CA2484837C - Antimicrobial additive for large animal or poultry beddings - Google Patents

Antimicrobial additive for large animal or poultry beddings Download PDF

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Publication number
CA2484837C
CA2484837C CA2484837A CA2484837A CA2484837C CA 2484837 C CA2484837 C CA 2484837C CA 2484837 A CA2484837 A CA 2484837A CA 2484837 A CA2484837 A CA 2484837A CA 2484837 C CA2484837 C CA 2484837C
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clay
based particulate
antimicrobial agent
use according
stall
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CA2484837A1 (en
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Peter Aylen
Steve Gurney
Dean Clark
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Progressive Planet Products Inc
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Absorbent Products Ltd
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K1/00Housing animals; Equipment therefor
    • A01K1/015Floor coverings, e.g. bedding-down sheets ; Stable floors
    • A01K1/0152Litter
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K1/00Housing animals; Equipment therefor
    • A01K1/015Floor coverings, e.g. bedding-down sheets ; Stable floors
    • A01K1/0152Litter
    • A01K1/0154Litter comprising inorganic material
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/08Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Health & Medical Sciences (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Housing For Livestock And Birds (AREA)

Abstract

The present invention provides a method for reducing ammonia levels, odour, microorganisms and insects in large animal stalls using a bedding material additive comprising a clay-based particulate absorbent material and an aliphatic bromo-nitro- bactericide

Description

ANTIMICROBIAL ADDITIVE FOR LARGE ANIMAL OR POULTRY
BEDDINGS

FIELD OF THE INVENTION

The present invention pertains to the field of bedding materials for use in large animal stalls and poultry barns.

BACKGROUND
The respiratory systems of horses, cattle, hogs and poultry can be harmed by the presence of ammonia in their barns, stalls, pens and other enclosures. At high enough levels,, the damage can adversely affect weight gain and feed conversion [Carr and Nicolson, 1980:
`Broiler Response to three Ventilation rates, Am Soc.Arg.Eng 2: 414 - 418]. It is therefore desirable to reduce the quantity of ammonia to which these animals are exposed.

Ammonia is formed by enzymatic hydrolysis of urea, which is present in animal waste.
The hydrolysis is catalyzed by the enzyme urease, which is produced by certain microorganisms that are commonly found in animal waste. Inhibition of microbial growth through the addition of an antimicrobial agent to animal waste should therefore reduce ammonia production.

Inhibiting microbial growth is also desirable because certain microbes can directly harm animals. For example, Staphylococcus, Streptococcus and Escherichia coli bacteria cause mastitis, a disease of the mammary tissue of dairy cows. Other bacteria have been known to increase the mortality rates of poultry and reduce weight gain in other animals.

The concept of using a particulate absorbent material comprising an antimicrobial agent such as BronopolTM is taught in the art (see Baldry et. al US 5,109,805). The product disclosed in Baldry et al. is a small animal litter for household pets, particularly cats.

As a household pet litter, clay based absorbent materials are typically used in un-admixed form and in sufficient quantity to effectively absorb the entire volume of the pet urine into the particulate material to maintain dry conditions in the litter box. For this purpose, clay-based materials, which have good absorbency characteristics, are commonly used. In such applications, all or substantially all of the absorbed urine is brought into intimate contact with the antibacterial agent carried in or on the particulate absorbent material thereby establishing conditions favourable to significant reductions in bacterial growth in litter applications disclosed in Baldry et al.

However, large animal stall and poultry barn bedding applications are subject to vastly different conditions than those of domestic pet litter applications. In order to cope with the very large volumes of urine produced by large animals such as horses and cows, or large numbers of animals, such as poultry or hogs, absorbent stall bedding materials must be applied to the stall floor in large quantities and changed frequently. In view of cost considerations, a clay-based absorbent material such as the domestic litter disclosed in Baldry et al. is excluded as a suitable large animal stall bedding material. Instead, the bedding materials of choice for large animal stalls and poultry barns are wood shavings and/or saw dust and/or straw, which are commonly available at a relatively low price.

While Baldry et al. discloses that antibacterial agents can be incorporated into or surface treated onto a variety of other absorbent particulate materials, the cost of treating wood shavings or straw with a bactericidal agent in the manner disclosed in Baldry et al.
would be prohibitive and effectively excludes such an application of the teachings of Baldry et al.
to large animal stall applications.

As noted in Baldry et al. at column 2, line 64 to column 3, line 7, the presence and nature of the absorbent material exercises a considerable effect on bactericidal action, and a given bactericidal agent may be more or less effective against bacteria in urine alone or depending on the particular absorbent material of which the litter is composed. Thus, the effectiveness of anti-bacterial agents in small animal litter applications such as those disclosed in Baldry et al. is not a reliable indicator of their effectiveness in the radically different large animal stall applications. or in instances such as poultry barns where larger areas require treatments.

Therefore a need remains for a cost-effective method of employing the antimicrobial properties of known bactericidal materials to large animal stall applications.
SUMMARY OF THE INVENTION

In accordance with one aspect of the invention there is provided a method of.
reducing ammonia levels in a large animal stall or poultry barn comprising the step of applying an additive comprising a clay-based particulate, wherein said particulate contains an antimicrobial agent, over the floor of an animal stall or barn in an amount of between 0.22 kg/m2 and 0.43 kg/m2.
BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a graph showing the mean ammonia levels (ppm) measured 30 cm above the manure over the test period using a clay-based particulate material with an antimicrobial agent (`Barn Fresh Plus") and without any treated material, (control) shavings alone.

Figure 2 is a graph showing the percent difference in ammonia levels between untreated sections and sections treated with a clay based particulate material with an antimicrobial agent (`Barn Fresh Plus").

Figure 3 is a graph showing mean (t SE) of pooled (0-14 days) ammonia levels (ppm) under pine wood shavings in horse stalls treated with a clay-based particulate material with an antimicrobial agent ("NewSD"), a clay-based particulate material without an antimicrobial agent ("OldSD") and untreated controls before rotation of treatments.

Figure 4 is a graph showing mean (t SE) of pooled (0-7 and 14 days) ammonia levels (ppm) on urine soaked wooden floors in horse stalls treated with a clay-based particulate material with an antimicrobial agent ("NewSD"), a clay-based particulate material without an antimicrobial agent ("O1dSD") and untreated controls after rotation of treatments.

Figure 5 is a graph of mean ( SE) of ammonia levels (ppm) on urine soaked wooden floors in horse stalls two days after treatment with a clay-based particulate material with an antimicrobial agent ("NewSD"), a clay-based particulate material without an antimicrobial agent ("OldSD") and untreated controls after rotation of treatments.

Figure 6 is a graph of mean ( SE) of ammonia levels (ppm) on urine soaked wooden floors in horse stalls 14 days after treatment with a clay-based particulate material with an antimicrobial agent ("NewSD"), a clay-based particulate material without an antimicrobial agent ("O1dSD") and untreated controls after rotation of treatments.

DETAILED DESCRIPTION OF THE INVENTION

The method of the present invention reduces ammonia levels in a large animal stall or poultry barn and comprises the steps of the applying a minor amount of a clay-based particulate material comprising a antimicrobial agent and d-a major amount of an absorbent bedding material over the floor of an animal stall or barn. It has surprisingly been found that a clay-based particulate which contains an antimicrobial agent can be used in relatively small amounts in combination with inexpensive bedding materials such as wood shavings, saw dust or straw, which are commonly used in large animal stalls or poultry barns, to reduce microbial growth and thus decrease ammonia production caused by micro organisms associated with animal waste.

The clay-based particulate can comprise any of a number of suitable clay minerals including smectite, attapulgite, sepiolite, bentonite, kaolinite, gypsum, and zeolite.
Preferably, the clay mineral is montmorrillonite. Optionally, the average particle size of the clay-based particulate is approximately -24 mesh.

Most preferably, the clay material is a naturally occurring mixture of montmorrillonite clay and diatomaceous earth such as is available from Western Industrial Clay Products under the trade names Barn FreshTM and Stall DryTM. Not only does the montmomllonite clay have exceptional absorbency characteristics which makes it suitable for absorbing urine that has passed through the straw,. saw dust or wood shaving bedding materials, the diatomaceous earth component is effective as an insecticidal agent to reduce the number insects or insect larvae in the stall or barn.

Preferably, the antimicrobial agent is 1,3-Propanediol, 2-bromo, 2-nitro, which is sold in powder form 'under the trade name BronopolTM and in liquid form under the trade name MyacideTM and is present in the clay-based particulate in a concentration of from 50 to 250 ppm.
The antimicrobial agent can be combined into the clay-based particulate in the manner described in Baldry et al. In particular, the antimicrobial agent may be admixed with the clay material during the particle forming process. In the alternative, particles of the clay based-particulate are treated with the antimicrobial. agent, by means of the clay travelling through - a gravity fed 6"
diameter pipe at a flow rate of approximately 3.5 tonnes per hour. The clay material passes through a misting spray of antimicrobial agent at a pre-determined, pre-mixed concentration. In an alternative method of application, a known amount of clay travelling on a moving conveyor belt is sprayed with MyacideTM at an application rate pre-determined to achieve 250ppm, or other desired concentrations.

In addition to the use of BronopolTM or MyacideTM as the antimicrobial agent, an ammonia reducing agent such as phosphoric acid, citric acid, acetic acid or aluminium sulphate and a urease inhibitor such as cyclohexylphosphoric triamide, phenyl phosporodiamidate, or n-(n-butyl) thiophosporic triamide can also be incorporated into or surface treated onto the clay-based particulate to further reduce the level of ammonia production.

In accordance with one aspect of the present invention, the clay-based particulate comprising the antimicrobial agent is first applied over the stall or barn floor, preferably in an amount of between 0.22 kg/m2 and 0.43 kg/m2. Thereafter, a layer of straw and/or wood shavings and/or sawdust in an amount and manner as is conventionally used ' in stall or barn applications is applied over the clay-based particulate. When used in this manner, the inexpensive straw and/or wood shavings and/or- saw dust bedding material is used as the primary absorbent material, thereby permitting a relatively small quantity of the more expensive clay-based particulate to be used. By applying the clay-based particulate first, is remains in direct contact with the floor of the barn or stall where pools of urine tend to collect.

In accordance with another aspect of the invention, the clay-based particulate comprising the antimicrobial agent can be applied to the stall or barn floor, preferably in an amount of between 0.22 kg/m2 and 0.43 kg/m2, after a primary absorbent bedding material such as wood shavings, saw dust or straw has been applied. An advantage of this embodiment is that the additive can be applied without first clearing the floor of bedding material.
It helps to dry the bedding material, thereby increasing its usage time and reducing bedding costs.

In accordance with yet another aspect of the invention, a minor amount of the clay based particulate comprising the antimicrobial agent can be admixed with a major amount of the absorbent bedding material such as wood shaving, saw dust or straw, preferably in a weight ratio of from 25:1000 to 75:1000, prior to application to the stall or barn floor.
An advantage to this specific embodiment is that the application of clay particulate and absorbent bedding material can be accomplished in a single step. Furthermore, mixing in this manner tends to avoid the need of multiple applications of materials, particularly in poultry barns where 2 applications (one for bedding and one for clay particulate) would increase the operational costs.

5. EXAMPLES
EXAMPLE 1: Ammonia Emissions from Poultry Manure The study was undertaken in a standard high rise caged layer-facility that housed approximately 36,000 birds that were 19 weeks old and had been housed in the barn for 7 days at the beginning of the study. Manure was about 1 cm deep over a pine wood shavings base. The manure area was comprised of four pits (rows) each measuring 1.2 in x 90.9 in.
The rectangular-shaped barn was oriented in a north-south direction with air circulating fans on the east side and pit fans on the west side of the pit area.

A naturally occurring binary mineral particulate of about 50% diatomaceous earth and about 50% montmorrillonite clay into which had been incorporated commercially available BronopolTM to yield a concentration of about 50 ppm was applied at a rate of 0.27 kg/m2 over an area covering approximately 44% of the manure on all four pits for a distance of 40 in from the south wall of the barn. This comprised the treated section of the manure. The untreated section of the manure covered a distance of 40 in from the north wall of the barn. A
buffer section of approximately 10 in was maintained between the treated and untreated sections.

Ammonia was measured at sixteen different locations in the treated and.
untreated sections immediately after application of the additive and once daily for the 11 day duration of the study. The measuring locations were located on the first and third rows from the east wall of the barn.

A PassportTM Five Star Person Alarm (Mine -Safety Appliances Company, Pittsburgh, Pennsylvania U.S.A.) was used to measure ammonia levels. The device was held approximately 20 cm above the centre of the manure pit during measurements.
Statistical comparisons between the treated and untreated sections were analysed using the Student's t-test method. The t test employs the statistic (t), with n-1 degrees of freedom, to test a given statistical hypothesis about a population parameter. The method is suitable for use with small sample sizes (<30) and when population standard deviation is unknown.
RESULTS
Mean ammonia levels measured over the untreated section were significantly (a < 0.001) higher than levels measured over the treated section for each day of the study (see Figure, 1).
Expressed as a percentage, the untreated sections had ammonia levels of between 111 per cent and 522 per cent higher than the treated areas over the course of the study (see Figure 2).

The permissible ammonia exposure limit (PEL) as published by the AIHA
(American Industrial Hygiene Association) is 25 ppm. As can be seen in Figure 1, the untreated sections had reached this threshold by day 11, whereas the treated sections remained well below the limit at the conclusion of the study. Thus, the present invention can be employed to both reduce ammonia levels and increase times between manure cleanings in poultry facilities.

These results are surprising given that the additive was not used as the primary absorbent, but only a minor quantity was used in admixture with a major quantity of conventional sawdust bedding. This is important because during the first 10-14 days after a new flock of chickens is placed in a barn, mortality rates of chicks' increases with higher ammonia levels.

EXAMPLE 2: Ammonia Emissions from Horse Manure Six stalls in a cutting-horse operation were numbered and assigned to one of the following treatments:

1. A 'naturally occurring particulate comprising a mixture of about 50%
diatomaceous earth and about 50% montmorrillonite clay (without antimicrobial agent) sold under the trade name Stall Dry7m ("OriginalSD").
2. A naturally occurring binary mineral particulate of about 50% diatomaceous earth and about 50% montmorrillonite clay into which had been. incorporated commercially available BronopolTM to yield a concentration of about 50 ppm ("AntibacSD").

3. No treatment ("Control").

5. The wood floors of the stalls were stripped of all shavings and treatments were applied in a quantity of 0.32. kg/m2. The floor of each stall was then covered with 0.85 m3 of clean pine wood shavings. Ammonia levels were measured using a Passport Tm Five Star Personal Alarm at between 3 and 5 locations in each stall, above and below the shavings, each day for the 14-day duration of the study.

At the mid-point of the study (7 days), the stalls were cleaned of shavings.
Ammonia measurements were taken with the ammonia meter placed directly on the floors of the stalls.
One kilogram of test materials was sprinkled directly onto urine spots on the floors of the stalls and a fresh layer of shavings was placed over the stall floors.

After the initial 14 days of the study, the stalls were again stripped of shavings and the treatments. were rotated by one stall in an anti-clockwise manner. Ammonia measurements were continued daily for 7 days and then on a weekly basis for 4 weeks.

The assignment of treatments was as follows. Before rotation, treatment 1 without antimicrobial agent (Original SD) was assigned to stall numbers 3 & 4, treatment 2 with BronopolTM (AntibacSD) to stall numbers 5 & 6 and treatment 3 (Control) to stall numbers 7 &
S. After rotation, treatment 1 was assigned to stall numbers 3 & 8, treatment 2 to stalls 4 & 5 and treatment 3 to stalls 6 & 7.

All ammonia measurements were statistically analyzed by ANOVA (Analysis of 'Variance) and Student's t-test methods.

RESULTS
The mean ammonia levels recorded under the wood shaving bedding materials before and after rotation are set out in Figures 3 to 6. Table 1 below summarizes results of ammonia measurements at different time intervals.
Table 1. Mean ( SE) Ammonia Levels (PPM) Under Wood Shavings Before Treatment Rotation for Treatments 1, 2 and 3.

Day # Treatment Mean ( SE) ANOVA Output Ammonia Level 1-14 2 (Antibac) 11.4 1.52 DF 116 1 (Original SD) 19.7 3.02 F Ratio 5.886 3 (Control) 25.4 3.91 Prob>F 0.0037 The additive reduced ammonia levels measured below the shavings by* an average of approximately 53.1 per cent over the 14 days of the study.

Table 2 below summarizes the results of ammonia measurements before rotation of treatment.

Table 2. Mean ( SE) Ammonia Levels (PPM) Measured Under Wood Shavings During the First Two Weeks in the Initial Stall before Treatment Rotation for Treatments 1, 2 and 3.

Day # Treatment Mean ( SE) ANOVA Output Ammonia Level Period 2 (Antibac SD) 16.4 2.66 DF 120 1-14 1 (Original SD) 22.7 2.28 F Ratio 4.737 3 (Control) 28.4 3.25 Prob>F 0.0105 Day 2 2 (Antibac SD) 27.3 8.61 DF 17 1(Original SD) 28.7 6.84 F Ratio 1.295 3 (Control) 44.2 .9.04 Prob>F 0.3027 Day 14 2 (Antibac SD) 17.3 6:49 DF 17 1(Original SD) 25.3 4.59 F Ratio 1.272 3 (Control) 28.3 3.62 Prob>F 0.3089 For pooled data of ammonia measurements taken from under the treatment areas over the entire duration of the trial, significantly lower levels of ammonia were recorded in stalls treated with AntibacSD compared to stalls treated with shavings alone. An average reduction of 42 per cent in ammonia levels was achieved. Further results are listed in Figures 3-6 below The results of the study show that the use of the clay-based particulate comprising BronopolTM bactericide reduced the hydrolysis of ammonia on wood floors of horse stables.
Ammonia reduction in stalls treated with the additive was as much as 66 per cent lower than levels in untreated stalls. Since the use of the same clay-based particulate without microbial agent produced only slight reductions in ammonia relative to untreated stalls, the ammonia reduction observed in stalls treated with the additive was due to the inhibition of microorganisms responsible for urease production.

As in Example 1, these results are surprising given that the additive was not used as the principal absorbent, but was used in minor quantities in combination with a conventional wood shavings absorbent bedding material.

Ammonia control action can be improved by either increasing the concentration of the antibacterial compound or by adding other materials having ammonia control activity including phosphoric acid, citric acid, acetic acid, aluminum sulphate and urease inhibitors including cyclohexylphosphoric triamide, phenylphosphorodiamidate and n-(n-butyl) thiophosphorictriamide.

Claims (18)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY OR
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A use, for reducing ammonia levels in large animal stalls or poultry barns, of a minor amount of a clay-based particulate material comprising a antimicrobial agent in combination with a major amount of an absorbent bedding material over the floor of said stall or barn.
2. The use according to claim 1, wherein said antimicrobial agent is 1,3-Propanediol, 2-bromo, 2-nitro (Bronopol.TM.).
3. The use according to claim 1 or 2, wherein said clay-based particulate comprises montmorillonite.
4. The use according to claim 1, 2 or 3, wherein said clay-based particulate comprises mixture of montmorillonite and diatomaceous earth.
5. The use according to any one of claims 1 to 4 wherein said antimicrobial agent is present in said clay based particulate at a concentration in the range of from 50 to 250 ppm.
6. The use according to any one of claims 1 to 5 wherein said clay-based particulate material is applied at a rate of from 0.22 kg/m2 to 0.43 kg/m2.
7. The use according to any one of claims 1 to 6, wherein the average particle size of said clay-based particulate is approximately -24 mesh.
8. The use according to any one of claims 1 to 7, wherein the absorbent bedding material is selected from the group consisting of straw, saw dust and wood shavings.
9. The use according to any one of claims 1 to 8 wherein said minor amount of the clay-based particulate material comprising the antimicrobial agent is in a form for application to the floor of said stall or barn and the major amount of said absorbent bedding material is in a form for application over said clay-based particulate.
10. The use according to any one of claims 1 to 8 wherein said minor amount of the clay-based particulate material comprising the antimicrobial agent is admixed with said major amount of said absorbent bedding material prior to use.
11. The use according to any one of claims 1 to 8 wherein said major amount of said absorbent bedding material is in a form for application over the floor of said stall or barn and said minor amount of the clay-based particulate material comprising the antimicrobioal agent is in a form for application over said absorbent bedding material.
12. A material for reducing ammonia levels in large animal stalls or poultry barns comprising in combination a minor amount of a clay-based particulate material comprising an antimicrobial agent and a major amount of an absorbent bedding material.
13. The material according to claim 12, wherein said antimicrobial agent is 1,3-Propanediol, 2-bromo, 2-nitro (Bronopol.TM.).
14. The material according to claim 12 or 13, wherein said clay-based particulate comprises montmorillonite.
15. The material according to claim 12, 13 or 14, wherein said clay-based particulate comprises mixture of montmorillonite and diatomaceous earth.
16. The material according to any one of claims 12 to 15 wherein said antimicrobial agent is present in said clay based particulate at a concentration in the range of from 50 to 250 ppm.
17. The material according to any one of claims 12 to 16, wherein the average particle size of said clay-based particulate is approximately -24 mesh.
18. The material according to any one of claims 12 to 17, wherein the absorbent bedding material is selected from the group consisting of straw, saw dust or wood shavings.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017093998A1 (en) * 2015-11-30 2017-06-08 Alonim Breeders Farm Ltd System for prevention of infectious diseases

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017093998A1 (en) * 2015-11-30 2017-06-08 Alonim Breeders Farm Ltd System for prevention of infectious diseases

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