Table 1. Definitions of the types of informal-marketed milk sellers seen in Kampala.

1	Milk shop with a bulk cooler	Milk shops storing milk in a bulk cooler which shape is either box or cylinder. There are two types: wholesaler and retailer.
2	Milk shop with a small refrigerator	Milk shops storing milk in a small refrigerator.
3	Milk shop without a refrigerator	Milk shops storing milk in a basin at an ambient temperature.
4	Milk trader with a milk can on a bicycle	There are three types:1) Those who buy milk at peri-urban farms and sell to contracted individual households and passing trade2) Those who buy at milk boiling centres and sell to contracted individual households and passing trade3) Those who buy milk at wholesaler bulk cooler milk shops and sell to contracted individual households and passing trade or smaller milk shops.
5	Roadside milk vendor	Milk vendors selling milk at roadside in the early mornings and the evenings. There are three types:1) Those who buy milk at peri-urban farms and sell milk on the roadside in trading centres2) Those who buy milk at boiling centres and sell milk on the roadside in trading centres3) Those who cook milk tea on the roadside (however this type is excluded from the present study since this milk is boiled and therefore not a risk).