usually enough)
• Weakness, muscle paralysis, reduced growth
• Poultry: reduced feed intake, poor growth, high mortality

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🔬 MICROMINERALS / TRACE ELEMENTS

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6️⃣ IRON (Fe) DEFICIENCY

📍 Function

• Hemoglobin formation (oxygen carry karna)
• Myoglobin (muscle mein O2 storage)
• Enzymes (catalase, peroxidase)

Disease: NUTRITIONAL ANEMIA ⭐

⭐ "Piglet + Anemia + Thumps = Iron Deficiency = Fe Dextran injection do"

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7️⃣ COPPER (Cu) DEFICIENCY

📍 Function

• Hemoglobin synthesis (Fe metabolism mein help)
• Myelin formation (nerve coating)
• Bone formation
• Coat/wool pigmentation
• Immune function

Diseases:

⭐⭐ "Copper = Cu = Color (depigmentation) + Cord (myelin/swayback) + Cardiac (falling disease)"

• Anemia (pale birds)
• Poor bone development
• Reduced hatchability

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8️⃣ ZINC (Zn) DEFICIENCY

📍 Function

• Immune system (T-cell function)
• Wound healing
• Reproductive function
• Enzyme activation (100+ enzymes)
• Protein synthesis
• Taste and smell

Disease: PARAKERATOSIS ⭐⭐

⭐⭐ "Zinc = Parakeratosis = Pig ki skin bimaar = Scaly crusty patches"

• Frizzled feathers ⭐
• Poor feather development
• Reduced growth, bone shortening
• Poor hatchability, abnormal embryos

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9️⃣ MANGANESE (Mn) DEFICIENCY

📍 Function

• Bone formation
• Reproduction
• Enzyme activation
• Carbohydrate metabolism

Diseases:

⭐⭐ "Manganese = Mn = Perosis = Murghi ka Tendon Slip ho gaya"

• Enlargement and malformation of tibiometatarsal joint
• Twisting and bending of distal tibia
• Gastrocnemius tendon slips off the condyle ⭐
• Legs cannot support body weight
• High Ca+P diet worsens it (reduces Mn absorption)

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🔟 SELENIUM (Se) DEFICIENCY

📍 Function

• Antioxidant (with Vitamin E)
• Muscle health
• Immune function
• Thyroid hormone metabolism
• Reproduction

Disease: WHITE MUSCLE DISEASE (Nutritional Muscular Dystrophy) ⭐⭐

⭐⭐ "Selenium = Se = Se Muscles Save hote hain = White Muscle Disease when Se absent"

• Exudative Diathesis ⭐⭐ - subcutaneous edema (greenish fluid under skin)
• Nutritional Muscular Dystrophy (gizzard myopathy - "Nutritional Myopathy of Gizzard")
• Pancreatic fibrosis
• Poor immunity

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1️⃣1️⃣ IODINE (I) DEFICIENCY

📍 Function

• Thyroid hormone (T3, T4) synthesis ONLY ⭐
• Growth, metabolism, reproduction
• Fetal development (brain + nervous system)

Disease: GOITER ⭐⭐

⭐⭐ "Iodine = I = I for thyroId = Goiter jab I kam ho"

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1️⃣2️⃣ COBALT (Co) DEFICIENCY

📍 Function

• Vitamin B12 (Cobalamin) synthesis by rumen bacteria ⭐
• (Only ruminants - monogastrics ko direct B12 chahiye)
• Energy metabolism, RBC formation

Disease: PINE / COBALT PINE / ENZOOTIC MARASMUS ⭐⭐

⭐ "Cobalt = Co = Cobalamin = Ruminants only = Sheep Pine away = PINE disease"

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🎯 MASTER MEMORY TABLE - EXAM KA SABSE KAAM WAALA ⭐⭐⭐

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🧠 SUPER MEMORY TRICKS

Trick 1 - "Which Mineral → Which Disease → Which Animal"

Fe   →  Anemia Thumps    →  PIG (piglet)
Cu   →  Swayback Ataxia  →  LAMB
Zn   →  Parakeratosis    →  PIG (pig skin)
Mn   →  Perosis          →  POULTRY (murghi)
Se   →  White Muscle     →  CALF / LAMB
I    →  Goiter           →  ALL (especially newborns)
Co   →  Pine             →  SHEEP

Trick 2 - "3 Bone Diseases" yaad karo

RICKETS     = Young growing animals = Ca + P + Vit D deficiency
OSTEOMALACIA = Adults = Ca + P deficiency (bones soften)
OSTEOPOROSIS = Repeated Ca mobilization = Cage layers

Trick 3 - "Slipped Tendon vs Swayback"

PEROSIS (Slipped Tendon)  = Mn deficiency = POULTRY (leg)
SWAYBACK (Enzootic Ataxia) = Cu deficiency = LAMBS (spinal cord)

Trick 4 - "White diseases"

WHITE MUSCLE disease  = Se + Vit E deficiency
WHITE diarrhea (BWD)  = Salmonella Pullorum

Trick 5 - "Skin diseases from mineral deficiency"

PARAKERATOSIS = Zn deficiency = Pig skin
ACHROMOTRICHIA = Cu deficiency = Coat color loss
EXUDATIVE DIATHESIS = Se deficiency = Poultry skin edema

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🐔 POULTRY-SPECIFIC QUICK TABLE ⭐

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🐄 CATTLE/RUMINANT-SPECIFIC QUICK TABLE ⭐

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🎯 TOP 15 EXAM ONE-LINERS

1. "Pica = P ya Na deficiency = Mitti/haddi khana" ⭐
2. "Grass Tetany = Mg = Spring mein lactating cow mein seizures" ⭐
3. "Milk Fever = Ca = Calving ke 3 din baad cow girr jaaye" ⭐
4. "Piglet anemia = Fe = Fe Dextran 2-3 din pe inject karo" ⭐
5. "Swayback = Cu = Lamb ka spinal cord demyelinate" ⭐
6. "Achromotrichia = Cu = Baal ka color chala gaya" ⭐
7. "Parakeratosis = Zn = Pig ki crusty scaly skin" ⭐
8. "Perosis = Mn = Poultry ka tendon slip" ⭐
9. "White Muscle Disease = Se + Vit E = Muscles mein white streaks" ⭐
10. "Exudative Diathesis = Se = Poultry ki skin ke neeche green fluid" ⭐
11. "Goiter = I = Thyroid gland badi = Neck mein sujan" ⭐
12. "Pine Disease = Co = Cobalt → B12 → Sheep waste away" ⭐
13. "Rickets = Ca/P/Vit D = Young animals = Rubbery bones" ⭐
14. "Cage Layer Fatigue = Ca = Hen paralyzed in cage" ⭐
15. "Frizzled feathers = Zn = Poultry" ⭐

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