Equine trypanosomosis in the Central River Division of The Gambia: a study of veterinary gate-clinic consultation records.

The research study focuses on examining the prevalence and characteristics of equine trypanosomosis, a parasitic disease, in the Central River Division of The Gambia. The researchers used veterinary consultation records from a local clinic to track the occurrence and characteristics of the disease in both horses and donkeys.

Research Methodology

• The primary data source was the gate-clinic consultation records from Sololo in the Central River Division of The Gambia.
• The researchers retrospectively analyzed 2285 consultation records spanning from September 1995 to July 2002. These records included consultations for 2113 horses and 172 donkeys.

Key Findings

• The most frequently diagnosed condition among the equines was ‘Trypanosome infection’, contributing to 61% of the cases.
• Horses were more likely than donkeys to be diagnosed with trypanosome infections. The occurrence rate was 63% in horses compared to 43% in donkeys.
• The primary cause of trypanosome infections in both species of equines was Trypanosoma congolense (64%) and Trypanosoma vivax (32%).
• There was no significant difference in infection rates between male and female donkeys, but female horses had a slightly higher infection rate than male horses.
• Older horses were more frequently diagnosed with trypanosome infections than young horses, while there was no significant age-related difference in the occurrence of trypanosome infections among donkeys.
• There was a seasonal correlation with the number of cases dropping during the rainy season (June-September).
• The majority of equines diagnosed with trypanosome infections exhibited severe anaemia.
• Packed Cell Volume (PCV), a measure of anaemia, was inversely proportional to the parasitaemia level, indicating that the severity of infection corresponded to the degree of anaemia.

Additional Observations

• Based on the study, farmers had a fairly accurate knowledge of the diseases affecting their equines, with 74% of their predictions about trypanosome infections confirmed by microscopy.
• The treatment methods employed at the gate-clinic were generally effective. There was a low relapse rate of 0.4% for Trypanosoma vivax infections, which was insufficient to demonstrate drug resistance.

Conclusion

• This study demonstrated that the analysis of gate-clinic records can yield valuable supplementary information for epidemiological research and can serve as a useful tool in tracking and understanding the prevalence and characteristics of diseases like equine trypanosomosis.