NACA Animal Control Officers Practice Test

The cardiovascular system is not classified among the major classes of infectious diseases. Major classes of infectious diseases typically include categories that directly relate to common areas where infections occur and are transmitted, such as respiratory, skin, and gastrointestinal systems.

Respiratory infections involve diseases like influenza and pneumonia, which are primarily caused by viruses and bacteria affecting the respiratory tract. Skin infections include various conditions that are caused by pathogens affecting the skin, such as dermatitis, cellulitis, and bacterial or fungal infections. Gastrointestinal infections refer to diseases caused by microorganisms that affect the digestive tract, including viruses like norovirus and bacteria like Salmonella.

While cardiovascular illnesses can result from infections, they are generally referred to in the context of non-infectious diseases or conditions related to heart health, rather than being classified as major classes of infectious diseases. Thus, the cardiovascular category stands apart as it does not fit within the common infectious disease classifications recognized by health authorities.