Veterinary Clinical Parasitology. Anne M. Zajac
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from the packets and ma...Fig. 1.99 Dipylidium caninum segments on the surface of a canine fecal sampl...Fig. 1.100 Taenia eggs are brown with a thick shell wall (embryophore) and c...Fig. 1.101 Eggs of Eucoleus (E), Toxocara (To), and Taenia (Ta) and oocysts ...Fig. 1.102 Tapeworm segments from an animal (A) can usually be easily identi...Fig. 1.103 Embryonic hooks are visible in the two Taenia or Echinococcus egg...Fig. 1.104 Mesocestoides eggs have a thin, clear, smooth shell wall and cont...Fig. 1.105 Mature tapeworm segments passed in the feces may be observed by o...Fig. 1.106 Within hours of passing from the host, tapeworm segments lose the...Fig. 1.107 Unlike common tapeworms, Diphyllobothrium eggs lack hooks and res...Fig. 1.108 The operculate eggs of Spirometra also resemble trematode eggs. T...Fig. 1.109 Alaria eggs are large, operculate, yellow‐brown in color and cont...Fig. 1.110 Sometimes Alaria spp. eggs are detected using the centrifugal flo...Fig. 1.111 Paragonimus eggs have an undifferentiated embryo when passed in t...Fig. 1.112 The operculated eggs of Nanophyetus contain an undifferentiated e...Fig. 1.113 The large, elliptical eggs of Heterobilharzia americana have a sm...Fig. 1.114 On contact with freshwater, H. americana eggs hatch, releasing a ...Fig. 1.115 The small brown eggs of Platynosomum have an operculum at one end...Fig. 1.116 Platynosomum (arrow) and Trichuris eggs in the feces of a cat. Bo...Fig. 1.117 Cryptocotyle lingua egg detected on fecal sedimentation of feces ...Fig. 1.118 Metorchis is another genus of flukes present in wild animals that...Fig. 1.119 Large eggs of Linguatula may be seen in dogs in North America wit...Fig. 1.120 Macracanthorhynchus ingens eggs. Acanthocephalan eggs contain a l...Fig. 1.121 Parasites found in bovine feces.Fig. 1.122 Parasites found in feces of sheep and goats.Fig. 1.123 Ruminants and camelids are infected with a variety of Eimeria spp...Fig. 1.124 Bovine Eimeria oocysts (relative sizes not accurate; see Table 1....Fig. 1.125 Small ruminants are infected with a variety of coccidia species, ...Fig. 1.126 The oocyst shown here is E. ninakohlyakimovae from a goat. A simi...Fig. 1.127 Many, but not all, Eimeria species have a cap that covers the mic...Fig. 1.128 In this bovine fecal sample, several fully sporulated Eimeria ooc...Fig. 1.129 Eimeria llamae (A) and the smaller E. punonensis (B) are coccidia...Fig. 1.130 New World camelids are also infected with two species of Eimeria ...Fig. 1.131 The small oocysts of Cryptosporidium are best seen using the high...Fig. 1.132 Cryptosporidium oocysts can also be detected in acid fast‐stained...Fig. 1.133 This calf fecal sample contains a larvated Strongyloides egg (S) ...Fig. 1.134 Cyst of Buxtonella sulcata. These cysts may be seen in bovine fec...Fig. 1.135 The strongylid (also referred to as strongyle or trichostrongyle)...Fig. 1.136 Once strongylid eggs are exposed to oxygen and adequate temperatu...Fig. 1.137 Egg of Nematodirus sp. This is one of the few strongylid eggs of ...Fig. 1.138 Ovine fecal sample containing strongylid eggs (S), and a Nematodi...Fig. 1.139 Strongyloides eggs may be confused with strongylid eggs. The two ...Fig. 1.140 Trichuris eggs are common in ruminant feces. They have a thick, b...Fig. 1.141 This bipolar Aonchotheca (Capillaria) egg can be confused with Tr...Fig. 1.142 Ruminant fecal sample containing both Trichuris (T) and Aonchothe...Fig. 1.143 Camelids can be infected with Aonchotheca sp. but are also parasi...Fig. 1.144 Toxocara vitulorum eggs have the thick shell typical of ascarids....Fig. 1.145 Skrjabinema (Sk), the ruminant pinworm. Pinworm eggs often appear...Fig. 1.146 Iodine‐stained Muellerius larva.Fig. 1.147 Muellerius larvae can be easily identified by the presence of a k...Fig. 1.148 Parelaphostrongylus, a parasite of white‐tailed deer, produces fi...Fig. 1.149 Protostrongylus larvae have a plain tail without the kink and acc...Fig. 1.150 Higher magnification view of the simple tail of a ProtostrongylusFig. 1.151 Dictyocaulus viviparus first‐stage larva. Intestinal cells contai...Fig. 1.152 Although Dictyocaulus larvae are most often seen in fecal samples...Fig. 1.153 Eggs of Moniezia are often square or triangular, unlike the more ...Fig. 1.154 Owners may be alarmed by the presence of Moniezia segments in the...Fig. 1.155 Packet of Thysanosoma eggs from a sheep. The eggs lack the pyrifo...Fig. 1.156 Fasciola hepatica egg. These large eggs have an operculum (arrow)...Fig. 1.157 Fasciola hepatica (F) and Paramphistomum (P) eggs. The two eggs a...Fig. 1.158 Egg of Fascioloides magna, the liver fluke of white‐tailed deer. ...Fig. 1.159 Dicrocoelium dendriticum eggs contain a fully formed miracidium, ...Fig. 1.160 The eggs of Eurytrema are similar in appearance to those of Dicro...Fig. 1.161 Ruminant schistosomes typically produce a spindle‐shaped egg. Thi...Fig. 1.162 Parasites found in fecal samples of horses. Figure courtesy of Dr...Fig. 1.163 The large size and deep‐brown color of the oocysts of E. leuckart...Fig. 1.164 Fecal flotation test containing iodine‐stained Giardia cysts.Fig. 1.165 Cryptosporidium oocysts in a sugar flotation preparation.Fig. 1.166 Equine strongylid (strongyle) eggs in fresh fecal samples are typ...Fig. 1.167 Several equine strongylid eggs are present in this fecal sample. ...Fig. 1.168 Equine small strongyle larvae (arrows) in manure. These small (le...Fig. 1.169 Parascaris eggs are typical, thick‐shelled ascarid eggs containin...Fig. 1.170 Parascaris eggs may lose the rough, proteinaceous coat on the egg...Fig. 1.171 Larvated strongylid egg and Parascaris egg that has undergone the...Fig. 1.172 Egg of Strongyloides westeri, the horse threadworm. These eggs ar...Fig. 1.173 Oxyuris eggs are asymmetrical with a single polar plug. Eggs embr...Fig. 1.174 Adult pinworms are occasionally seen in the feces of horses. Adul...Fig. 1.175 Larvated egg of Habronema sp. The larva is surrounded by a thin s...Fig. 1.176 The only parasitic nematode larvae that would be expected in the ...Fig. 1.177 Larvae of Dictyocaulus arnfieldi, the equid lungworm, have a smal...Fig. 1.178 The egg of the equine tapeworm Anoplocephala is similar in appear...Fig. 1.179 Anoplocephala egg (A) and several equine strongylid eggs.Fig. 1.180 Parasites found in fecal samples of pigs.Fig. 1.181 Unsporulated (A) and sporulated (B) oocyst of Cystoisospora suis....Fig. 1.182 Oocysts of E. porci (P) and E. scabra (S), two of the eight Eimer...Fig. 1.183 Numerous Eimeria oocyts in a porcine fecal sample. Although commo...Fig. 1.184 Balantidium coli trophozoite in a direct saline smear. The cilia ...Fig. 1.185 The kidney‐bean‐shaped macronucleus, characteristic of ciliates, ...Fig. 1.186 Hyperosmotic flotation solutions can cause distortion of Balantid...Fig. 1.187 Like other ascarid eggs, those of Ascaris suum contain a single c...Fig. 1.188 Hyostrongylus and Oesophagostomum are the most common and importa...Fig. 1.189 Like other members of the genus, eggs of Trichuris suis, the swin...Fig. 1.190 Larvated Strongyloides eggs are usually present only in the feces...Fig. 1.191 The small Strongyloides ransomi egg (Sr) pictured here could be c...Fig. 1.192 In fresh fecal samples, Metastrongylus eggs contain a larva and h...Fig. 1.193 Egg of Physocephalus.Fig. 1.194 Ascarops egg. Spirurid eggs are unlikely to be seen if standard f...Fig. 1.195 Fasciola eggs. Trematode infections are rarely encountered in swi...Fig. 1.196 Macracanthorhynchus hirudinaceus egg. The embryo (acanthor) is su...Fig. 1.197 Eimeria spp. oocysts from a chicken. Eimeria species are common p...Fig. 1.198 After reaching the environment, Eimeria oocysts sporulate; the le...Fig. 1.199 Isospora spp. can also be found in birds, as seen in this fecal s...Fig. 1.200 Caryospora oocyst. The sporulated oocyst of this genus contains a...Fig. 1.201 Sarcocystis is another coccidia genus that may be found in the fe...Fig. 1.202 Cryptosporidium spp. oocysts in birds are similar in appearance t...Fig. 1.203 Trichomonas spp. in birds have an undulating membrane and several...Fig. 1.204 Chilomastix is a genus of intestinal flagellate found in birds, p...Fig. 1.205 Eggs of Capillaria spp. are very common in the feces of domestic ...Fig. 1.206 Egg of Eucoleus dispar from a sharp‐shinned hawk.Fig. 1.207 Capillaria sp. egg in an owl (arrow). The larger, browner egg bel...Fig. 1.208 A smooth, thick shell is seen in both Ascaridia spp. and Heteraki...Fig. 1.209 Another ascarid genus found in ducks and wild birds is PorrocecumFig. 1.210 Subulura brumpti eggs in the feces of a chicken. Unlike most asca...Fig. 1.211 Strongylid egg and coccidia oocysts in an avian fecal sample.Fig. 1.212 Syngamus sp. egg from a crow. This is a common parasite of wild b...Fig. 1.213 Like Syngamus, eggs of Capillaria and Eucoleus spp. have bipolar ...Fig. 1.214 Spirurid egg in the feces of a double‐crested cormorant. Larvae a...Fig. 1.215 Spirurid egg in the feces of a red‐tailed hawk. The larva within ...Fig. 1.216 Tetrameres egg in the feces of a homing pigeon. Like other