Zoonosis Flashcards
Which disease is transmitted through direct contact with products of conception?
Brucellosis
Which is disease is transmitted through direct contact with infected bone meal or hide?
Anthrax
Which disease is transmitted through direct contact with fish handler?
Erysipeloid
Which disease is transmitted through direct contact with Abbatoir worker?
Q fever
Which disease is transmitted through inhalation of dropping?
Psittacosis
Which disease is transmitted through inhalation of spores in wool?
Pulmonary anthrax
Which disease is transmitted through inhalation of secretions?
Brucellosis
Which disease is transmitted through ingestion of food and milk products? (5)
Salmonella, Campylobacter, Brucella, Q FEVER, Toxoplasma
Which disease is transmitted through saliva of bites or licks from infected animals?
Rabies, Pasteurella multocida
Which disease is transmitted through faeces?
Salmonellosis, Hyatid disease, Tetanus
Which disease is transmitted through Urine?
Leptospirosis
Which disease is transmitted through blood or life tissues? E.g. animal house attendants, zoo and lab workers: direct handling or inhaling aersols from infected body or tissue of monkeys
Marburg virus disease, Yellow fever
Brucellosis Clinical Features (7)
Fever Arthritis Splenomegaly Hepatomegaly Orchitis CNS (Meningitis). ———->> FASHOCE Endocarditis
Brucellosis Treatment (2)
Rifampicin and Doxycycline
Anthrax Organism Characteristics (4)
Bacillus anthacis
Gram positive Bacilli
Spore-former (spores survive for years)
Disease of Cattle, Sheep
How is Anthrax acquired?
OCCUPATIONAL disease ———> workers handling contaminated hides, hair, wool of sheep, bone meal
Anthrax pathogenesis (2)
1- CAPSULE
- POLYPEPTIDE —-> D-GLUTAMIC ACID
(inhibits opsonization, phagocytosis)
2- PLASMID ENCODED TOXIN (Binary Toxin)
- Protective Factor —> Bind to receptor on macrophage - Lethal Factor —> Inhibit cell function - Oedema Factor —> Increase vascular permeability —> Shock
Cutaneous Anthrax
- Malignant pustule*
- Due to direct inoculation of skin from infected animal or it’s product
Acquired:
1- Industrial: Leather workers, Bone meal factories
2- Non-industrial: Those that work with animals
Pulmonary Anthrax
WOOL-SORTERS DISEASE
Inhaling spores in worker’s handle contaminated wool
Fever, Respiratory distress, Death
High Mortality rate
Gastrointestinal Anthrax
Ingestion of spores
Lethal
Anthrax Treatment and Prevention
Treatment - Penicillin
Prevention - Vaccinate workers at risk
Plague Animal Reservoir
Rat fleas suck blood of rodents e.g. rats —>bites human
Bubonic Plague
Painful enlargement of inguinal lymph nodes
High mortality rate —> HAEMORRHAGIC SEPSIS
Pneumonic Plague
Inhalation of infected respiratory secretions —> Fatal
Spread from one person to another
Septicaemic Plague
Primary or complication of pneumonic or bubonic plague
Plague Pathogenesis (2)
1- Capsule
2- Somatic Antigen (V and W): Resist Phagocytosis
Plague Treatment
Tetracycline
Pasteurella Infection Organism
Pasteurella multocida
Gram-Negative Bacilli
Pasteurella Reservoir
Upper respiratory tract of dogs, cats
Pasteurella Transmission
Bites or scratch from Animal bite
Pasteurella Infections (2)
Wound infection
Septicemia
Pasteurella Treatment
Penicillin
Erysipeloid Organism
Erysipelothrix rhusiopathiae
Gram-Positive bacilli
Erysipeloid Reservoir (4)
Fish - Birds - Swine - Pigs
How does Erysipeloid wound infection occur?
Handling meat or fish especially if skin abrasion
Where do Leptospira (Spirochetes) survive?
In stagnant water and wet soil for long time especially if HIGH PH
Leptospirosis Animal Reservoir (2)
Small wild animals —> Rodents
Domestic animals —> Pigs, cattle, puppies
What do Leptospira penetrate?
Abraded and Intact skin, Conjuntiva, Mucous membrane —> Blood —> Kidneys —> CNS
Leptospirosis Transmission
Direct or Indirect contact with Animal Urine
How is Leptospirosis infection acquired? (2)
1- Wet occupation e.g. sugar cane field, rice field, farms, sewage workers
2- Lesuire activities e.g. swimming pools, play with infected pet
Leptospira canicola
CANICOLA FEVER
Aseptic meningitis- Dogs, Pigs
Leptospira icterohaemorrhagia
WEILS’S DISEASE
Fever, Jaundice, Proteinuria, Subconjunctivital haemorrhage, Hepatic + Renal failure
Rats
Leptospira hebdomadis
Cattle
Leptospirosis Treatment
Penicillin
Which disease causes Meningo-encephalitis?
Listeriosis
Listerosis Treatment
Ampicillin
Listeria Important Charcteristics (3)
1- B-haemolytic
2- Motile at room temp. but NOT 37degrees
3- Catalase positive
What does Bovine tuberculosis cause? (2)
1- Cervical adenitis
2- Mesenteric adenitis
Q fever caused by which organism?
Coxiella burnetti
Q fever Animal reservoir (2)
Sheep
Cattle
Q fever infections (4)
Flu-like illness
Pneumonia
Infective endocarditis
Hepatosplenomegaly
Q fever Treatment
Tetracycline