Chapter 26 Ehrlichia and Anaplasma Infections Rickettsiae that cause ehrlichiosis and anaplasmosis are classified as bacteria within the group α-proteobacteria. They are intermediate between viruses, which are obligate intracellular organisms,…
Chapter 38 Canine Brucellosis Craig E. Greene and Leland E. Carmichael Etiology and Epidemiology Brucella canis is a small (1.0 to 1.5 µm), gram-negative, aerobic, coccobacillary organism. Its rough colonial morphology,…
Chapter 59 Cryptococcosis Jane E. Sykes and Richard Malik Etiology Cryptococcosis is an important fungal infection of humans and animals and the most common systemic mycosis of cats. The infection…
Chapter 91 Bacterial Infections of the Central Nervous System Marc Kent References Images Web Tables, Boxes, and Appendices Etiology Central nervous system (CNS) inflammation is described as encephalitis, myelitis, and meningitis based…
Chapter 93 Environmental Factors in Infectious Disease Craig E. Greene, J. Scott Weese and Janet P. Calpin Means of Transmission The reservoir of an infectious disease is the natural habitat…
Chapter 57 Blastomycosis Alfred M. Legendre Etiology Blastomycosis, as discussed in this chapter, is a systemic mycotic infection caused by the dimorphic fungus Blastomyces dermatitidis. This should not be confused…
Chapter 72 Trypanosomiasis Trypanosomes, which cause trypanosomiasis, are hemoflagellate protozoans of the class Zoomastigophorea and family Trypanosomatidae. The disease has been arbitrarily divided into American and African forms of disease,…
Chapter 86 Cardiovascular Infections Clay A. Calvert and Justin D. Thomason Bacteremia Bacteremia indicates the presence of bacteria in the blood, and although a presumptive diagnosis can be offered on…
Chapter 81 Cryptosporidiosis and Cyclosporiasis Valeria Scorza and Michael R. Lappin Cryptosporidiosis Etiology and Epidemiology Cryptosporidium is a ubiquitous coccidian genus in the phylum Apicomplexa, class Conoidasida, suborder Eimeria, family…
Chapter 66 Pneumocystosis Remo Lobetti Etiology Pneumocystis carinii, the etiologic agent of pneumocystosis, occurs worldwide and infects virtually all mammalian species, including humans. Pneumocystis is a saprophyte of low virulence…
