Question

1. The Gram reaction; Gram Positive or Gram Negative 2. The shape of the cells; bacillus, coccus, spiral 3. The typical arrangement of the cells; single, pairs, clusters, chains etc. Shape of cells Arrangement of cells Name of organism Gram Reaction Bacillus cereus Enterobacter aerogenes Enterococcus durans Escherichia coli Micrococcus luteus Senatra marcescens Staphylococcus epidermidis streptococcus Salivarius Klebsiella pmeumonia Salmonella entertidis Shigella Sonnei Staphylococcus aureus Streptococcus pyogenes *Hint: The organisms used in the Lab. are listed in the Safety Guidelines section of your Lab. Notebook.

Answer 1

Name of organism	Gram reaction	shape of cells	arrangement of cells
Bacillus cereus	Gram positive	Bacillus	Single
Enterobacter aerogenes	Gram negative	Bacillus	Single or Chains
Enterococcus durans	Gram positive	Coccus	Pairs or Chains
Escherichia coli	Gram negative	Bacillus	Single
Micrococcus luteus	Gram positive	Coccus	Clusters
Serratia marcescens	Gram negative	Bacillus	Single
Staphylococcus epidermidis	Gram positive	Coccus	Clusters
Streptococcus salivarius	Gram positive	Coccus	Chains
Klebsiella pneumonia	Gram negative	Bacillus	Single or Pairs
Salmonella enteritidis	Gram negative	Bacillus	Single or Pairs
Shigella sonnei	Gram negative	Bacillus	Single or Pairs
Staphylococcus aureus	Gram positive	Coccus	Clusters
Streptococcus pyogenes	Gram positive	Coccus	Chains