Which of these is a valid concern for large animal veterinarians when it comes to sterility, cleanliness, and pathogen control?

Large animal veterinarians may need to perform procedures in barns, fields, or other places where animals live, rather than in a controlled operating room. These environments may be difficult to keep clean, making sterility and pathogen control a valid concern. Pathogens are not specifically attracted to horses, and the concern is not that veterinary schools fail to teach the subject.

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