Which set of pathogens are listed as being of particular risk to people exposed to birthing animals or birthing exhibits?

• A. Coxiella burnetii; Brucella spp; Leptospira spp; Listeria monocytogenes
• B. Streptococcus pyogenes
• C. Mycobacterium tuberculosis
• D. Campylobacter jejuni

Answer: (A)

Exposure to animals during birth presents a special risk for pathogens that spread through birth fluids, placental tissue, or contaminated environments. The best choice includes organisms that are well known to be shed or concentrated in reproductive materials from infected animals and can cause human disease after inhalation or contact with birth products. Coxiella burnetii (Q fever) is notorious for causing illness after inhaling dust contaminated with placental and birth fluids from infected ruminants, making birthing settings particularly high risk. Brucella species are classic reproductive pathogens shed in placentas, fetal tissues, and secretions; human brucellosis follows direct contact with birth materials or consumption of unpasteurized dairy from affected animals. Leptospira species can contaminate environments through urine from infected animals, a route that becomes relevant in animal facilities where contact with birth environments or water sources occurs. Listeria monocytogenes is associated with birth tissues and animal products and poses a notable risk to pregnant individuals due to potential fetal infection, with the organism capable of surviving in moist environments found around births and in certain foods as well.

Other options don’t fit this specific exposure pattern as closely. Streptococcus pyogenes is more typically linked to skin and throat infections rather than birthing-associated exposures. Mycobacterium tuberculosis spreads primarily through human-to-human respiratory transmission, not through birthing animal materials. Campylobacter jejuni is a common foodborne pathogen linked to animal sources but not specifically tied to birthing fluids or tissues in occupational exposure contexts.