Escherichia coli: Avian Pathogenic E. coli

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What is the primary route of infection for APEC in poultry?

Ingestion of contaminated feed

Direct contact with infected birds

Vertical transmission from parent to chick

Inhalation of feces-contaminated dust (correct)

Which of the following is a common risk factor for APEC infection in poultry?

Exposure to ammonia and dust in the environment (correct)

Viral infection after vaccination

Poor ventilation in the poultry house

Lack of access to clean water

What is the typical age range for chicks affected by neonatal colibacillosis?

1-4 weeks old

1 week old (correct)

4-6 weeks old

1-2 weeks old

What is the term for the severe presentation of neonatal colibacillosis, characterized by a dirty and wet appearance?

Mushy chick Signup and view all the answers

What is the estimated mortality rate for respiratory colibacillosis in poultry?

Up to 20% Signup and view all the answers

What is the term for the inflammatory response in the liver and heart in respiratory colibacillosis?

Both b and a Signup and view all the answers

What is the typical age range of chickens when they are diagnosed with egg yolk peritonitis?

21-80 weeks Signup and view all the answers

What is the serotype of E. coli commonly associated with egg yolk peritonitis?

O166 Signup and view all the answers

What is the characteristic lesion found in chickens with swollen head syndrome?

Gelatinous edema Signup and view all the answers

What is the primary causative agent of scabby hip/necrotic dermatitis in poultry?

APEC Signup and view all the answers

What is the outcome of swollen head syndrome in poultry?

Low mortality Signup and view all the answers

What is the sequence of events leading to swollen head syndrome in poultry?

Pneumovirus infection followed by APEC invasion Signup and view all the answers

What is the characteristic of Coligranuloma disease in old birds?

Chronic condition with multiple granulomas in liver, cecum, duodenum, and mesentery Signup and view all the answers

What is the purpose of using XLD agar in culturing Escherichia coli?

To detect H2S production Signup and view all the answers

What is the significance of serotyping methods in Escherichia coli diagnosis?

To identify the strain of E. coli Signup and view all the answers

What is the characteristic of Salmonella reservoir?

Intestinal tract of warm-blooded and cold-blooded animals Signup and view all the answers

What is the clinical presentation of Salmonella infection in animals?

Systemic septicemia, enteritis, abortion, and meningitis Signup and view all the answers

What is the purpose of enzyme-linked immunosorbent assays (ELISA) in Escherichia coli diagnosis?

To detect the presence of E. coli antibodies Signup and view all the answers

Which Salmonella serovar primarily infects humans, causing severe systemic infections?

S. Typhi Signup and view all the answers

What is the primary site of bacterial multiplication in Salmonella infections?

Macrophage monocyte lineage Signup and view all the answers

Which of the following is NOT a virulence factor in Salmonella enterica subsp. enterica?

Type IV secretion systems Signup and view all the answers

Which serovar of Salmonella is associated with poultry?

S. Gallinarum Signup and view all the answers

What is the primary means of transmission for Salmonella infections?

Fecal-oral route and inhalation Signup and view all the answers

Which of the following is a characteristic of non-systemic serovars of Salmonella?

Colonize the GI tract of healthy animals Signup and view all the answers

What is the percentage of Salmonella enterica subsp.enterica that corresponds to subsp.enterica?

60% Signup and view all the answers

Which of the following is NOT a component of Salmonella enterica subsp.enterica?

Cell wall Signup and view all the answers

What is the approximate percentage of Salmonella enterica subsp.enterica that produces disease primarily in one host species?

95% Signup and view all the answers

What is the name of the classification system used for Salmonella enterica subsp.enterica?

Kauffmann and White classification Signup and view all the answers

Approximately what percentage of Salmonella enterica subsp.enterica is associated mainly with one host species?

99% Signup and view all the answers

Which of the following Salmonella serotypes is associated with typhoid fever in humans?

S.Typhi Signup and view all the answers