Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Investigation and analysis on the prevalence of virus and worm infections in the giant panda nature reserve - taking Liziping nature reserve as an example.

Abstract

In order to understand the prevalence of viral diseases and worm diseases which may infect giant pandas in the areas around the giant panda nature reserve, this study investigated the activities and sizes of 368 domesticated dogs in the surrounding areas of the Liziping nature reserve by means of field visits and weighing measurements. According to the survey results, 63.9% of dogs were range-free, 36.1% were restricted, 24.5% were unltr-small dogs, 29.6% were small dogs, 42.2% were medium dogs, and 3.7% were large dogs. 172 blood sample from domesticated dogs in this area around were collected between December 2016 to December 2017. Antibodies of canine distemper virus (CDV), canine parvovirus (CPV), rabies virus (RV), and canine rotavirus (CRV) were checked by ELISA experiment. The results showed that CDV, CPV and CRV have higher positive rates in spring, autumn and winter, and are mostly found in puppies under 1 year old. Meanwhile, the positive rate of RV has no significant seasonal and age difference. The positive rates of CDV, CPV, RV and CRV were 4.7%, 3.5%, 12.8% and 3.5%, respectively. The mixed infection rates were 9.1% for RV with CDV, 9.1% for RV with CPV, 4.5% for RV with CRV, and 6.8% for CDV with CRV. At the same time, we collected 66 dog fecal samples and examined the worm egg by saturated sodium chloride flotation method. The results showed that 7 species of parasites were detected in the fecal samples. The infection ratio of Toxocara canis, Ancylostomacanium, Trichuris vulpis, Dipylidium caninum, Strongyloides, Baylisascaris transfuga and Toxascaris leonine was 45.4%, 21%, 12%, 12%, 9.1%, 6.1% and 3%, respectively. The average intensity of helminth infections is below 50 eggs per 10 grams of feces. The investigation results showed that most of the domesticated dogs in this area had strong activity ability and were in free-range. Some of the dogs carried 4 viruses (mainly rabies) and most of them were mixed infected with RV/CDV or RV/CPV. Some of the dogs were infected with 7 kinds of worms (mainly Toxocara canis). This study provided epidemiological data for the prevention and control of viral and worm diseases of giant pandas in Liziping nature reserve.