Factors affecting the prevalence of endoparasites in pre-weaning calves in a warm humid climate of Mexico

Prevalence of trematodes (Fasciola hepatica and paramphistomids) in cattle in southeastern Mexico in the samplings carried out during 2022 and 2023.

Farm and sampling date		Physiological stage	*Fasciola hepatica*	Paramphistomids
Farm 1 DNA	May-22	Lactating cows	25.8 % (8/31)	22.6 % (7/31)
Salto de Agua, Chiapas	June-22	Lactating cows	50.0 % (13/26)	15.4 % (4/26)
	August-22	Lactating cows	0.0 % (0/39)	41.0 % (16/39)
Farm 2 DRG	May-22	Calves	0.0 % (0/17)	70.6 % (12/17)
Salto de Agua Chiapas	June-22	Calves	0.0 % (0/17)	0.0 % (0/17)
	August-22	Lactating cows	20.0 % (7/35)	48.6 % (17/35)
	September-22	Lactating cows	0.0 % (0/11)	0.0 % (0/11)
Farm 4 DNT	August-23	Calves	4.2 % (1/24)	0.0 % (0/24)
Salto de Agua, Chiapas	September-23	Calves	4.0 % (2/50)	0.0 % (0/50)
	October-23	Calves	9.8 % (4/41)	7.3 % (3/41)
	November-23	Calves	0.0 % (0/25)	4.0 % (1/25)
	December-23	Calves	4.2 % (1/24)	0.0 % (0/24)
Farm 5 Rita	July-23	Lactating cows	28.6 % (4/14)	28.6 % (4/14)
Farm 6 Frank	August-23	Lactating cows	3.4 % (1/29)	0.0 % (0/29)
Farm 7 JSalv	September-23	Lactating cows	0.0 % (0/51)	2.0 % (1/51)
Farm 8 PNR2	October-23	Lactating cows	10.3 % (7/68)	13.2 % (9/68)
Farm 9 RNat	November-23	Lactating cows	40.6 % (13/32)	56.3 % (18/32)
Farm 10 RNat2	November-23	Lactating cows	26.7 % (12/45)	35.6 % (16/45)
Farm 11 R1CM	November-23	Lactating cows	10.0 % (3/30)	33.3 % (10/30)
Farm 12 R2CM	November-23	Lactating cows	3.2 % (1/31)	41.9 % (13/31)
Total			12 % (77/640)	20.5 % (131/640)

[i] Farms 5–10. Pueblo Nuevo, Chiapas. Farms 11–12. Escárcega, Campeche.

Table 2.

Prevalence of the main genera of gastrointestinal parasites in cattle from the municipalities of Salto de Agua, Chiapas, and Teapa, Tabasco, Mexico.

	Date	*Trichostrongylids*^¥	*Strongyloides*	*Trichuris*	*Dictyocaulus*	*Toxocara*	*Coccidia*
Farm 1 DNA	May-22	66.7	73.3	-	6.7	-	-
Salto de Agua, Chis.	June-22	52.9	88.2	11.8	17.7	-	17.7
	August-22	51.4	-	-	-	-	-
	September-22	81.8	-	10.0	-	-	-
Farm 2 DRG	May-22	76.7	26.7	6.5	3.2	6.5	25.8
Salto de Agua, Chis.	June-22	16.0	-	3.9	-	23.1	3.9
	August-22	36.8	2.6	2.6	-	-	-
Farm 3 GCh	May-22	92.9	57.4	-	-	-	-
Teapa, Tab.	June-22	35.7	71.4	-	-	-	14.3
Farm 4 DNT	June-23^ψ	33.3	7.4	4.0	4.0	-	36.0
Salto de Agua, Chis.	July-23	44.4	22.2	-	4.0	4.0	12.0
	August-23	29.6	14.8	-	4.0	-	4.0
	September-23	57.4	20.4	-	-	-	-
	October-23^θ	63.0	3.7	4.0	-	4.0	-
	November-23	63.0	-	-	-	-	-
	December-23	70.4	3.7	-	-	-	54.0

¥ Include Haemonchus, Cooperia, and Oesophagostomum.

ψ Mammomonogamus spp.,

θ Moniezia sp.

Table 3.

Severity of infection by trichostrongylids and Strongyloides spp. in pre-weaning calves in the municipality of Salto de Agua.

Farms	Month	N	Trichostrongylids^¥		Strongyloides
Farms	Month	N	Mean	SD	Mean	SD
Farm 1 DNA	May	31	216	240	71	210
	June	26	29	87	2	10
	August	39	46	94	0	0
Farm 2 DRG	May	15	353	616	16,877	54,504
	June	17	100	129	959	1566
	August	46	92	122	0	0

¥ Include Haemonchus, Cooperia, and Oesophagostomum

Fecal nematode egg counts during the study for two groups of calves (dewormed and non-dewormed) on farm 4 (DNT). One calf had a notably high count of 35,000 eggs per gram of feces (EPG), resulting in an average value of 3,690 EPG for the dewormed group.

Fecal egg count trends of *Strongyloides* spp. throughout the study, categorized by treatment.

Table 4.

Average fecal nematode egg count by treatment and sex of calves.

Treatment	Sex	EPG^*	Strongyloides
Deworming	Female	193	376
Deworming	Male	814	722
No deworming	Female	316	246
No deworming	Male	278	84

* Eggs per gram of feces of trichostrongylids

Table 5.

Severity of Fasciola hepatica and paramphistomid infection in cattle in the municipality of Salto de Agua, Chiapas.

	N	Mean	SE	Rank	Mean	SE	Rank
Farm DNA	96	3.9^a	1.2	0 – 88	3.3^a	1.0	0 – 60
Farm DRG	78	0.3^b	0.1	0 – 4	1.0^b	0.2	0 – 8
Sampling-May	46	3.5^a	2.0	0 – 88	2.2^a	1.2	0 – 52
Sampling-June	43	5.0^ab	1.6	0 – 44	1.1^a	0.8	0 – 32
Sampling-August	85	0.3^b	0.1	0 – 4	2.8^a	0.8	0 – 60
Females	66	2.2^a	0.9	0 – 44	2.1^a	0.6	0 – 32
Males	51	4.4^a	2.0	0 – 88	1.4^a	1.0	0 – 52

[i] Different letters for each variable represent significant differences (p<0.05). SE: Standard error

Genera of gastrointestinal nematodes identified morphologically in the larval stage.

References

Authors

Metrics

Articles in this issue

DOI: https://doi.org/10.2478/helm-2025-0003 | Journal eISSN: 1336-9083 | Journal ISSN: 0440-6605

Journal RSS Feed

Language: English

Page range: 30 - 39

Submitted on: Jan 28, 2025

Accepted on: Feb 26, 2025

Published on: May 24, 2025

Published by: Slovak Academy of Sciences, Institute of Parasitology

In partnership with: Paradigm Publishing Services

Publication frequency: Volume open

Keywords:

endoparasites,

gastrointestinal nematodes,

Related subjects:

Zoology,

Ecology,

Life sciences, other,

Medicine,

Clinical medicine,

Microbiology, virology and infection epidemiology

© 2025 C. Y. León-González, R. González-Garduño, J. M. Hernández-Domínguez, F. L. Peña-Escalona, A. Villa-Mancera, L. Aguilar-Marcelino, published by Slovak Academy of Sciences, Institute of Parasitology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 62 (2025): Issue 1 (March 2025)

Factors affecting the prevalence of endoparasites in pre-weaning calves in a warm humid climate of Mexico

Figures & Tables

Table 1.

Table 2.

Table 3.

Fig. 1.

Fig. 2.

Table 4.

Table 5.

Fig. 3.

Paradigm

My account