Chapter 34 Rickettsiales and Coxiella burnetii The members of the Rickettsiales are minute, non-motile, pleomorphic, obligate intracellular Gram-negative bacteria. They are rods or coccobacilli, visible under the light microscope and…
Chapter 13 Erysipelothrix species Genus Characteristics The genus Erysipelothrix is now classified as part of the regular non-spore-forming Gram-positive rods group along with Lactobacillus and Listeria. Erysipelothrix species are mesophilic,…
Chapter 65 Retroviridae Retroviruses (Latin retro, backwards) are spherical, labile, enveloped RNA viruses with a diameter of 80 to 100 nm (Fig. 65.1). Two subfamilies comprising seven genera are currently recognized…
Chapter 24 Campylobacter, Arcobacter and Helicobacter species Genus Characteristics The Campylobacter species are members of the family Campylobacteraceae, together with Arcobacter species and Bacteroides ureolyticus. They are thin, curved, Gram-negative…
Chapter 55 Reoviridae The term reovirus is an acronym derived from respiratory, enteric and orphan viruses. Original isolations of these viruses were from respiratory and enteric samples but without associated…
Chapter 28 Bordetella species Genus Characteristics Bordetella species are small (0.2–0.5 µm in diameter and 0.5–2.0 µm in length), Gram-negative rods which tend to be coccobacillary. They belong to the Alcaligenaceae family….
Chapter 23 Brucella species Genus Characteristics Brucella species are small Gram-negative rods (0.5–0.7 × 0.6–1.5 µm) that often appear coccobacillary. The brucellae were previously divided into six species based principally on…
Chapter 29 Moraxella species The genus Moraxella is a member of the family Moraxellaceae. Moraxella catarrhalis and Branhamella catarrhalis are homotypic synonyms and it has been suggested that the genus…
Chapter 37 Introduction to the pathogenic fungi General characteristics of the fungi Fungi have a eucaryotic cell type and are therefore insensitive to most bacterial antibiotics. They have nuclei with…
Chapter 30 Glucose non-fermenting, Gram-negative bacteria The glucose non-fermenting, Gram-negative bacteria use glucose oxidatively or not at all. The genera Pseudomonas, Bordetella and Moraxella, which include significant veterinary pathogens, belong…
