BIOL 441 -Midterm Make up

Staphylococcal food poisoning is caused by

• Haemotoxin

• Exotoxin

• Enterotoxin

• Halophiles

Hemolysins are enzymes produced by some bacteria which breakdown

• Blood cells

• Haemoglobin

• Myoglobin

• None of the above

Which disease is not caused by staphylococcus species

• septic arthritis

• Cellulitis

• endocarditis

• osteomyelitis

S. aureus is frequently introduced into food from

• Nasal cavity

• abscesses

• Skin

• All of the above

To collect sample from skin we use buffer with

• SDS

• Triton X

• NaCl

• NaOH

In identification of staph, stab agar many times to find out oxygen-sensitive

• Hemolysin

• Halophilic

• Novobiocin

• Anaerobes

Phenol red indicates the acidic condition with,

• Red color

• Yellow color

• Pink color

• Orange color

Hyaluronic acid is a

• Acidic mucopolysaccharides

• Basic mucopolysaccharides

• Acidic mucosaccharides

• Basic mucosaccharides

Cell-free coagulase form clumps by reacting with

• Albumin plasma factor.

• Globulin serum factor.

• Albumin plasma factor.

• Globulin plasma factor.

Lactam ring present in,

• Antibodies

• Lactoferin

• Antimicrobial drugs

• Lactamase