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Research Article
Online Published: 26 Sep 2025


Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming

Ngueguim Dérrick Fabrice, Boufack Judith Laure, Fonou Tadiesse Lavoisier, Tchowan Guy Merlin, Tene Fotsing Landry, Takam Mbogne Boris, Awa Ndukum Julius, Kenfack Augustave.


Abstract
Objective: African giant rats (AGRs) host several zoonotic parasites, including Ascaris sp. The biological control of parasites in domestic animals includes the use of light manipulation. This study aimed to show whether light exposure affects growth parameters and susceptibility of male AGRs to Ascaris sp.
Material and Methods: Twenty male AGRs weighing 945 ± 171 gm were randomly assigned to four light schedules (light/dark; 0L:24D; 12L:12D; 18L:6D; 24L:0D). Dewormed, they were housed individually and had permanent access to food and water throughout the experiment (56 days). Weekly growth parameters (feed intake, daily weight gain, and live body weight) were collected, while Ascaris sp. eggs were analyzed biweekly in the fecal matter.
Results: Findings revealed that male AGRs' growth parameters were not significant (p > 0.05) among treatments. However, reduced photoperiod showed an upward trend, with the highest values recorded in animals enlightened 12 h per day. Two weeks after deworming, animals exposed to extended photoperiods had considerably (p < 0.05) more Ascaris sp. eggs than other animals. Meanwhile, Ascaris sp. egg abundance has gradually declined and, at the end of the trial, reached zero in certain treatments (0L:24D; 12L:12D; 18L:6D).
Conclusion: Light exposure does not affect growth performances, but AGRs reared under extended photoperiod are more susceptible to re-infection by Ascaris sp. after efficient deworming. The ideal light schedule for AGR husbandry is the natural photoperiod (12L:12D).

Key words: Cricetomys gambianus; growth parameters; parasite; photoperiod; Ascaris sp.


 
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How to Cite this Article
Pubmed Style

Fabrice ND, Laure BJ, Lavoisier FT, Merlin TG, Landry TF, Boris TM, Julius AN, Augustave K. Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming. Vet. Res. Notes. 2025; 5(9): 88-93. doi:10.5455/vrn.2025.e61

Web Style

Fabrice ND, Laure BJ, Lavoisier FT, Merlin TG, Landry TF, Boris TM, Julius AN, Augustave K. Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming. https://www.vetresnotes.com/?mno=248388 [Access: October 31, 2025]. doi:10.5455/vrn.2025.e61

AMA (American Medical Association) Style

Fabrice ND, Laure BJ, Lavoisier FT, Merlin TG, Landry TF, Boris TM, Julius AN, Augustave K. Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming. Vet. Res. Notes. 2025; 5(9): 88-93. doi:10.5455/vrn.2025.e61


Vancouver/ICMJE Style

Fabrice ND, Laure BJ, Lavoisier FT, Merlin TG, Landry TF, Boris TM, Julius AN, Augustave K. Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming. Vet. Res. Notes. (2025), [cited October 31, 2025]; 5(9): 88-93. doi:10.5455/vrn.2025.e61


Harvard Style

Fabrice, N. D., Laure, . B. J., Lavoisier, . F. T., Merlin, . T. G., Landry, . T. F., Boris, . T. M., Julius, . A. N. & Augustave, . K. (2025) Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming. Vet. Res. Notes, 5 (9), 88-93. doi:10.5455/vrn.2025.e61


Turabian Style

Fabrice, Ngueguim Dérrick, Boufack Judith Laure, Fonou Tadiesse Lavoisier, Tchowan Guy Merlin, Tene Fotsing Landry, Takam Mbogne Boris, Awa Ndukum Julius, and Kenfack Augustave. 2025. Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming. Veterinary Research Notes, 5 (9), 88-93. doi:10.5455/vrn.2025.e61


Chicago Style

Fabrice, Ngueguim Dérrick, Boufack Judith Laure, Fonou Tadiesse Lavoisier, Tchowan Guy Merlin, Tene Fotsing Landry, Takam Mbogne Boris, Awa Ndukum Julius, and Kenfack Augustave. "Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming." Veterinary Research Notes 5 (2025), 88-93. doi:10.5455/vrn.2025.e61


MLA (The Modern Language Association) Style

Fabrice, Ngueguim Dérrick, Boufack Judith Laure, Fonou Tadiesse Lavoisier, Tchowan Guy Merlin, Tene Fotsing Landry, Takam Mbogne Boris, Awa Ndukum Julius, and Kenfack Augustave. "Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming." Veterinary Research Notes 5.9 (2025), 88-93. Print. doi:10.5455/vrn.2025.e61


APA (American Psychological Association) Style

Fabrice, N. D., Laure, . B. J., Lavoisier, . F. T., Merlin, . T. G., Landry, . T. F., Boris, . T. M., Julius, . A. N. & Augustave, . K. (2025) Light exposure affects growth parameters and susceptibility of African Giant Rats (Cricetomys gambianus) to re-infection by Ascaris sp. after efficient deworming. Veterinary Research Notes, 5 (9), 88-93. doi:10.5455/vrn.2025.e61




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    Network for the Veterinarians of Bangladesh (BDvetNET), Prof. Nazmul H. Nazir, DVM, MS, PhD, Dept. of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, BANGLADESH. E-mail: bdvetnet@gmail.com or nazir@bau.edu.bd
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