CATDOLL : CATDOLL: What are the symptoms of wheelworm disease in koi? What are the symptoms of wheelworm disease?

1. What are the symptoms of Koi Wheelworm?

If a large number of them parasitize the gills, they will have difficulty breathing. When a small number of wheelworms parasitize the body surface, there will be almost no symptoms on the body surface. If a large number of wheelworms are confirmed under a microscope, the mucus on the body surface of the fry will become less smooth and inactive. If they reproduce further, they will lose their appetite, float close to the water surface, gather at the water inlet, and move slowly, sometimes rubbing their bodies vigorously.

[When parasitic on the body surface], you may see loss of appetite, floating on the water surface, abnormal mucus secretion, especially white turbidity on the head, and congestion in the body. When the condition worsens, the whole body is covered with white mucus, showing white cloud symptoms, and gradually becomes weak and is washed to the drain.

[When parasitizing on the gills] they have difficulty breathing, stay close to the water inlet, have a poor appetite, and their bodies become thinner and slimmer, with only the head appearing to become abnormally large.

When a large number of parasites reach the late stage, they will be washed into the drain due to weakness and easily die from breathing difficulties.

2. What are the symptoms of trichodinosis?

The wheelworms that invade the surface of fish are relatively large. Common ones include Trichodina salina, Trichodina scaly and Trichodina dongzu.

These wheelworms slide back and forth on the fish's body surface, causing abrasion and injury to the skin, stripping off the host's skin tissue cells for nutrition, and at the same time stimulating the skin tissue to secrete large amounts of mucus.

It mainly harms fish fry less than 3 cm in length. When severely infected, it will cause large numbers of fish deaths.

The common wheelworms that parasitize on the gills include the oval wheelworm, the tiny wheelworm and the eyebrow-shaped wheelworm.

This type of wheelworm is relatively small and often invades the gills of fish. It gathers in groups on the edges of the gills or in the gill slits, destroying the gill tissue, causing it to rot and expose the cartilage, seriously affecting the fish's respiratory function.

Fry that are seriously infected with wheelworms are extremely thin and dark, swim slowly away from the group or near the edge of the pond, and often drag a white mucus band behind their bodies. Some sick fish even swim wildly around the edge of the pond in groups.

3. What are the symptoms of fish printing disease?

Prevalence: The disease is a bacterial skin disease caused by Aeromonas punctata, characterized by skin rot and ulcers.

The pathogen is a conditional pathogen that will only infect the fish when it is damaged. It is common in summer and autumn.

Clinical symptoms: The lesions mainly occur on the trunk behind the dorsal fin and on both sides of the abdomen. The lesions appear as round or oval erythema, like a red seal on the fish body. The skin at the lesion site becomes congested, hemorrhagic and inflamed, forming ulcers, which are clearly demarcated from the surrounding normal tissues. In severe cases, bones or internal organs are exposed.

Treatment: Povidone iodine, spray the whole pond at a concentration of 0.15ml/m3 of water, mix with feed and take norfloxacin orally, 30mg/kg body weight, once a day for 3-5 days.

4. What are the symptoms of flat-mouthed trematode disease in fish?

Pathogen: The pathogen of heron flat-bent trematode disease is the adult flat-bent trematode, which parasitizes the throat and esophagus of birds of the Ardeidae family. It is beige in color, can make violent leech-like telescopic movements, and is 4-6 mm long and 1.78-2 mm wide. There is a sucker at the front end of the insect body, which is connected to the muscular pharynx below, and then to the bifurcated intestinal blind tube. The two intestinal blind tubes extend to the rear end of the insect body, and in the middle of the extension, they branch out to the side. The abdominal sucker is located in the front quarter of the insect body and is larger than the oral sucker. The excretory duct is on both sides of the insect body, and the excretory sac is small and "V" shaped. The reproductive organs are located in the middle of the body, with two testes with slightly branched outer edges, and an ovary between the two testes.

Life history: The adult trematodes of the planustomum parasitize in the throat and esophagus of the heron. When the heron eats fish, the eggs fall from the bird's mouth into the water and hatch directly into miracidia. The miracidia swim in the water and when they encounter the first intermediate host, the snail (Sternbergia sternbergii, Earth Snail), they drill into the snail's body and develop into sporocysts and redia. After two generations of redia, cercariae are produced. The cercariae have eyespots and a forked tail. After escaping from the snail's body, the cercariae swim in the water or float on the water surface. When they encounter fish, they drill into the skin or hide in the muscles, shed their tails, and develop into metacercariae. When the diseased fish is swallowed by a bird, the metacercariae are in the throat or mouth. After 4 days, they develop into adults and begin to ovulate.

Prevalence: Herons of all ages can be infected, but are more common between 7 and 30 days old. Insects are rarely found in birds younger than 7 days old and in adult birds. They are more common from March to May each year.

Clinical symptoms and hazards: In the throat, base of the tongue, lower jaw and esophagus of the heron, a large number of beige insects resembling grapefruit flesh can be seen tightly attached. The infection ranges from asymptomatic to causing the bird to become listless, with ruffled feathers, reduced luster, pale skin, slow growth, and severely infected birds can even die.

Prevention and control methods: Thoroughly remove snails such as radish snails from the ponds (waters) where herons live, and eliminate the intermediate hosts. You can use 0.7 mg/L to spray the entire pond once a day for two consecutive days. Put a grass bundle made of water plants in the downwind part of the fish pond to trap snails. You can pick up the radish snails and other snails attached to the water grass bundles every day, kill them away from the fish pond or bury them in the soil. Do this for a few days in a row, and you will get a certain effect. Prevent herons from eating sick fish infected with metacercariae. Strengthen control from the purchase, processing, and feeding of feed fish. That is, choose feed fish from healthy sources during the purchase process, pay attention to killing pathogens during the processing process, strictly control the feeding process, and remove suspicious fish meat in time. For birds infected with adult insects, use 25 mg/bird mixed feed once a day for two consecutive days, and the effect is better.

5. What are the symptoms of carp pox in fish?

[Symptoms] Some small milky white spots appear on the surface of the diseased fish, covered with a very thin layer of white mucus. Then the white spots gradually expand and increase, and spread throughout the body.

The epidermis of the affected area proliferates, forming a layer of paraffin-like growths, which gradually changes from milky white to light red to gray, or is interspersed with very fine red stripes.

The back, caudal peduncle, fins and head are densely populated areas of pimples. Severely diseased fish are covered with pimples all over the body, and there is often bleeding at the lesion sites.

These growths are often 1 to 5 mm above the body surface and are shaped like ringworm acne. Their surface changes from smooth to rough, and their texture changes from soft to cartilage-like, which is harder and generally cannot be knocked off by friction.

This epidermal growth is a dense connective tissue with some microvessels, and its main component is collagen fibers.

When the growths grow to a certain size, they will fall off automatically, but they may recur if conditions worsen.

If the growth spreads to a large part of the fish's body, it will affect the fish's growth and development, manifesting as damage to the fish's spine, softening of the bones, weight loss, and inability to swim, leading to death. [Diagnostic Tips] (1) Make a preliminary diagnosis based on symptoms and prevalence.

(2) Further diagnosis requires tissue sectioning of the growth, which shows that the growth is an abnormal proliferation of epithelial cells and connective tissue, and some epithelial cells have inclusion bodies in their nuclei.

(3) Final diagnosis requires ultrathin sectioning of the growth and observation of the herpes virus under a transmission electron microscope, or isolation and culture of the herpes virus.

6. What are the symptoms of Ichthyophthirius coli in fish?

Fish with Ichthyophthirius will have small white spots on their bodies in the early stage, and the white spots will be connected in the later stage. Fish with this disease will often be listless and have poor appetite. Public platform: Qiu Shui Yu Yue Ornamental fish medication (generally speaking, the method of increasing temperature and adding salt can be used, or ornamental fish can use mercuric nitrate, and there are also finished drugs on the market: White Spot Clear). The number of white spots may increase the day after the first medication. This is the precipitation of Ichthyophthirius in the fish's body. After the second day, if the Ichthyophthirius gradually falls off the fish's body, the white spots on the fish's body can be seen to gradually decrease with the naked eye, which means that the medication has taken effect and the situation has improved.

7. What are the symptoms of hookworm disease in fish?

【Symptoms】The larvae of the hooked shell adhere to the fish body with their foot threads and hook the mouth, gills, fins and skin of the fish with their shell hooks. They absorb nutrients from the fish body and undergo metamorphosis on the fish body. When the larvae of the hooked shell complete their metamorphosis, they fall off the fish body and are called juvenile clams. The fish body is stimulated, causing inflammation and hyperplasia of the surrounding tissues, which gradually wrap the larvae inside and form cysts. If a large fish body is parasitized by dozens of hooked shell larvae on the gill filaments or fins, it will generally have little impact. However, it will have a greater impact on fry that have been raised for 5 to 6 days, or summer flowers that are less than 3 cm in length. In particular, if they parasitize in the corners of the mouth or in the oral cavity, they can cause the fry or summer flowers to lose their ability to eat and starve to death. If they parasitize on the gills, they can cause death by suffocation due to respiratory obstruction, and often cause the head of the diseased fish to have a white head and white mouth phenomenon, so the public calls it "white head and white mouth disease". 【Diagnostic points】 (1) Preliminary diagnosis can be made based on the epidemic situation and symptoms, especially the cysts that appear on the skin, fins and gills of the diseased fish. (2) Slide the cysts for microscopic examination and confirm the diagnosis by finding almond-shaped glochid larvae. [Prevention and Control] (1) Use 125-150 kg of quicklime per mu with an average water depth of 1 meter to thoroughly clean the pond and eliminate the glochid larvae. (2) Mussels cannot be mixed in the fish fry and summer flower breeding ponds, and the incoming water must be filtered to prevent the glochid larvae from being brought into the fish pond with the water. (3) Spray the entire pond with 0.7 g/m3 of copper sulfate.

8. What are the symptoms of white head and white mouth disease in fish?

[Symptoms] The sick fish becomes thin and black, reacts slowly, floats weakly, and often stays downwind near the shore.

The skin pigmentation of the sick fish from the tip of the snout to the eyes fades and turns milky white, the lips swell and fail to open and close, causing difficulty in breathing.

The skin around the mouth is eroded and has flocculent matter attached to it. Therefore, when observing the diseased fish swimming on the surface of the water at the edge of the pond, "white head and white mouth syndrome" can be seen. However, when the diseased fish is taken out of the water for observation, the symptoms are often not obvious. [Diagnostic points] (1) The diseased fish will show obvious whitening around the mouth, white skin in the front of the head, and black body color in the water.

(2) Scrape the skin around the lesions of the diseased fish and make a slide for observation. Under high magnification, a large number of discrete and disintegrated cells and a few gliding rod-shaped bacteria can be seen.

(3) Be careful to distinguish the whitening of the body color from that caused by surface parasitic diseases such as trichodiniasis. Parasitic diseases are not as severe as white-head and white-mouth disease, and a large number of parasites can be found under microscopic examination.

9. What are the symptoms of fish suffering from tricholoma?

The pathogen is carp sphaeroides, which parasitizes on the gills or skin of farmed animals. When they are parasitic in large numbers, they can cause increased mucus, and sick fish will have difficulty breathing and slow swimming.

This disease often occurs concurrently with other parasitic diseases of the gills. It is generally prevalent in spring and autumn, with the most suitable breeding temperature being 12-18°C. When the fish are in poor health, the disease may also break out at temperatures above 20°C.

It mainly harms carp, mandarin fish and other fish fry and fingerlings, and is a common fish disease in the fry and seed breeding stage.

Clinical symptoms: The body color of the dead individual is slightly darker, the mouth is open and cannot be closed, the body surface is intact and not congested, the gill filaments are lighter in color, and there is increased mucus on the skin and gills.

When the tail fin and gill filaments were cut off and examined under a microscope, a large number of active oval worms were found, with more than 100 in one field of view. The strong mechanical movement of the worms caused increased mucus secretion and swelling of the gill filaments, leading to breathing difficulties and the death of a large number of fry. Preventive measures ① Thoroughly clean the pond, dry the pond bottom, and kill the parasite eggs;

②During the peak season of disease, use insecticides such as Yuanchongjing regularly to inhibit the reproduction of insects;

③ When the fry are placed in the pond, soak them in 8 mg/L copper sulfate or 2% salt solution for 20 minutes, or soak them in 10-15 mg/L potassium permanganate for 15-30 minutes. Treatment measures ① Spray Xinyang insecticide and copper sulfate mixture 1-2 times in the whole pond, with the dosage of 200 g/mu and 300 g/mu respectively;

②Spray the whole pool with Xieguanlisha or Yuanzojing, and disinfect with chlorine dioxide or povidone-iodine solution the next day;

③ Spray the entire pool with a mixture of copper sulfate and ferrous sulfate, and disinfect with chlorine dioxide or povidone-iodine solution the next day.

10. What are the symptoms of gas vehicle idling?

1. Unstable idling: The engine speed is unstable when the vehicle is idling, and sometimes there will be shaking, jumping and other phenomena.

2. Idle speed: When the vehicle is idling, the engine speed keeps fluctuating up and down, and the fluctuation range is large.

3. Idle failure: The engine speed suddenly drops or stalls when the vehicle is idling.

4. Heavy idling load: When the vehicle is idling, the engine speed is high and the engine load is heavy.