60 results about "In ovo" patented technology

The disclosure provides a method for administering an agent to an avian species by in ovo delivery of an implant releasably containing the agent. In one embodiment, the method is particularly advantageous for stimulating an immune response in a bird by in ovo administration of a biocompatible implant releasably containing an immunogen. The implant can provide for sustained or delayed release of the immunogen or both. The amount of immunogen that is released from the implant into the bird is preferably sufficient to effectively stimulate a primary immune response to the immunogen. Other agents which can be administered according to the method of the invention are disclosed.

Methods are provided for improved immunization against coccidiosis and other bacterial, viral, or parasitic diseases in poultry. One method includes administering a solution of Propionibacterium acnes suspended in normal saline to a chick at age day one, following hatching. An anticoccidial vaccine and/or other vaccine is then administered to the chick such as by oral administration. Alternatively the method includes the steps of aseptically injecting Propionibacterium acnes in ovo at about day 18 in development, followed by post-hatching vaccination with an anticoccidial vaccine and/or other vaccine. Alternatively, either method can be utilized without the subsequent vaccination step for stimulating non-specific cell-mediated immune responses in poultry.

An in ovo jet injection apparatus and related methods for treating live eggs. The jet injection apparatus includes one or more jet injection delivery devices configured to deliver one or more treatment substances to predetermined areas of eggs using a high pressure stream of the treatment substance(s). Multiple treatment substances can be delivered so that they are spatially and/or temporally separate. The devices and methods of the invention enable the effective use of a plurality of treatment substances, including those that are effective when used alone but can be noxious if mixed. The methods and apparatus for the jet injection of substances into embryonic chicks reduce the risk of mechanical injury to the developing birds that would be caused by injection needles. The methods and apparatus of the invention can also reduce the introduction of an infection into the chicks.

In ovo injection methods and apparatus are provided wherein multiple substances, particularly incompatible substances such as oil-based and aqueous-based substances, can be injected without reducing efficacy of the substances and without requiring complex mechanical injection devices. Injection of multiple substances may occur simultaneously or sequentially.

The present invention relates to methods of modulating traits, particularly production traits, in avians such as chickens. In particular, the invention relates to the in ovo delivery of a dsRNA molecule, especially siRNAs, to modify production traits in commercially important birds.

A method of injecting a plurality of bird eggs comprises: (a) orienting a plurality of avian eggs in a predetermined position; (b) forming an opening in the shell of each of the eggs; (c) extending an elongate delivery device through each of the openings and into the eggs, each of the delivery devices comprising a detector and an injection needle, with the injection needle having a lumen formed therein; (d) detecting with the detector information from the interior of each of the plurality of eggs; and (e) injecting a substance into each of the plurality of eggs through the lumen of said injection needle. The detected information can be used for a variety of purposes, including adjusting the depth of penetration of the injection needle to more precisely control the location of the injection, identifying the gender of the eggs for subsequent sorting of the eggs, distinguishing viable from non-viable eggs, etc. When used for controlling depth penetration, the method positions the needle tip for any purpose, including withdrawing biological material as well as injecting substances. Apparatus, particularly high-speed apparatus, for carrying out the method is also disclosed.

The present invention relates to a process for the non-destructive determination of gender, developmental stage and/or viability of an avian embryo in an egg, comprising (a) detecting at least a first developmental marker compound selected from sugars and/or amino acids, precursors and metabolites thereof in an egg at a time period of from the beginning of the incubation of the egg until the hatching; (b) measuring the amount of the at least first detected developmental marker compound, and (c) comparing the amount to a base line established for male and female, developmental stage of the embryo, and/or alive and deceased or non-developed embryo, to determine whether the embryo is viable, male and/or female, and/or the developmental stage of the embryo.

The invention discloses a method for injecting leptin into egg white, and belongs to the technical field of animal growth regulation. The method comprises: before incubation, disinfecting the small end of a hatching egg; drilling a hole lightly on the disinfected part by a toad marrow puncture needle; injecting leptin injection reagent into the egg white through the hole by a micro injector; and sealing the hole by paraffin. After the leptin with certain concentration is injected into the egg white, the leptin is observed to inhibit the development of embryo of table poultry and reduce body weight of newly hatched offspring, but promote early growing development of the table poultry after hatch, and the leptin can be taken as semiochemicals to mediate the routinization effect on the early growing development of filial generations of the table poultry.

The invention relates to a method of vaccinating a domesticated bird against coccidiosis comprising administering in ovo an effective immnunizing dose of live Eimeria sporozoites or merozoites, or a mixture thereof. In a preferred embodiment, the domesticated bird that is vaccinated is a chicken or turkey.

The invention comprises an apparatus and a method of effecting localized electroporation in a relatively small target area and for introducing foreign matter into cellular material in which the target area is located. The cellular material may be in vitro, in ovo or in vivo.

The present invention relates to a method for non-destructively identifying a characteristic of a Gallus Gallus domesticus embryo in ovo, the method comprising: (a) obtaining a sample of material associated with an egg comprising the embryo, and (b) measuring a score value for the presence of, and concentration of at least a first biomarker in the sample indicative of the characteristic of the embryo, and (c) applying a threshold to the score value and concentration obtained in (b) to identify the characteristic for the embryo associated with the presence and concentration of the biomarker, wherein an at least first biomarker comprises an amino compound having a molecular weight in the range of from 140 to 190 g/mole, wherein step (c) further comprises: (i) correlating each relevant biomarker signal with a reference biomarker by matching the spectrum of each correlating signal with the expected spectrum of the correlating reference biomarker using a similarity measure, to define at least one positively correlating signal; (ii) measuring the intensity of each positively correlating signal and scoring its absolute and/or relative signal intensity; and (iii) applying a threshold to the score value obtained from a similarity function to determine the correlated embryo characteristic.

The present invention is directed to processes and compositions for protecting host animals (e.g., chickens) from exposure to virulent infectious bronchitis virus. In ovo administration of live, avirulent strains of IB at appropriate dosage levels on a per egg basis provides an effective and efficient vaccination having acceptable safety and efficacy features.

Systems and methods for processing sets of eggs with improved sanitation treatment are provided. A method includes obtaining information about a set of eggs to be processed in ovo, and/or determining the number of non-live eggs in the set, selecting a sanitizing treatment for in ovo processing equipment to be used in processing the set of eggs, wherein the selected sanitizing treatment is based on the obtained information and/or number of non-live eggs in the set, processing the set of eggs via the in ovo processing equipment (e.g., injecting a substance into the eggs, and/or removing material from the eggs), and sanitizing the in ovo processing equipment according to the selected sanitizing treatment. A selected sanitizing treatment may include increased frequency and/or duration, increased concentration of sanitizing fluid, applying sanitizing fluid to the shell of the eggs, and/or adding/increasing an antibiotic to a substance injected into the eggs.

The present invention provides improved methods and compositions for producing oocysts. The oocysts produced according to the invention find use in the manufacture of vaccines. In preferred embodiments, the present invention provides methods and compositions for the production of Eimeria oocysts. Vaccines containing Eimeria oocysts, sporocysts and/or sporozoites produced according to the present invention may be used to immunize birds against coccidiosis either in ovo or post hatch.