We investigated the additional queried potential indoor home environmental risk factors of pesticide use in the past year, reported cockroach problem, reported mouse problem, pet dog, pet cat, air conditioning, and a gas stove with a continuously burning pilot light for only their current residence.
Problems with cockroaches were reported by caregivers in 40% of the homes, but visual signs of cockroaches were seen in only 16%.
Cockroaches were reported in 58% of homes, wall-to-wall carpeting in the child's bedroom in 55%, a smoker in 48%, mice or rats in 40%, and furry pets in 28%.
More than 50% of the sample had two or more types of housing dilapidation, and 67% of the sample reported cockroach sightings in their homes.
Ultrastructural studies of the SI neuron, both in moth and cockroach, have been reported to mainly express output synapses in the antennal lobe a finding that indicates the presence of a centrifugal neuron influencing the olfactory information at the glomerular level, possibly through signals received at the protocerebral level (Salecker and Distler 1990; Sun et al. 1993).
54 One study reported increasing cockroach allergen exposure in infancy was positively associated with wheeze by age 5 years (OR 1.8) and, independently, the presence of a dog and higher concentrations of cat allergen exposure were associated with reduced wheeze risk (OR 0.3 and 0.6).
The SCMP reports that cockroach farms like Li's are not unfamiliar in China, because Periplaneta americana are used in a number of Chinese medicine and health products.
These characteristics are similar to those in cockroach neurons as previously reported (32, 33).
Rosenstreich et al. (1997), for example, reported a cockroach sensitization rate of 36% in inner-city asthmatic children.
Other models of neonatal sensitization and challenge, using clinically relevant allergens such as house dust mite or cockroach allergen, have been reported (Kulhankova et al., 2009; Saglani et al., 2009).
