Module Three: Gram Positive Rods and Filaments

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Module Three Gram Positive Rods and Filaments Lesson one a Corynebacterium and Eubacterium

Lesson one b Eubacterium

Lesson one c Rhodococcus

Lesson two The Actinomycetes

Lesson three a Listeria

Lesson three c Bacillus

GENUS CORYNEBACTERIUM

Key Points:

Changes in Nomenclature

Previous Name

Species:

Differentiation of the Corynebacteria

Differentiation of bacteria in the Corynebacteria renale group

Diagnostic Procedures

Identification criteria for isolates:

Clinical Infections

C. renale group: C. renale, C. pilosum, and C. cystitidis

Morphology and Staining Reactions

Cultural and Biochemical Properties

Epizootiology and Pathogenesis

· Distinctive Features of the organisms

Diagnosis

Antimicrobial Susceptibility

LESSON one b

Morphology and Staining Reactions

Cultural and Biochemical Features

Epizootiology and Pathogenesis

Diagnosis

Treatment

LESSON one c

Key points

Epizootiology and Pathogenesis

Diagnosis

Clinical conditions associated with Rhodococcus.

LESSON TWO

Key points

Differentiation of the Genera

Comparative features of actinomycetes of veterinary importance

ACTINOMYCES, ARCANOBACTERIUM AND ACTIBACULUM SPECIES

Diagnostic Procedures

· Identification criteria for isolates:

Antimicrobial susceptibility

Disease conditions produced by Actinomyces, Arcanobacterium and Actinobaculum species in domestic animals

Differentiation of Nocardia species

Differentiation of Nocardia asteroids and Actinomyces viscosus

Diagnostic Procedures

Identification criteria for isolates:

Treatment

Disease conditions produced by Nocardia species in domestic animals

Pathogenesis and Pathogenicity

Lumpy wool

Streptotrichosis

Strawberry foot-rot in sheep

Diagnostic Procedures

· Identification criteria:

Treatment

Review Questions:

LESSON Three a GENUS LISTERIA

Key points

Differentiation of Listeria species

Laboratory methods for differentiating Listeria species

Treatment

Clinical manifestations of infections with Listeria species in domestic animals

GENUS ERYSIPELOTHRIX

E. rhusiopathiae

Key points

Definitive identification of E. rhusiopathiae

Biochemical reactions

Serotyping.

Pathogenesis and Pathogenicity

Diagnosis

Main hosts and diseases of Erysipelothrix rhusiopathiae

GENUS BACILLUS

Bacillus anthracis is the most important pathogen in the group.

Species:

Sporangium (mother cell)

Differentiating features of Bacillus anthracis and Bacillus cereus

Bacillus anthracis causes anthrax

Morphology and Staining Reactions

Cultural and Biochemical Features

Resistance

Epizootiology and Pathogenesis

Diagnosis

Treatment

Disposal of Carcasses Infected with Anthrax

Review Questions:

Overview

The document discusses various genera of Gram-positive rods and filaments, highlighting their identification, pathogenicity, and clinical implications in animals. It emphasizes the importance of these bacteria in both health and disease, providing diagnostic criteria and treatment options where applicable.

Key Points

1Corynebacterium species exhibit diverse morphological forms including club and rod shapes
2Eubacterium species can cause cystitis and pyelonephritis in livestock
3Rhodococcus is an opportunistic pathogen primarily affecting foals
4The document outlines diagnostic procedures including culture media and biochemical tests
5Key pathogenic mechanisms are provided for better understanding of infections in animals

Details

Category: Biology and Natural Sciences

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