A system for on-site determination of a parasitic infection characteristic of a non-human mammal, comprising: a portable faecal sample preparation device configured for use on-site to receive faecal matter from the mammal and a faecal flotation fluid, mix the faecal matter and faecal flotation fluid to provide a suspension, and filter the suspension to provide a filtrate, in which the filtrate is the faecal sample; a translucent faecal sample support; a portable digital imaging module adapted to generate a digital image of a faecal sample or the sample support and communicate the digital image via a wireless communications network by detachable engagement with a mobile communications device in a sample support imaging position, in which the digital image of the faecal sample on the sample support is generated by a camera of the mobile communications device and communicated to the off-site digital image analysis module via the mobile communications device, an off-site digital image analysis module configured to receive the digital image of the faecal sample via the wireless communication network, analyse the digital image to determine a parasitic infection characteristic of the sample, and communicate the parasitic infection characteristic of the sample via a wireless communications network; and downloadable software for a mobile communications device configured to cause the mobile communications device to: receive the digital image of the faecal sample; communicate the digital image to the off-site digital image analysis module; receive the parasitic infection characteristic of the sample from the off-site digital image analysis module; and display the parasitic infection characteristic of the sample on the screen of the mobile communications device, in which the software for the mobile communications device is configured to cause the mobile communications device to: request input of identification data for the mammal into the mobile communications device; receive and store identification data for the mammal; display on the screen of the mobile communications device the parasitic infection characteristic of the sample and the mammal identification data, and in which the software for the mobile communications device is configured to cause the mobile communications device to store a plurality of parasitic infection characteristics for the same mammal obtained over a period of time, and display the plurality of parasitic infection characteristics on the mobile communications device. a portable faecal sample preparation device configured for use on-site to receive faecal matter from the mammal and a faecal flotation fluid, mix the faecal matter and faecal flotation fluid to provide a suspension, and filter the suspension to provide a filtrate, in which the filtrate is the faecal sample; a translucent faecal sample support; a portable digital imaging module adapted to generate a digital image of a faecal sample or the sample support and communicate the digital image via a wireless communications network by detachable engagement with a mobile communications device in a sample support imaging position, in which the digital image of the faecal sample on the sample support is generated by a camera of the mobile communications device and communicated to the off-site digital image analysis module via the mobile communications device, an off-site digital image analysis module configured to receive the digital image of the faecal sample via the wireless communication network, analyse the digital image to determine a parasitic infection characteristic of the sample, and communicate the parasitic infection characteristic of the sample via a wireless communications network; and downloadable software for a mobile communications device configured to cause the mobile communications device to: receive the digital image of the faecal sample; communicate the digital image to the off-site digital image analysis module; receive the parasitic infection characteristic of the sample from the off-site digital image analysis module; and display the parasitic infection characteristic of the sample on the screen of the mobile communications device, receive the digital image of the faecal sample; communicate the digital image to the off-site digital image analysis module; receive the parasitic infection characteristic of the sample from the off-site digital image analysis module; and display the parasitic infection characteristic of the sample on the screen of the mobile communications device, in which the software for the mobile communications device is configured to cause the mobile communications device to: request input of identification data for the mammal into the mobile communications device; receive and store identification data for the mammal; display on the screen of the mobile communications device the parasitic infection characteristic of the sample and the mammal identification data, request input of identification data for the mammal into the mobile communications device; receive and store identification data for the mammal; display on the screen of the mobile communications device the parasitic infection characteristic of the sample and the mammal identification data, and in which the software for the mobile communications device is configured to cause the mobile communications device to store a plurality of parasitic infection characteristics for the same mammal obtained over a period of time, and display the plurality of parasitic infection characteristics on the mobile communications device.