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1Animals Pathology and Reproduction Control Laboratory (P.A.G.R), Veterinary Institute, University of Constantine, Algeria
2Department of Agronomic Sciences, University of M’Sila, Algeria
3Department of Nature and Life Sciences, University of Biskra, Algeria
Submission: May 17, 2019; Published: June 19, 2019
*Corresponding author: Mammeri Adel, Department of Agronomic Sciences, M’Sila University, Chaâbane Abd Hafidh Avenue, M’Salah City, Biskra 07000, Algeria
How to cite this article: Mammeri A, Kayoueche F Z, Benmakhlouf A, Retima Z. Correlation between Tail Length and Rate of Infected Quarters in
Montbéliarde and Ameliorated Dairy Cattle, Algeria. Dairy and Vet Sci J. 2019; 12(4): 555843. DOI: 10.19080/JDVS.2019.12.555843
This study aimed to evaluate the impact of the tail’s length of Modern Dairy Cattle and Ameliorated Dairy Cattle on the rate of infected quarters.12 lactating cows were randomly selected; 6 breed Montbéliarde and 6 Ameliorated Dairy Cattle, subsequently the distance between the tail edge and the ground was measured with a tapeline. Then, California Mastitis Test was realized on milk samples collected from the 4 teats of each cow. Spearman test (p < 0.01) showed that contamination risks of teats surface via the cow’s tail, were associated to Ameliorated Dairy Cattle breeding and environmental hygiene level (litter).
Keywords: Tail length; Cattle genotype; Mastitis; Tank contamination; Algeria
Several studies showed that genetic selection affects the harmony of the compliance of the body (especially the hip height) . The cows breed Montbéliarde (Mt) are among the most imported Modern Dairy Cattle (MDC) cows in Algeria. Also, according to skin color, the Ameliorated Dairy Cattle (ADC) cows include two dominant types; ADC-Pie Rouge (ADC- PR) and ADC-Pie Noire (ADC- PN). ADC cows are the result of several crossbreeds between the Algerian local cattle populations and the MDC breeds . In Algeria, crossbreeding operations are mainly made by unqualified breeders, affecting thus the general harmony of different body parts of progeny. The cow’s tail is one of these affected parts, being consequently of variable length that is not always correlated to hip height, additionally to be among the most moving organs and exposed to various environmental contaminants, in simultaneity of being relatively promiscuous to the surface of the teats. Accordingly, tail length should be considered as a principal factor of variability in rates of infection of the udder. This comparative study aimed to evaluate and compare the impact of tail length and cattle category, on the California Mastitis Test (CMT) positivity rate and the number of infected quarters in Mt and ADC cows.
We visited 3 dairy cattle farms, located in the region of Doucen (governorate of Biskra). All herds had similar hygienic profiles. From lactating cows, we randomly chosen 6 Mt, 5 ADC- PR and one ADC- PN, then the distance between the end edge of the tail and the surface on the ground (DTG) was measured with a tapeline. After that, we realized a CMT test on milk samples collected from the 4 teats of each cow. CMT reaction was numbered from 0 to 4. The relationship between the number of cells and the score of CMT, was approximately established from the results of Schalm and Noorlander  and Schneider . The quarters with a score ≥ 2, was considered infected. The quarters with score ranging from 0 to 1, are classified uninfected. Statistical analysis via SPSS version 20. , included Spearman test (p < 0.01) between the variable cow category (MDC /ADC) and the variable DTG.
Results showed that all Mt cows (n=6) had DTG ≥ 15 cm, whereas (5/6) of ADC cows had DTG ≤ 15 cm. The DTG showed an average value (21.33 ± 5.77cm) for the Mt cows, and (10.17 ± 8.22cm) for the ADC cows. The minimum values of DTG were recorded for the cows coded; ADC-PN-8 (00 cm), ADC-PN-12
(04cm), ADC-PR-7 (05 cm) and ADC-PN-10 (07cm) (Table 1).
Statistical analysis via SPSS version 20. (IBM, 2011), using
Spearman test (p < 0.01) between the variable cow category (MDC
/ADC) and the variable DTG, was highly significant (p = 0.001).
Also, (2/6) of Mt cows had at least one of the posterior quarters
that is infected, whereas (4/6) of ADC cows had at least one of
the posterior quarters that is infected. Only (1/6) of Mt cows,
had two posterior quarters that were simultaneously infected, in
opposition to (3/6) of the ADC cows with two quarters that were
simultaneously infected (Table 1).
MDC: Modern Dairy Cattle; ADC: Ameliorated Dairy Cattle; Mt: Montbéliadre; PN: Pie Noire; PR: Pie Rouge; DTG: distance between the end edge
of the tail and the surface on the ground; PL: Posterior Left; PR: Posterior Right; AL: Anterior Left; AR: Anterior Right.
About 96% of Algerian farmers hold a herd of less than 6
dairy cows . Relatively small dairy ADC herds (1- 6 cows),
are located in mountainous and forest areas, and are the result
of multiple crossbreeds between the local population, primarily
the Brune de l’Atlas and the imported breeds . In these herds,
mechanical milking, is generally reserved to herds inserted into
a milk collection organisms, however, hand milking is dominantly
practiced in the rest of the herds. Thus, the contamination risks
of milking vessel content during milking, on one hand, and the
surface of the teats, on the other hand, via the cow’s tail, seem
to be associated to DTG and environmental hygiene level (litter).
These risks are amplified by the fact that in Algeria, a very small
part of ADC cow’s milk is collected, but dairy products are mainly
oriented, in the raw status, to self-consumption, donation and
feeding calves . Also, zoonotic and abortive risks cannot be
excluded in such circumstances [9,10].
It is urgent to avoid the generalization of the ADC category,
without considering the influence of cattle anarchic crossbreeding
on the welfare of future progeny, on susceptibility to infections of
cow’s mammary glands and thus the safety of their milk. Therefore,
it is suitable to adapt the dairy cow’s genotype to dominant cattle
breeding system. Crossbreeding operations and genetic selection
should be exclusively accomplished by qualified personnel but not